cpython-lru_cache-weakref: Lib/test/test

annotate Lib/test/test_itertools.py @ 79675:c0a2294de787 2.7

Issue #16199: Backport 2to3 typo fix from 3.2.

author	Chris Jerdonek <chris.jerdonek@gmail.com>
date	Thu, 11 Oct 2012 16:15:46 -0700
parents	5c8a84ab86f2
children	62f2d3f6015e

rev	line source
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1 import unittest
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	2 from test import test_support
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	3 from itertools import *
33777 e4b7c923ed5f Fix and test weak referencing of itertools.tee objects. Raymond Hettinger <python@rcn.com> parents: 33624 diff changeset	4 from weakref import proxy
51547 df69bccdd363 Add an extra testcase. Raymond Hettinger <python@rcn.com> parents: 51541 diff changeset	5 from decimal import Decimal
51549 099e960676b9 One more test. Raymond Hettinger <python@rcn.com> parents: 51547 diff changeset	6 from fractions import Fraction
27747 941de791b17a SF bug #681003: itertools issues Raymond Hettinger <python@rcn.com> parents: 27574 diff changeset	7 import sys
28945 001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	8 import operator
30764 b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	9 import random
57517 1ff2c3edc13c Issue #7410: deepcopy of itertools.count() erroneously reset the count. Raymond Hettinger <python@rcn.com> parents: 57033 diff changeset	10 import copy
1ff2c3edc13c Issue #7410: deepcopy of itertools.count() erroneously reset the count. Raymond Hettinger <python@rcn.com> parents: 57033 diff changeset	11 import pickle
63556 dba99828d91c Merged revisions 77942,79023 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 57517 diff changeset	12 from functools import reduce
41633 5d0969167f6d Merging change 55102 from the trunk: Kristján Valur Jónsson <kristjan@ccpgames.com> parents: 40766 diff changeset	13 maxsize = test_support.MAX_Py_ssize_t
5d0969167f6d Merging change 55102 from the trunk: Kristján Valur Jónsson <kristjan@ccpgames.com> parents: 40766 diff changeset	14 minsize = -maxsize-1
28945 001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	15
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	16 def onearg(x):
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	17 'Test function of one argument'
29303 e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	18 return 2*x
28945 001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	19
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	20 def errfunc(*args):
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	21 'Test function that raises an error'
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	22 raise ValueError
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	23
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	24 def gen3():
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	25 'Non-restartable source sequence'
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	26 for i in (0, 1, 2):
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	27 yield i
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	28
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	29 def isEven(x):
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	30 'Test predicate'
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	31 return x%2==0
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	32
29303 e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	33 def isOdd(x):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	34 'Test predicate'
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	35 return x%2==1
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	36
28945 001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	37 class StopNow:
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	38 'Class emulating an empty iterable.'
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	39 def __iter__(self):
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	40 return self
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	41 def next(self):
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	42 raise StopIteration
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	43
29690 72dcc63f4dea More tests Raymond Hettinger <python@rcn.com> parents: 29627 diff changeset	44 def take(n, seq):
72dcc63f4dea More tests Raymond Hettinger <python@rcn.com> parents: 29627 diff changeset	45 'Convenience function for partially consuming a long of infinite iterable'
72dcc63f4dea More tests Raymond Hettinger <python@rcn.com> parents: 29627 diff changeset	46 return list(islice(seq, n))
29303 e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	47
45651 e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	48 def prod(iterable):
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	49 return reduce(operator.mul, iterable, 1)
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	50
45539 ca45eb71f2d2 Add itertools.combinations(). Raymond Hettinger <python@rcn.com> parents: 45524 diff changeset	51 def fact(n):
ca45eb71f2d2 Add itertools.combinations(). Raymond Hettinger <python@rcn.com> parents: 45524 diff changeset	52 'Factorial'
45651 e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	53 return prod(range(1, n+1))
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	54
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	55 class TestBasicOps(unittest.TestCase):
28024 61fa6b55c1de User requested changes to the itertools module. Raymond Hettinger <python@rcn.com> parents: 27769 diff changeset	56 def test_chain(self):
45698 44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	57
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	58 def chain2(*iterables):
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	59 'Pure python version in the docs'
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	60 for it in iterables:
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	61 for element in it:
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	62 yield element
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	63
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	64 for c in (chain, chain2):
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	65 self.assertEqual(list(c('abc', 'def')), list('abcdef'))
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	66 self.assertEqual(list(c('abc')), list('abc'))
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	67 self.assertEqual(list(c('')), [])
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	68 self.assertEqual(take(4, c('abc', 'def')), list('abcd'))
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	69 self.assertRaises(TypeError, list,c(2, 3))
28024 61fa6b55c1de User requested changes to the itertools module. Raymond Hettinger <python@rcn.com> parents: 27769 diff changeset	70
45563 7da36b49c9e5 Add alternate constructor for itertools.chain(). Raymond Hettinger <python@rcn.com> parents: 45562 diff changeset	71 def test_chain_from_iterable(self):
7da36b49c9e5 Add alternate constructor for itertools.chain(). Raymond Hettinger <python@rcn.com> parents: 45562 diff changeset	72 self.assertEqual(list(chain.from_iterable(['abc', 'def'])), list('abcdef'))
7da36b49c9e5 Add alternate constructor for itertools.chain(). Raymond Hettinger <python@rcn.com> parents: 45562 diff changeset	73 self.assertEqual(list(chain.from_iterable(['abc'])), list('abc'))
7da36b49c9e5 Add alternate constructor for itertools.chain(). Raymond Hettinger <python@rcn.com> parents: 45562 diff changeset	74 self.assertEqual(list(chain.from_iterable([''])), [])
7da36b49c9e5 Add alternate constructor for itertools.chain(). Raymond Hettinger <python@rcn.com> parents: 45562 diff changeset	75 self.assertEqual(take(4, chain.from_iterable(['abc', 'def'])), list('abcd'))
7da36b49c9e5 Add alternate constructor for itertools.chain(). Raymond Hettinger <python@rcn.com> parents: 45562 diff changeset	76 self.assertRaises(TypeError, list, chain.from_iterable([2, 3]))
7da36b49c9e5 Add alternate constructor for itertools.chain(). Raymond Hettinger <python@rcn.com> parents: 45562 diff changeset	77
45539 ca45eb71f2d2 Add itertools.combinations(). Raymond Hettinger <python@rcn.com> parents: 45524 diff changeset	78 def test_combinations(self):
50630 0b8d2cf3f55b - Issue 4816: itertools.combinations() and itertools.product were raising Raymond Hettinger <python@rcn.com> parents: 50465 diff changeset	79 self.assertRaises(TypeError, combinations, 'abc') # missing r argument
45539 ca45eb71f2d2 Add itertools.combinations(). Raymond Hettinger <python@rcn.com> parents: 45524 diff changeset	80 self.assertRaises(TypeError, combinations, 'abc', 2, 1) # too many arguments
45651 e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	81 self.assertRaises(TypeError, combinations, None) # pool is not iterable
45539 ca45eb71f2d2 Add itertools.combinations(). Raymond Hettinger <python@rcn.com> parents: 45524 diff changeset	82 self.assertRaises(ValueError, combinations, 'abc', -2) # r is negative
50630 0b8d2cf3f55b - Issue 4816: itertools.combinations() and itertools.product were raising Raymond Hettinger <python@rcn.com> parents: 50465 diff changeset	83 self.assertEqual(list(combinations('abc', 32)), []) # r > n
45539 ca45eb71f2d2 Add itertools.combinations(). Raymond Hettinger <python@rcn.com> parents: 45524 diff changeset	84 self.assertEqual(list(combinations(range(4), 3)),
ca45eb71f2d2 Add itertools.combinations(). Raymond Hettinger <python@rcn.com> parents: 45524 diff changeset	85 [(0,1,2), (0,1,3), (0,2,3), (1,2,3)])
45651 e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	86
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	87 def combinations1(iterable, r):
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	88 'Pure python version shown in the docs'
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	89 pool = tuple(iterable)
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	90 n = len(pool)
50630 0b8d2cf3f55b - Issue 4816: itertools.combinations() and itertools.product were raising Raymond Hettinger <python@rcn.com> parents: 50465 diff changeset	91 if r > n:
0b8d2cf3f55b - Issue 4816: itertools.combinations() and itertools.product were raising Raymond Hettinger <python@rcn.com> parents: 50465 diff changeset	92 return
45651 e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	93 indices = range(r)
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	94 yield tuple(pool[i] for i in indices)
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	95 while 1:
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	96 for i in reversed(range(r)):
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	97 if indices[i] != i + n - r:
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	98 break
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	99 else:
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	100 return
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	101 indices[i] += 1
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	102 for j in range(i+1, r):
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	103 indices[j] = indices[j-1] + 1
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	104 yield tuple(pool[i] for i in indices)
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	105
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	106 def combinations2(iterable, r):
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	107 'Pure python version shown in the docs'
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	108 pool = tuple(iterable)
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	109 n = len(pool)
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	110 for indices in permutations(range(n), r):
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	111 if sorted(indices) == list(indices):
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	112 yield tuple(pool[i] for i in indices)
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	113
51106 d170fdf4bdfb Add tests to verify combinatoric relationships. Raymond Hettinger <python@rcn.com> parents: 51097 diff changeset	114 def combinations3(iterable, r):
d170fdf4bdfb Add tests to verify combinatoric relationships. Raymond Hettinger <python@rcn.com> parents: 51097 diff changeset	115 'Pure python version from cwr()'
d170fdf4bdfb Add tests to verify combinatoric relationships. Raymond Hettinger <python@rcn.com> parents: 51097 diff changeset	116 pool = tuple(iterable)
d170fdf4bdfb Add tests to verify combinatoric relationships. Raymond Hettinger <python@rcn.com> parents: 51097 diff changeset	117 n = len(pool)
d170fdf4bdfb Add tests to verify combinatoric relationships. Raymond Hettinger <python@rcn.com> parents: 51097 diff changeset	118 for indices in combinations_with_replacement(range(n), r):
d170fdf4bdfb Add tests to verify combinatoric relationships. Raymond Hettinger <python@rcn.com> parents: 51097 diff changeset	119 if len(set(indices)) == r:
d170fdf4bdfb Add tests to verify combinatoric relationships. Raymond Hettinger <python@rcn.com> parents: 51097 diff changeset	120 yield tuple(pool[i] for i in indices)
d170fdf4bdfb Add tests to verify combinatoric relationships. Raymond Hettinger <python@rcn.com> parents: 51097 diff changeset	121
45651 e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	122 for n in range(7):
45539 ca45eb71f2d2 Add itertools.combinations(). Raymond Hettinger <python@rcn.com> parents: 45524 diff changeset	123 values = [5*x-12 for x in range(n)]
50630 0b8d2cf3f55b - Issue 4816: itertools.combinations() and itertools.product were raising Raymond Hettinger <python@rcn.com> parents: 50465 diff changeset	124 for r in range(n+2):
45539 ca45eb71f2d2 Add itertools.combinations(). Raymond Hettinger <python@rcn.com> parents: 45524 diff changeset	125 result = list(combinations(values, r))
63556 dba99828d91c Merged revisions 77942,79023 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 57517 diff changeset	126 self.assertEqual(len(result), 0 if r>n else fact(n) // fact(r) // fact(n-r)) # right number of combs
45539 ca45eb71f2d2 Add itertools.combinations(). Raymond Hettinger <python@rcn.com> parents: 45524 diff changeset	127 self.assertEqual(len(result), len(set(result))) # no repeats
ca45eb71f2d2 Add itertools.combinations(). Raymond Hettinger <python@rcn.com> parents: 45524 diff changeset	128 self.assertEqual(result, sorted(result)) # lexicographic order
ca45eb71f2d2 Add itertools.combinations(). Raymond Hettinger <python@rcn.com> parents: 45524 diff changeset	129 for c in result:
ca45eb71f2d2 Add itertools.combinations(). Raymond Hettinger <python@rcn.com> parents: 45524 diff changeset	130 self.assertEqual(len(c), r) # r-length combinations
ca45eb71f2d2 Add itertools.combinations(). Raymond Hettinger <python@rcn.com> parents: 45524 diff changeset	131 self.assertEqual(len(set(c)), r) # no duplicate elements
ca45eb71f2d2 Add itertools.combinations(). Raymond Hettinger <python@rcn.com> parents: 45524 diff changeset	132 self.assertEqual(list(c), sorted(c)) # keep original ordering
55002 6768b2350c57 convert usage of fail* to assert* Benjamin Peterson <benjamin@python.org> parents: 51772 diff changeset	133 self.assertTrue(all(e in values for e in c)) # elements taken from input iterable
45675 c197e18449b4 C implementation of itertools.permutations(). Raymond Hettinger <python@rcn.com> parents: 45651 diff changeset	134 self.assertEqual(list(c),
c197e18449b4 C implementation of itertools.permutations(). Raymond Hettinger <python@rcn.com> parents: 45651 diff changeset	135 [e for e in values if e in c]) # comb is a subsequence of the input iterable
45651 e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	136 self.assertEqual(result, list(combinations1(values, r))) # matches first pure python version
50630 0b8d2cf3f55b - Issue 4816: itertools.combinations() and itertools.product were raising Raymond Hettinger <python@rcn.com> parents: 50465 diff changeset	137 self.assertEqual(result, list(combinations2(values, r))) # matches second pure python version
51106 d170fdf4bdfb Add tests to verify combinatoric relationships. Raymond Hettinger <python@rcn.com> parents: 51097 diff changeset	138 self.assertEqual(result, list(combinations3(values, r))) # matches second pure python version
45651 e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	139
71399 5c8a84ab86f2 Backport 2eb8789e30e7. Alex Gaynor <alex.gaynor@gmail.com> parents: 68588 diff changeset	140 @test_support.impl_detail("tuple reuse is specific to CPython")
5c8a84ab86f2 Backport 2eb8789e30e7. Alex Gaynor <alex.gaynor@gmail.com> parents: 68588 diff changeset	141 def test_combinations_tuple_reuse(self):
45651 e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	142 self.assertEqual(len(set(map(id, combinations('abcde', 3)))), 1)
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	143 self.assertNotEqual(len(set(map(id, list(combinations('abcde', 3))))), 1)
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	144
51097 b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	145 def test_combinations_with_replacement(self):
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	146 cwr = combinations_with_replacement
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	147 self.assertRaises(TypeError, cwr, 'abc') # missing r argument
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	148 self.assertRaises(TypeError, cwr, 'abc', 2, 1) # too many arguments
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	149 self.assertRaises(TypeError, cwr, None) # pool is not iterable
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	150 self.assertRaises(ValueError, cwr, 'abc', -2) # r is negative
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	151 self.assertEqual(list(cwr('ABC', 2)),
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	152 [('A','A'), ('A','B'), ('A','C'), ('B','B'), ('B','C'), ('C','C')])
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	153
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	154 def cwr1(iterable, r):
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	155 'Pure python version shown in the docs'
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	156 # number items returned: (n+r-1)! / r! / (n-1)! when n>0
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	157 pool = tuple(iterable)
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	158 n = len(pool)
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	159 if not n and r:
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	160 return
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	161 indices = [0] * r
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	162 yield tuple(pool[i] for i in indices)
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	163 while 1:
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	164 for i in reversed(range(r)):
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	165 if indices[i] != n - 1:
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	166 break
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	167 else:
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	168 return
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	169 indices[i:] = [indices[i] + 1] * (r - i)
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	170 yield tuple(pool[i] for i in indices)
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	171
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	172 def cwr2(iterable, r):
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	173 'Pure python version shown in the docs'
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	174 pool = tuple(iterable)
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	175 n = len(pool)
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	176 for indices in product(range(n), repeat=r):
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	177 if sorted(indices) == list(indices):
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	178 yield tuple(pool[i] for i in indices)
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	179
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	180 def numcombs(n, r):
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	181 if not n:
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	182 return 0 if r else 1
58669 ff040880d1be #7092: Silence more py3k warnings. Patch by Florent Xicluna. Ezio Melotti <ezio.melotti@gmail.com> parents: 58460 diff changeset	183 return fact(n+r-1) // fact(r) // fact(n-1)
51097 b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	184
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	185 for n in range(7):
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	186 values = [5*x-12 for x in range(n)]
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	187 for r in range(n+2):
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	188 result = list(cwr(values, r))
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	189
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	190 self.assertEqual(len(result), numcombs(n, r)) # right number of combs
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	191 self.assertEqual(len(result), len(set(result))) # no repeats
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	192 self.assertEqual(result, sorted(result)) # lexicographic order
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	193
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	194 regular_combs = list(combinations(values, r)) # compare to combs without replacement
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	195 if n == 0 or r <= 1:
66348 614c84670c63 Merged revisions 86596 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 58669 diff changeset	196 self.assertEqual(result, regular_combs) # cases that should be identical
51097 b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	197 else:
55002 6768b2350c57 convert usage of fail* to assert* Benjamin Peterson <benjamin@python.org> parents: 51772 diff changeset	198 self.assertTrue(set(result) >= set(regular_combs)) # rest should be supersets of regular combs
51097 b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	199
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	200 for c in result:
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	201 self.assertEqual(len(c), r) # r-length combinations
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	202 noruns = [k for k,v in groupby(c)] # combo without consecutive repeats
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	203 self.assertEqual(len(noruns), len(set(noruns))) # no repeats other than consecutive
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	204 self.assertEqual(list(c), sorted(c)) # keep original ordering
55002 6768b2350c57 convert usage of fail* to assert* Benjamin Peterson <benjamin@python.org> parents: 51772 diff changeset	205 self.assertTrue(all(e in values for e in c)) # elements taken from input iterable
51097 b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	206 self.assertEqual(noruns,
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	207 [e for e in values if e in c]) # comb is a subsequence of the input iterable
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	208 self.assertEqual(result, list(cwr1(values, r))) # matches first pure python version
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	209 self.assertEqual(result, list(cwr2(values, r))) # matches second pure python version
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	210
71399 5c8a84ab86f2 Backport 2eb8789e30e7. Alex Gaynor <alex.gaynor@gmail.com> parents: 68588 diff changeset	211 @test_support.impl_detail("tuple reuse is specific to CPython")
5c8a84ab86f2 Backport 2eb8789e30e7. Alex Gaynor <alex.gaynor@gmail.com> parents: 68588 diff changeset	212 def test_combinations_with_replacement_tuple_reuse(self):
5c8a84ab86f2 Backport 2eb8789e30e7. Alex Gaynor <alex.gaynor@gmail.com> parents: 68588 diff changeset	213 cwr = combinations_with_replacement
51097 b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	214 self.assertEqual(len(set(map(id, cwr('abcde', 3)))), 1)
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	215 self.assertNotEqual(len(set(map(id, list(cwr('abcde', 3))))), 1)
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	216
45651 e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	217 def test_permutations(self):
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	218 self.assertRaises(TypeError, permutations) # too few arguments
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	219 self.assertRaises(TypeError, permutations, 'abc', 2, 1) # too many arguments
45675 c197e18449b4 C implementation of itertools.permutations(). Raymond Hettinger <python@rcn.com> parents: 45651 diff changeset	220 self.assertRaises(TypeError, permutations, None) # pool is not iterable
c197e18449b4 C implementation of itertools.permutations(). Raymond Hettinger <python@rcn.com> parents: 45651 diff changeset	221 self.assertRaises(ValueError, permutations, 'abc', -2) # r is negative
50630 0b8d2cf3f55b - Issue 4816: itertools.combinations() and itertools.product were raising Raymond Hettinger <python@rcn.com> parents: 50465 diff changeset	222 self.assertEqual(list(permutations('abc', 32)), []) # r > n
45675 c197e18449b4 C implementation of itertools.permutations(). Raymond Hettinger <python@rcn.com> parents: 45651 diff changeset	223 self.assertRaises(TypeError, permutations, 'abc', 's') # r is not an int or None
45651 e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	224 self.assertEqual(list(permutations(range(3), 2)),
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	225 [(0,1), (0,2), (1,0), (1,2), (2,0), (2,1)])
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	226
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	227 def permutations1(iterable, r=None):
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	228 'Pure python version shown in the docs'
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	229 pool = tuple(iterable)
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	230 n = len(pool)
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	231 r = n if r is None else r
50630 0b8d2cf3f55b - Issue 4816: itertools.combinations() and itertools.product were raising Raymond Hettinger <python@rcn.com> parents: 50465 diff changeset	232 if r > n:
0b8d2cf3f55b - Issue 4816: itertools.combinations() and itertools.product were raising Raymond Hettinger <python@rcn.com> parents: 50465 diff changeset	233 return
45651 e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	234 indices = range(n)
46017 fa418cdf3bfe Simplify demo code. Raymond Hettinger <python@rcn.com> parents: 45725 diff changeset	235 cycles = range(n, n-r, -1)
45651 e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	236 yield tuple(pool[i] for i in indices[:r])
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	237 while n:
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	238 for i in reversed(range(r)):
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	239 cycles[i] -= 1
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	240 if cycles[i] == 0:
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	241 indices[i:] = indices[i+1:] + indices[i:i+1]
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	242 cycles[i] = n - i
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	243 else:
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	244 j = cycles[i]
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	245 indices[i], indices[-j] = indices[-j], indices[i]
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	246 yield tuple(pool[i] for i in indices[:r])
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	247 break
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	248 else:
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	249 return
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	250
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	251 def permutations2(iterable, r=None):
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	252 'Pure python version shown in the docs'
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	253 pool = tuple(iterable)
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	254 n = len(pool)
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	255 r = n if r is None else r
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	256 for indices in product(range(n), repeat=r):
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	257 if len(set(indices)) == r:
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	258 yield tuple(pool[i] for i in indices)
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	259
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	260 for n in range(7):
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	261 values = [5*x-12 for x in range(n)]
50630 0b8d2cf3f55b - Issue 4816: itertools.combinations() and itertools.product were raising Raymond Hettinger <python@rcn.com> parents: 50465 diff changeset	262 for r in range(n+2):
45651 e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	263 result = list(permutations(values, r))
63556 dba99828d91c Merged revisions 77942,79023 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 57517 diff changeset	264 self.assertEqual(len(result), 0 if r>n else fact(n) // fact(n-r)) # right number of perms
45651 e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	265 self.assertEqual(len(result), len(set(result))) # no repeats
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	266 self.assertEqual(result, sorted(result)) # lexicographic order
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	267 for p in result:
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	268 self.assertEqual(len(p), r) # r-length permutations
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	269 self.assertEqual(len(set(p)), r) # no duplicate elements
55002 6768b2350c57 convert usage of fail* to assert* Benjamin Peterson <benjamin@python.org> parents: 51772 diff changeset	270 self.assertTrue(all(e in values for e in p)) # elements taken from input iterable
45651 e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	271 self.assertEqual(result, list(permutations1(values, r))) # matches first pure python version
50630 0b8d2cf3f55b - Issue 4816: itertools.combinations() and itertools.product were raising Raymond Hettinger <python@rcn.com> parents: 50465 diff changeset	272 self.assertEqual(result, list(permutations2(values, r))) # matches second pure python version
45651 e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	273 if r == n:
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	274 self.assertEqual(result, list(permutations(values, None))) # test r as None
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	275 self.assertEqual(result, list(permutations(values))) # test default r
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	276
71399 5c8a84ab86f2 Backport 2eb8789e30e7. Alex Gaynor <alex.gaynor@gmail.com> parents: 68588 diff changeset	277 @test_support.impl_detail("tuple resuse is CPython specific")
5c8a84ab86f2 Backport 2eb8789e30e7. Alex Gaynor <alex.gaynor@gmail.com> parents: 68588 diff changeset	278 def test_permutations_tuple_reuse(self):
45675 c197e18449b4 C implementation of itertools.permutations(). Raymond Hettinger <python@rcn.com> parents: 45651 diff changeset	279 self.assertEqual(len(set(map(id, permutations('abcde', 3)))), 1)
45651 e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	280 self.assertNotEqual(len(set(map(id, list(permutations('abcde', 3))))), 1)
28024 61fa6b55c1de User requested changes to the itertools module. Raymond Hettinger <python@rcn.com> parents: 27769 diff changeset	281
51106 d170fdf4bdfb Add tests to verify combinatoric relationships. Raymond Hettinger <python@rcn.com> parents: 51097 diff changeset	282 def test_combinatorics(self):
d170fdf4bdfb Add tests to verify combinatoric relationships. Raymond Hettinger <python@rcn.com> parents: 51097 diff changeset	283 # Test relationships between product(), permutations(),
d170fdf4bdfb Add tests to verify combinatoric relationships. Raymond Hettinger <python@rcn.com> parents: 51097 diff changeset	284 # combinations() and combinations_with_replacement().
d170fdf4bdfb Add tests to verify combinatoric relationships. Raymond Hettinger <python@rcn.com> parents: 51097 diff changeset	285
51114 2254cd3200f0 More exhaustive combinatoric checks. Raymond Hettinger <python@rcn.com> parents: 51108 diff changeset	286 for n in range(6):
2254cd3200f0 More exhaustive combinatoric checks. Raymond Hettinger <python@rcn.com> parents: 51108 diff changeset	287 s = 'ABCDEFG'[:n]
2254cd3200f0 More exhaustive combinatoric checks. Raymond Hettinger <python@rcn.com> parents: 51108 diff changeset	288 for r in range(8):
2254cd3200f0 More exhaustive combinatoric checks. Raymond Hettinger <python@rcn.com> parents: 51108 diff changeset	289 prod = list(product(s, repeat=r))
2254cd3200f0 More exhaustive combinatoric checks. Raymond Hettinger <python@rcn.com> parents: 51108 diff changeset	290 cwr = list(combinations_with_replacement(s, r))
2254cd3200f0 More exhaustive combinatoric checks. Raymond Hettinger <python@rcn.com> parents: 51108 diff changeset	291 perm = list(permutations(s, r))
2254cd3200f0 More exhaustive combinatoric checks. Raymond Hettinger <python@rcn.com> parents: 51108 diff changeset	292 comb = list(combinations(s, r))
2254cd3200f0 More exhaustive combinatoric checks. Raymond Hettinger <python@rcn.com> parents: 51108 diff changeset	293
2254cd3200f0 More exhaustive combinatoric checks. Raymond Hettinger <python@rcn.com> parents: 51108 diff changeset	294 # Check size
66348 614c84670c63 Merged revisions 86596 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 58669 diff changeset	295 self.assertEqual(len(prod), n**r)
614c84670c63 Merged revisions 86596 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 58669 diff changeset	296 self.assertEqual(len(cwr), (fact(n+r-1) // fact(r) // fact(n-1)) if n else (not r))
614c84670c63 Merged revisions 86596 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 58669 diff changeset	297 self.assertEqual(len(perm), 0 if r>n else fact(n) // fact(n-r))
614c84670c63 Merged revisions 86596 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 58669 diff changeset	298 self.assertEqual(len(comb), 0 if r>n else fact(n) // fact(r) // fact(n-r))
51106 d170fdf4bdfb Add tests to verify combinatoric relationships. Raymond Hettinger <python@rcn.com> parents: 51097 diff changeset	299
51114 2254cd3200f0 More exhaustive combinatoric checks. Raymond Hettinger <python@rcn.com> parents: 51108 diff changeset	300 # Check lexicographic order without repeated tuples
66348 614c84670c63 Merged revisions 86596 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 58669 diff changeset	301 self.assertEqual(prod, sorted(set(prod)))
614c84670c63 Merged revisions 86596 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 58669 diff changeset	302 self.assertEqual(cwr, sorted(set(cwr)))
614c84670c63 Merged revisions 86596 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 58669 diff changeset	303 self.assertEqual(perm, sorted(set(perm)))
614c84670c63 Merged revisions 86596 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 58669 diff changeset	304 self.assertEqual(comb, sorted(set(comb)))
51114 2254cd3200f0 More exhaustive combinatoric checks. Raymond Hettinger <python@rcn.com> parents: 51108 diff changeset	305
2254cd3200f0 More exhaustive combinatoric checks. Raymond Hettinger <python@rcn.com> parents: 51108 diff changeset	306 # Check interrelationships
66348 614c84670c63 Merged revisions 86596 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 58669 diff changeset	307 self.assertEqual(cwr, [t for t in prod if sorted(t)==list(t)]) # cwr: prods which are sorted
614c84670c63 Merged revisions 86596 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 58669 diff changeset	308 self.assertEqual(perm, [t for t in prod if len(set(t))==r]) # perm: prods with no dups
51114 2254cd3200f0 More exhaustive combinatoric checks. Raymond Hettinger <python@rcn.com> parents: 51108 diff changeset	309 self.assertEqual(comb, [t for t in perm if sorted(t)==list(t)]) # comb: perms that are sorted
2254cd3200f0 More exhaustive combinatoric checks. Raymond Hettinger <python@rcn.com> parents: 51108 diff changeset	310 self.assertEqual(comb, [t for t in cwr if len(set(t))==r]) # comb: cwrs without dups
2254cd3200f0 More exhaustive combinatoric checks. Raymond Hettinger <python@rcn.com> parents: 51108 diff changeset	311 self.assertEqual(comb, filter(set(cwr).__contains__, perm)) # comb: perm that is a cwr
2254cd3200f0 More exhaustive combinatoric checks. Raymond Hettinger <python@rcn.com> parents: 51108 diff changeset	312 self.assertEqual(comb, filter(set(perm).__contains__, cwr)) # comb: cwr that is a perm
2254cd3200f0 More exhaustive combinatoric checks. Raymond Hettinger <python@rcn.com> parents: 51108 diff changeset	313 self.assertEqual(comb, sorted(set(cwr) & set(perm))) # comb: both a cwr and a perm
51106 d170fdf4bdfb Add tests to verify combinatoric relationships. Raymond Hettinger <python@rcn.com> parents: 51097 diff changeset	314
51045 14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	315 def test_compress(self):
51715 748dfe9bb857 Add keyword arg support to itertools.compress(). Raymond Hettinger <python@rcn.com> parents: 51660 diff changeset	316 self.assertEqual(list(compress(data='ABCDEF', selectors=[1,0,1,0,1,1])), list('ACEF'))
51045 14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	317 self.assertEqual(list(compress('ABCDEF', [1,0,1,0,1,1])), list('ACEF'))
14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	318 self.assertEqual(list(compress('ABCDEF', [0,0,0,0,0,0])), list(''))
14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	319 self.assertEqual(list(compress('ABCDEF', [1,1,1,1,1,1])), list('ABCDEF'))
14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	320 self.assertEqual(list(compress('ABCDEF', [1,0,1])), list('AC'))
14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	321 self.assertEqual(list(compress('ABC', [0,1,1,1,1,1])), list('BC'))
14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	322 n = 10000
14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	323 data = chain.from_iterable(repeat(range(6), n))
14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	324 selectors = chain.from_iterable(repeat((0, 1)))
14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	325 self.assertEqual(list(compress(data, selectors)), [1,3,5] * n)
14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	326 self.assertRaises(TypeError, compress, None, range(6)) # 1st arg not iterable
14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	327 self.assertRaises(TypeError, compress, range(6), None) # 2nd arg not iterable
14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	328 self.assertRaises(TypeError, compress, range(6)) # too few args
14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	329 self.assertRaises(TypeError, compress, range(6), None) # too many args
14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	330
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	331 def test_count(self):
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	332 self.assertEqual(zip('abc',count()), [('a', 0), ('b', 1), ('c', 2)])
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	333 self.assertEqual(zip('abc',count(3)), [('a', 3), ('b', 4), ('c', 5)])
29690 72dcc63f4dea More tests Raymond Hettinger <python@rcn.com> parents: 29627 diff changeset	334 self.assertEqual(take(2, zip('abc',count(3))), [('a', 3), ('b', 4)])
43458 333b052e9da9 itertools.count() no longer limited to sys.maxint. Raymond Hettinger <python@rcn.com> parents: 41589 diff changeset	335 self.assertEqual(take(2, zip('abc',count(-1))), [('a', -1), ('b', 0)])
333b052e9da9 itertools.count() no longer limited to sys.maxint. Raymond Hettinger <python@rcn.com> parents: 41589 diff changeset	336 self.assertEqual(take(2, zip('abc',count(-3))), [('a', -3), ('b', -2)])
51541 cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	337 self.assertRaises(TypeError, count, 2, 3, 4)
28945 001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	338 self.assertRaises(TypeError, count, 'a')
43458 333b052e9da9 itertools.count() no longer limited to sys.maxint. Raymond Hettinger <python@rcn.com> parents: 41589 diff changeset	339 self.assertEqual(list(islice(count(maxsize-5), 10)), range(maxsize-5, maxsize+5))
333b052e9da9 itertools.count() no longer limited to sys.maxint. Raymond Hettinger <python@rcn.com> parents: 41589 diff changeset	340 self.assertEqual(list(islice(count(-maxsize-5), 10)), range(-maxsize-5, -maxsize+5))
33616 31b08670ebdd * Increase test coverage. Raymond Hettinger <python@rcn.com> parents: 33597 diff changeset	341 c = count(3)
31b08670ebdd * Increase test coverage. Raymond Hettinger <python@rcn.com> parents: 33597 diff changeset	342 self.assertEqual(repr(c), 'count(3)')
31b08670ebdd * Increase test coverage. Raymond Hettinger <python@rcn.com> parents: 33597 diff changeset	343 c.next()
31b08670ebdd * Increase test coverage. Raymond Hettinger <python@rcn.com> parents: 33597 diff changeset	344 self.assertEqual(repr(c), 'count(4)')
39866 69530aa21b8a * regression bug, count_next was coercing a Py_ssize_t to an unsigned Py_size_t Jack Diederich <jackdied@gmail.com> parents: 39720 diff changeset	345 c = count(-9)
69530aa21b8a * regression bug, count_next was coercing a Py_ssize_t to an unsigned Py_size_t Jack Diederich <jackdied@gmail.com> parents: 39720 diff changeset	346 self.assertEqual(repr(c), 'count(-9)')
69530aa21b8a * regression bug, count_next was coercing a Py_ssize_t to an unsigned Py_size_t Jack Diederich <jackdied@gmail.com> parents: 39720 diff changeset	347 c.next()
51541 cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	348 self.assertEqual(repr(count(10.25)), 'count(10.25)')
39866 69530aa21b8a * regression bug, count_next was coercing a Py_ssize_t to an unsigned Py_size_t Jack Diederich <jackdied@gmail.com> parents: 39720 diff changeset	349 self.assertEqual(c.next(), -8)
43458 333b052e9da9 itertools.count() no longer limited to sys.maxint. Raymond Hettinger <python@rcn.com> parents: 41589 diff changeset	350 for i in (-sys.maxint-5, -sys.maxint+5 ,-10, -1, 0, 10, sys.maxint-5, sys.maxint+5):
43543 fb310b8620ec Fix test of count.__repr__() to ignore the 'L' if the count is a long Raymond Hettinger <python@rcn.com> parents: 43458 diff changeset	351 # Test repr (ignoring the L in longs)
fb310b8620ec Fix test of count.__repr__() to ignore the 'L' if the count is a long Raymond Hettinger <python@rcn.com> parents: 43458 diff changeset	352 r1 = repr(count(i)).replace('L', '')
fb310b8620ec Fix test of count.__repr__() to ignore the 'L' if the count is a long Raymond Hettinger <python@rcn.com> parents: 43458 diff changeset	353 r2 = 'count(%r)'.__mod__(i).replace('L', '')
fb310b8620ec Fix test of count.__repr__() to ignore the 'L' if the count is a long Raymond Hettinger <python@rcn.com> parents: 43458 diff changeset	354 self.assertEqual(r1, r2)
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	355
57517 1ff2c3edc13c Issue #7410: deepcopy of itertools.count() erroneously reset the count. Raymond Hettinger <python@rcn.com> parents: 57033 diff changeset	356 # check copy, deepcopy, pickle
1ff2c3edc13c Issue #7410: deepcopy of itertools.count() erroneously reset the count. Raymond Hettinger <python@rcn.com> parents: 57033 diff changeset	357 for value in -3, 3, sys.maxint-5, sys.maxint+5:
1ff2c3edc13c Issue #7410: deepcopy of itertools.count() erroneously reset the count. Raymond Hettinger <python@rcn.com> parents: 57033 diff changeset	358 c = count(value)
1ff2c3edc13c Issue #7410: deepcopy of itertools.count() erroneously reset the count. Raymond Hettinger <python@rcn.com> parents: 57033 diff changeset	359 self.assertEqual(next(copy.copy(c)), value)
1ff2c3edc13c Issue #7410: deepcopy of itertools.count() erroneously reset the count. Raymond Hettinger <python@rcn.com> parents: 57033 diff changeset	360 self.assertEqual(next(copy.deepcopy(c)), value)
1ff2c3edc13c Issue #7410: deepcopy of itertools.count() erroneously reset the count. Raymond Hettinger <python@rcn.com> parents: 57033 diff changeset	361 self.assertEqual(next(pickle.loads(pickle.dumps(c))), value)
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	362
51541 cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	363 def test_count_with_stride(self):
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	364 self.assertEqual(zip('abc',count(2,3)), [('a', 2), ('b', 5), ('c', 8)])
51622 c5607cf76801 Add keyword argument support to itertools.count(). Raymond Hettinger <python@rcn.com> parents: 51549 diff changeset	365 self.assertEqual(zip('abc',count(start=2,step=3)),
c5607cf76801 Add keyword argument support to itertools.count(). Raymond Hettinger <python@rcn.com> parents: 51549 diff changeset	366 [('a', 2), ('b', 5), ('c', 8)])
51772 3e27d606d625 Fix keyword arguments for itertools.count(). Raymond Hettinger <python@rcn.com> parents: 51724 diff changeset	367 self.assertEqual(zip('abc',count(step=-1)),
3e27d606d625 Fix keyword arguments for itertools.count(). Raymond Hettinger <python@rcn.com> parents: 51724 diff changeset	368 [('a', 0), ('b', -1), ('c', -2)])
51541 cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	369 self.assertEqual(zip('abc',count(2,0)), [('a', 2), ('b', 2), ('c', 2)])
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	370 self.assertEqual(zip('abc',count(2,1)), [('a', 2), ('b', 3), ('c', 4)])
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	371 self.assertEqual(take(20, count(maxsize-15, 3)), take(20, range(maxsize-15, maxsize+100, 3)))
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	372 self.assertEqual(take(20, count(-maxsize-15, 3)), take(20, range(-maxsize-15,-maxsize+100, 3)))
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	373 self.assertEqual(take(3, count(2, 3.25-4j)), [2, 5.25-4j, 8.5-8j])
51547 df69bccdd363 Add an extra testcase. Raymond Hettinger <python@rcn.com> parents: 51541 diff changeset	374 self.assertEqual(take(3, count(Decimal('1.1'), Decimal('.1'))),
df69bccdd363 Add an extra testcase. Raymond Hettinger <python@rcn.com> parents: 51541 diff changeset	375 [Decimal('1.1'), Decimal('1.2'), Decimal('1.3')])
51549 099e960676b9 One more test. Raymond Hettinger <python@rcn.com> parents: 51547 diff changeset	376 self.assertEqual(take(3, count(Fraction(2,3), Fraction(1,7))),
099e960676b9 One more test. Raymond Hettinger <python@rcn.com> parents: 51547 diff changeset	377 [Fraction(2,3), Fraction(17,21), Fraction(20,21)])
51541 cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	378 self.assertEqual(repr(take(3, count(10, 2.5))), repr([10, 12.5, 15.0]))
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	379 c = count(3, 5)
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	380 self.assertEqual(repr(c), 'count(3, 5)')
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	381 c.next()
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	382 self.assertEqual(repr(c), 'count(8, 5)')
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	383 c = count(-9, 0)
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	384 self.assertEqual(repr(c), 'count(-9, 0)')
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	385 c.next()
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	386 self.assertEqual(repr(c), 'count(-9, 0)')
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	387 c = count(-9, -3)
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	388 self.assertEqual(repr(c), 'count(-9, -3)')
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	389 c.next()
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	390 self.assertEqual(repr(c), 'count(-12, -3)')
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	391 self.assertEqual(repr(c), 'count(-12, -3)')
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	392 self.assertEqual(repr(count(10.5, 1.25)), 'count(10.5, 1.25)')
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	393 self.assertEqual(repr(count(10.5, 1)), 'count(10.5)') # suppress step=1 when it's an int
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	394 self.assertEqual(repr(count(10.5, 1.00)), 'count(10.5, 1.0)') # do show float values lilke 1.0
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	395 for i in (-sys.maxint-5, -sys.maxint+5 ,-10, -1, 0, 10, sys.maxint-5, sys.maxint+5):
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	396 for j in (-sys.maxint-5, -sys.maxint+5 ,-10, -1, 0, 1, 10, sys.maxint-5, sys.maxint+5):
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	397 # Test repr (ignoring the L in longs)
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	398 r1 = repr(count(i, j)).replace('L', '')
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	399 if j == 1:
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	400 r2 = ('count(%r)' % i).replace('L', '')
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	401 else:
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	402 r2 = ('count(%r, %r)' % (i, j)).replace('L', '')
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	403 self.assertEqual(r1, r2)
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments. Raymond Hettinger <python@rcn.com> parents: 51312 diff changeset	404
28024 61fa6b55c1de User requested changes to the itertools module. Raymond Hettinger <python@rcn.com> parents: 27769 diff changeset	405 def test_cycle(self):
29690 72dcc63f4dea More tests Raymond Hettinger <python@rcn.com> parents: 29627 diff changeset	406 self.assertEqual(take(10, cycle('abc')), list('abcabcabca'))
28024 61fa6b55c1de User requested changes to the itertools module. Raymond Hettinger <python@rcn.com> parents: 27769 diff changeset	407 self.assertEqual(list(cycle('')), [])
28945 001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	408 self.assertRaises(TypeError, cycle)
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	409 self.assertRaises(TypeError, cycle, 5)
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	410 self.assertEqual(list(islice(cycle(gen3()),10)), [0,1,2,0,1,2,0,1,2,0])
28024 61fa6b55c1de User requested changes to the itertools module. Raymond Hettinger <python@rcn.com> parents: 27769 diff changeset	411
31136 fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	412 def test_groupby(self):
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	413 # Check whether it accepts arguments correctly
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	414 self.assertEqual([], list(groupby([])))
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	415 self.assertEqual([], list(groupby([], key=id)))
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	416 self.assertRaises(TypeError, list, groupby('abc', []))
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	417 self.assertRaises(TypeError, groupby, None)
33616 31b08670ebdd * Increase test coverage. Raymond Hettinger <python@rcn.com> parents: 33597 diff changeset	418 self.assertRaises(TypeError, groupby, 'abc', lambda x:x, 10)
31136 fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	419
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	420 # Check normal input
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	421 s = [(0, 10, 20), (0, 11,21), (0,12,21), (1,13,21), (1,14,22),
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	422 (2,15,22), (3,16,23), (3,17,23)]
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	423 dup = []
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	424 for k, g in groupby(s, lambda r:r[0]):
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	425 for elem in g:
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	426 self.assertEqual(k, elem[0])
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	427 dup.append(elem)
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	428 self.assertEqual(s, dup)
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	429
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	430 # Check nested case
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	431 dup = []
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	432 for k, g in groupby(s, lambda r:r[0]):
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	433 for ik, ig in groupby(g, lambda r:r[2]):
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	434 for elem in ig:
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	435 self.assertEqual(k, elem[0])
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	436 self.assertEqual(ik, elem[2])
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	437 dup.append(elem)
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	438 self.assertEqual(s, dup)
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	439
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	440 # Check case where inner iterator is not used
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	441 keys = [k for k, g in groupby(s, lambda r:r[0])]
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	442 expectedkeys = set([r[0] for r in s])
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	443 self.assertEqual(set(keys), expectedkeys)
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	444 self.assertEqual(len(keys), len(expectedkeys))
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	445
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	446 # Exercise pipes and filters style
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	447 s = 'abracadabra'
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	448 # sort s \| uniq
31210 c06b570adf12 Guido grants a Christmas wish: Raymond Hettinger <python@rcn.com> parents: 31136 diff changeset	449 r = [k for k, g in groupby(sorted(s))]
31136 fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	450 self.assertEqual(r, ['a', 'b', 'c', 'd', 'r'])
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	451 # sort s \| uniq -d
31210 c06b570adf12 Guido grants a Christmas wish: Raymond Hettinger <python@rcn.com> parents: 31136 diff changeset	452 r = [k for k, g in groupby(sorted(s)) if list(islice(g,1,2))]
31136 fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	453 self.assertEqual(r, ['a', 'b', 'r'])
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	454 # sort s \| uniq -c
31210 c06b570adf12 Guido grants a Christmas wish: Raymond Hettinger <python@rcn.com> parents: 31136 diff changeset	455 r = [(len(list(g)), k) for k, g in groupby(sorted(s))]
31136 fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	456 self.assertEqual(r, [(5, 'a'), (2, 'b'), (1, 'c'), (1, 'd'), (2, 'r')])
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	457 # sort s \| uniq -c \| sort -rn \| head -3
31210 c06b570adf12 Guido grants a Christmas wish: Raymond Hettinger <python@rcn.com> parents: 31136 diff changeset	458 r = sorted([(len(list(g)) , k) for k, g in groupby(sorted(s))], reverse=True)[:3]
31136 fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	459 self.assertEqual(r, [(5, 'a'), (2, 'r'), (2, 'b')])
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	460
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	461 # iter.next failure
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	462 class ExpectedError(Exception):
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	463 pass
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	464 def delayed_raise(n=0):
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	465 for i in range(n):
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	466 yield 'yo'
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	467 raise ExpectedError
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	468 def gulp(iterable, keyp=None, func=list):
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	469 return [func(g) for k, g in groupby(iterable, keyp)]
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	470
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	471 # iter.next failure on outer object
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	472 self.assertRaises(ExpectedError, gulp, delayed_raise(0))
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	473 # iter.next failure on inner object
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	474 self.assertRaises(ExpectedError, gulp, delayed_raise(1))
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	475
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	476 # __cmp__ failure
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	477 class DummyCmp:
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	478 def __cmp__(self, dst):
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	479 raise ExpectedError
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	480 s = [DummyCmp(), DummyCmp(), None]
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	481
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	482 # __cmp__ failure on outer object
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	483 self.assertRaises(ExpectedError, gulp, s, func=id)
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	484 # __cmp__ failure on inner object
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	485 self.assertRaises(ExpectedError, gulp, s)
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	486
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	487 # keyfunc failure
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	488 def keyfunc(obj):
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	489 if keyfunc.skip > 0:
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	490 keyfunc.skip -= 1
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	491 return obj
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	492 else:
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	493 raise ExpectedError
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	494
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	495 # keyfunc failure on outer object
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	496 keyfunc.skip = 0
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	497 self.assertRaises(ExpectedError, gulp, [None], keyfunc)
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	498 keyfunc.skip = 1
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	499 self.assertRaises(ExpectedError, gulp, [None, None], keyfunc)
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	500
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	501 def test_ifilter(self):
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	502 self.assertEqual(list(ifilter(isEven, range(6))), [0,2,4])
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	503 self.assertEqual(list(ifilter(None, [0,1,0,2,0])), [1,2])
45524 e81e45f8002e Make sure the itertools filter functions give the same performance for func=bool as func=None. Raymond Hettinger <python@rcn.com> parents: 45438 diff changeset	504 self.assertEqual(list(ifilter(bool, [0,1,0,2,0])), [1,2])
29690 72dcc63f4dea More tests Raymond Hettinger <python@rcn.com> parents: 29627 diff changeset	505 self.assertEqual(take(4, ifilter(isEven, count())), [0,2,4,6])
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	506 self.assertRaises(TypeError, ifilter)
28945 001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	507 self.assertRaises(TypeError, ifilter, lambda x:x)
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	508 self.assertRaises(TypeError, ifilter, lambda x:x, range(6), 7)
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	509 self.assertRaises(TypeError, ifilter, isEven, 3)
28945 001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	510 self.assertRaises(TypeError, ifilter(range(6), range(6)).next)
27769 dc5e1d918055 C Code: Raymond Hettinger <python@rcn.com> parents: 27747 diff changeset	511
dc5e1d918055 C Code: Raymond Hettinger <python@rcn.com> parents: 27747 diff changeset	512 def test_ifilterfalse(self):
dc5e1d918055 C Code: Raymond Hettinger <python@rcn.com> parents: 27747 diff changeset	513 self.assertEqual(list(ifilterfalse(isEven, range(6))), [1,3,5])
dc5e1d918055 C Code: Raymond Hettinger <python@rcn.com> parents: 27747 diff changeset	514 self.assertEqual(list(ifilterfalse(None, [0,1,0,2,0])), [0,0,0])
45524 e81e45f8002e Make sure the itertools filter functions give the same performance for func=bool as func=None. Raymond Hettinger <python@rcn.com> parents: 45438 diff changeset	515 self.assertEqual(list(ifilterfalse(bool, [0,1,0,2,0])), [0,0,0])
29690 72dcc63f4dea More tests Raymond Hettinger <python@rcn.com> parents: 29627 diff changeset	516 self.assertEqual(take(4, ifilterfalse(isEven, count())), [1,3,5,7])
27769 dc5e1d918055 C Code: Raymond Hettinger <python@rcn.com> parents: 27747 diff changeset	517 self.assertRaises(TypeError, ifilterfalse)
28945 001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	518 self.assertRaises(TypeError, ifilterfalse, lambda x:x)
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	519 self.assertRaises(TypeError, ifilterfalse, lambda x:x, range(6), 7)
27769 dc5e1d918055 C Code: Raymond Hettinger <python@rcn.com> parents: 27747 diff changeset	520 self.assertRaises(TypeError, ifilterfalse, isEven, 3)
28945 001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	521 self.assertRaises(TypeError, ifilterfalse(range(6), range(6)).next)
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	522
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	523 def test_izip(self):
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	524 ans = [(x,y) for x, y in izip('abc',count())]
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	525 self.assertEqual(ans, [('a', 0), ('b', 1), ('c', 2)])
28945 001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	526 self.assertEqual(list(izip('abc', range(6))), zip('abc', range(6)))
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	527 self.assertEqual(list(izip('abcdef', range(3))), zip('abcdef', range(3)))
29690 72dcc63f4dea More tests Raymond Hettinger <python@rcn.com> parents: 29627 diff changeset	528 self.assertEqual(take(3,izip('abcdef', count())), zip('abcdef', range(3)))
28945 001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	529 self.assertEqual(list(izip('abcdef')), zip('abcdef'))
30093 0ac4396b1894 Modified itertools.izip() to match the behavior of __builtin__.zip() Raymond Hettinger <python@rcn.com> parents: 30092 diff changeset	530 self.assertEqual(list(izip()), zip())
28945 001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	531 self.assertRaises(TypeError, izip, 3)
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	532 self.assertRaises(TypeError, izip, range(3), 3)
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	533 self.assertEqual([tuple(list(pair)) for pair in izip('abc', 'def')],
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	534 zip('abc', 'def'))
29303 e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	535 self.assertEqual([pair for pair in izip('abc', 'def')],
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	536 zip('abc', 'def'))
71399 5c8a84ab86f2 Backport 2eb8789e30e7. Alex Gaynor <alex.gaynor@gmail.com> parents: 68588 diff changeset	537
5c8a84ab86f2 Backport 2eb8789e30e7. Alex Gaynor <alex.gaynor@gmail.com> parents: 68588 diff changeset	538 @test_support.impl_detail("tuple reuse is specific to CPython")
5c8a84ab86f2 Backport 2eb8789e30e7. Alex Gaynor <alex.gaynor@gmail.com> parents: 68588 diff changeset	539 def test_izip_tuple_resuse(self):
28945 001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	540 ids = map(id, izip('abc', 'def'))
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	541 self.assertEqual(min(ids), max(ids))
29303 e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	542 ids = map(id, list(izip('abc', 'def')))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	543 self.assertEqual(len(dict.fromkeys(ids)), len(ids))
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	544
40877 6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	545 def test_iziplongest(self):
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	546 for args in [
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	547 ['abc', range(6)],
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	548 [range(6), 'abc'],
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	549 [range(1000), range(2000,2100), range(3000,3050)],
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	550 [range(1000), range(0), range(3000,3050), range(1200), range(1500)],
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	551 [range(1000), range(0), range(3000,3050), range(1200), range(1500), range(0)],
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	552 ]:
63556 dba99828d91c Merged revisions 77942,79023 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 57517 diff changeset	553 # target = map(None, *args) <- this raises a py3k warning
dba99828d91c Merged revisions 77942,79023 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 57517 diff changeset	554 # this is the replacement:
dba99828d91c Merged revisions 77942,79023 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 57517 diff changeset	555 target = [tuple([arg[i] if i < len(arg) else None for arg in args])
dba99828d91c Merged revisions 77942,79023 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 57517 diff changeset	556 for i in range(max(map(len, args)))]
40877 6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	557 self.assertEqual(list(izip_longest(*args)), target)
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	558 self.assertEqual(list(izip_longest(args, *{})), target)
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	559 target = [tuple((e is None and 'X' or e) for e in t) for t in target] # Replace None fills with 'X'
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	560 self.assertEqual(list(izip_longest(args, *dict(fillvalue='X'))), target)
41133 01355124ce40 Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 40877 diff changeset	561
40877 6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	562 self.assertEqual(take(3,izip_longest('abcdef', count())), zip('abcdef', range(3))) # take 3 from infinite input
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	563
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	564 self.assertEqual(list(izip_longest()), zip())
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	565 self.assertEqual(list(izip_longest([])), zip([]))
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	566 self.assertEqual(list(izip_longest('abcdef')), zip('abcdef'))
41133 01355124ce40 Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 40877 diff changeset	567
63556 dba99828d91c Merged revisions 77942,79023 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 57517 diff changeset	568 self.assertEqual(list(izip_longest('abc', 'defg', **{})),
dba99828d91c Merged revisions 77942,79023 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 57517 diff changeset	569 zip(list('abc') + [None], 'defg')) # empty keyword dict
40877 6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	570 self.assertRaises(TypeError, izip_longest, 3)
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	571 self.assertRaises(TypeError, izip_longest, range(3), 3)
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	572
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	573 for stmt in [
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	574 "izip_longest('abc', fv=1)",
41133 01355124ce40 Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 40877 diff changeset	575 "izip_longest('abc', fillvalue=1, bogus_keyword=None)",
40877 6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	576 ]:
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	577 try:
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	578 eval(stmt, globals(), locals())
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	579 except TypeError:
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	580 pass
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	581 else:
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	582 self.fail('Did not raise Type in: ' + stmt)
41133 01355124ce40 Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 40877 diff changeset	583
40877 6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	584 self.assertEqual([tuple(list(pair)) for pair in izip_longest('abc', 'def')],
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	585 zip('abc', 'def'))
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	586 self.assertEqual([pair for pair in izip_longest('abc', 'def')],
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	587 zip('abc', 'def'))
71399 5c8a84ab86f2 Backport 2eb8789e30e7. Alex Gaynor <alex.gaynor@gmail.com> parents: 68588 diff changeset	588
5c8a84ab86f2 Backport 2eb8789e30e7. Alex Gaynor <alex.gaynor@gmail.com> parents: 68588 diff changeset	589 @test_support.impl_detail("tuple reuse is specific to CPython")
5c8a84ab86f2 Backport 2eb8789e30e7. Alex Gaynor <alex.gaynor@gmail.com> parents: 68588 diff changeset	590 def test_izip_longest_tuple_reuse(self):
40877 6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	591 ids = map(id, izip_longest('abc', 'def'))
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	592 self.assertEqual(min(ids), max(ids))
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	593 ids = map(id, list(izip_longest('abc', 'def')))
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	594 self.assertEqual(len(dict.fromkeys(ids)), len(ids))
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	595
57022 02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	596 def test_bug_7244(self):
02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	597
02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	598 class Repeater(object):
02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	599 # this class is similar to itertools.repeat
02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	600 def __init__(self, o, t, e):
02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	601 self.o = o
02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	602 self.t = int(t)
02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	603 self.e = e
02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	604 def __iter__(self): # its iterator is itself
02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	605 return self
02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	606 def next(self):
02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	607 if self.t > 0:
02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	608 self.t -= 1
02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	609 return self.o
02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	610 else:
02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	611 raise self.e
02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	612
02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	613 # Formerly this code in would fail in debug mode
02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	614 # with Undetected Error and Stop Iteration
02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	615 r1 = Repeater(1, 3, StopIteration)
02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	616 r2 = Repeater(2, 4, StopIteration)
02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	617 def run(r1, r2):
02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	618 result = []
02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	619 for i, j in izip_longest(r1, r2, fillvalue=0):
57033 ed166ff7d952 Issue 7244: Fix indentation in C code. Fix test to not sent output to stdout. Raymond Hettinger <python@rcn.com> parents: 57022 diff changeset	620 with test_support.captured_output('stdout'):
ed166ff7d952 Issue 7244: Fix indentation in C code. Fix test to not sent output to stdout. Raymond Hettinger <python@rcn.com> parents: 57022 diff changeset	621 print (i, j)
57022 02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	622 result.append((i, j))
02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	623 return result
02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	624 self.assertEqual(run(r1, r2), [(1,2), (1,2), (1,2), (0,2)])
02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	625
02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	626 # Formerly, the RuntimeError would be lost
02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	627 # and StopIteration would stop as expected
02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	628 r1 = Repeater(1, 3, RuntimeError)
02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	629 r2 = Repeater(2, 4, StopIteration)
57033 ed166ff7d952 Issue 7244: Fix indentation in C code. Fix test to not sent output to stdout. Raymond Hettinger <python@rcn.com> parents: 57022 diff changeset	630 it = izip_longest(r1, r2, fillvalue=0)
ed166ff7d952 Issue 7244: Fix indentation in C code. Fix test to not sent output to stdout. Raymond Hettinger <python@rcn.com> parents: 57022 diff changeset	631 self.assertEqual(next(it), (1, 2))
ed166ff7d952 Issue 7244: Fix indentation in C code. Fix test to not sent output to stdout. Raymond Hettinger <python@rcn.com> parents: 57022 diff changeset	632 self.assertEqual(next(it), (1, 2))
ed166ff7d952 Issue 7244: Fix indentation in C code. Fix test to not sent output to stdout. Raymond Hettinger <python@rcn.com> parents: 57022 diff changeset	633 self.assertEqual(next(it), (1, 2))
ed166ff7d952 Issue 7244: Fix indentation in C code. Fix test to not sent output to stdout. Raymond Hettinger <python@rcn.com> parents: 57022 diff changeset	634 self.assertRaises(RuntimeError, next, it)
57022 02f5c6008327 Issue 7244: fix exception handling in itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 51725 diff changeset	635
45425 3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming. Raymond Hettinger <python@rcn.com> parents: 44717 diff changeset	636 def test_product(self):
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming. Raymond Hettinger <python@rcn.com> parents: 44717 diff changeset	637 for args, result in [
45651 e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	638 ([], [()]), # zero iterables
45425 3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming. Raymond Hettinger <python@rcn.com> parents: 44717 diff changeset	639 (['ab'], [('a',), ('b',)]), # one iterable
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming. Raymond Hettinger <python@rcn.com> parents: 44717 diff changeset	640 ([range(2), range(3)], [(0,0), (0,1), (0,2), (1,0), (1,1), (1,2)]), # two iterables
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming. Raymond Hettinger <python@rcn.com> parents: 44717 diff changeset	641 ([range(0), range(2), range(3)], []), # first iterable with zero length
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming. Raymond Hettinger <python@rcn.com> parents: 44717 diff changeset	642 ([range(2), range(0), range(3)], []), # middle iterable with zero length
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming. Raymond Hettinger <python@rcn.com> parents: 44717 diff changeset	643 ([range(2), range(3), range(0)], []), # last iterable with zero length
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming. Raymond Hettinger <python@rcn.com> parents: 44717 diff changeset	644 ]:
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming. Raymond Hettinger <python@rcn.com> parents: 44717 diff changeset	645 self.assertEqual(list(product(*args)), result)
45567 10962b3f77a9 Handle the repeat keyword argument for itertools.product(). Raymond Hettinger <python@rcn.com> parents: 45563 diff changeset	646 for r in range(4):
10962b3f77a9 Handle the repeat keyword argument for itertools.product(). Raymond Hettinger <python@rcn.com> parents: 45563 diff changeset	647 self.assertEqual(list(product((argsr))),
10962b3f77a9 Handle the repeat keyword argument for itertools.product(). Raymond Hettinger <python@rcn.com> parents: 45563 diff changeset	648 list(product(args, *dict(repeat=r))))
45425 3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming. Raymond Hettinger <python@rcn.com> parents: 44717 diff changeset	649 self.assertEqual(len(list(product([range(7)]6))), 7**6)
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming. Raymond Hettinger <python@rcn.com> parents: 44717 diff changeset	650 self.assertRaises(TypeError, product, range(6), None)
45675 c197e18449b4 C implementation of itertools.permutations(). Raymond Hettinger <python@rcn.com> parents: 45651 diff changeset	651
45701 5f49b569dedf Tweak recipes and tests Raymond Hettinger <python@rcn.com> parents: 45699 diff changeset	652 def product1(args, *kwds):
5f49b569dedf Tweak recipes and tests Raymond Hettinger <python@rcn.com> parents: 45699 diff changeset	653 pools = map(tuple, args) * kwds.get('repeat', 1)
5f49b569dedf Tweak recipes and tests Raymond Hettinger <python@rcn.com> parents: 45699 diff changeset	654 n = len(pools)
5f49b569dedf Tweak recipes and tests Raymond Hettinger <python@rcn.com> parents: 45699 diff changeset	655 if n == 0:
5f49b569dedf Tweak recipes and tests Raymond Hettinger <python@rcn.com> parents: 45699 diff changeset	656 yield ()
5f49b569dedf Tweak recipes and tests Raymond Hettinger <python@rcn.com> parents: 45699 diff changeset	657 return
5f49b569dedf Tweak recipes and tests Raymond Hettinger <python@rcn.com> parents: 45699 diff changeset	658 if any(len(pool) == 0 for pool in pools):
5f49b569dedf Tweak recipes and tests Raymond Hettinger <python@rcn.com> parents: 45699 diff changeset	659 return
5f49b569dedf Tweak recipes and tests Raymond Hettinger <python@rcn.com> parents: 45699 diff changeset	660 indices = [0] * n
5f49b569dedf Tweak recipes and tests Raymond Hettinger <python@rcn.com> parents: 45699 diff changeset	661 yield tuple(pool[i] for pool, i in zip(pools, indices))
5f49b569dedf Tweak recipes and tests Raymond Hettinger <python@rcn.com> parents: 45699 diff changeset	662 while 1:
5f49b569dedf Tweak recipes and tests Raymond Hettinger <python@rcn.com> parents: 45699 diff changeset	663 for i in reversed(range(n)): # right to left
5f49b569dedf Tweak recipes and tests Raymond Hettinger <python@rcn.com> parents: 45699 diff changeset	664 if indices[i] == len(pools[i]) - 1:
5f49b569dedf Tweak recipes and tests Raymond Hettinger <python@rcn.com> parents: 45699 diff changeset	665 continue
5f49b569dedf Tweak recipes and tests Raymond Hettinger <python@rcn.com> parents: 45699 diff changeset	666 indices[i] += 1
5f49b569dedf Tweak recipes and tests Raymond Hettinger <python@rcn.com> parents: 45699 diff changeset	667 for j in range(i+1, n):
5f49b569dedf Tweak recipes and tests Raymond Hettinger <python@rcn.com> parents: 45699 diff changeset	668 indices[j] = 0
5f49b569dedf Tweak recipes and tests Raymond Hettinger <python@rcn.com> parents: 45699 diff changeset	669 yield tuple(pool[i] for pool, i in zip(pools, indices))
5f49b569dedf Tweak recipes and tests Raymond Hettinger <python@rcn.com> parents: 45699 diff changeset	670 break
5f49b569dedf Tweak recipes and tests Raymond Hettinger <python@rcn.com> parents: 45699 diff changeset	671 else:
5f49b569dedf Tweak recipes and tests Raymond Hettinger <python@rcn.com> parents: 45699 diff changeset	672 return
5f49b569dedf Tweak recipes and tests Raymond Hettinger <python@rcn.com> parents: 45699 diff changeset	673
45675 c197e18449b4 C implementation of itertools.permutations(). Raymond Hettinger <python@rcn.com> parents: 45651 diff changeset	674 def product2(args, *kwds):
c197e18449b4 C implementation of itertools.permutations(). Raymond Hettinger <python@rcn.com> parents: 45651 diff changeset	675 'Pure python version used in docs'
c197e18449b4 C implementation of itertools.permutations(). Raymond Hettinger <python@rcn.com> parents: 45651 diff changeset	676 pools = map(tuple, args) * kwds.get('repeat', 1)
c197e18449b4 C implementation of itertools.permutations(). Raymond Hettinger <python@rcn.com> parents: 45651 diff changeset	677 result = [[]]
c197e18449b4 C implementation of itertools.permutations(). Raymond Hettinger <python@rcn.com> parents: 45651 diff changeset	678 for pool in pools:
c197e18449b4 C implementation of itertools.permutations(). Raymond Hettinger <python@rcn.com> parents: 45651 diff changeset	679 result = [x+[y] for x in result for y in pool]
c197e18449b4 C implementation of itertools.permutations(). Raymond Hettinger <python@rcn.com> parents: 45651 diff changeset	680 for prod in result:
c197e18449b4 C implementation of itertools.permutations(). Raymond Hettinger <python@rcn.com> parents: 45651 diff changeset	681 yield tuple(prod)
c197e18449b4 C implementation of itertools.permutations(). Raymond Hettinger <python@rcn.com> parents: 45651 diff changeset	682
45425 3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming. Raymond Hettinger <python@rcn.com> parents: 44717 diff changeset	683 argtypes = ['', 'abc', '', xrange(0), xrange(4), dict(a=1, b=2, c=3),
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming. Raymond Hettinger <python@rcn.com> parents: 44717 diff changeset	684 set('abcdefg'), range(11), tuple(range(13))]
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming. Raymond Hettinger <python@rcn.com> parents: 44717 diff changeset	685 for i in range(100):
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming. Raymond Hettinger <python@rcn.com> parents: 44717 diff changeset	686 args = [random.choice(argtypes) for j in range(random.randrange(5))]
45651 e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	687 expected_len = prod(map(len, args))
e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	688 self.assertEqual(len(list(product(*args))), expected_len)
45701 5f49b569dedf Tweak recipes and tests Raymond Hettinger <python@rcn.com> parents: 45699 diff changeset	689 self.assertEqual(list(product(args)), list(product1(args)))
45675 c197e18449b4 C implementation of itertools.permutations(). Raymond Hettinger <python@rcn.com> parents: 45651 diff changeset	690 self.assertEqual(list(product(args)), list(product2(args)))
45425 3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming. Raymond Hettinger <python@rcn.com> parents: 44717 diff changeset	691 args = map(iter, args)
45651 e44c745bec0b Beef-up docs and tests for itertools. Fix-up end-case for product(). Raymond Hettinger <python@rcn.com> parents: 45567 diff changeset	692 self.assertEqual(len(list(product(*args))), expected_len)
45425 3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming. Raymond Hettinger <python@rcn.com> parents: 44717 diff changeset	693
71399 5c8a84ab86f2 Backport 2eb8789e30e7. Alex Gaynor <alex.gaynor@gmail.com> parents: 68588 diff changeset	694 @test_support.impl_detail("tuple reuse is specific to CPython")
5c8a84ab86f2 Backport 2eb8789e30e7. Alex Gaynor <alex.gaynor@gmail.com> parents: 68588 diff changeset	695 def test_product_tuple_reuse(self):
45438 11a73fbbf86f Improve the implementation of itertools.product() Raymond Hettinger <python@rcn.com> parents: 45425 diff changeset	696 self.assertEqual(len(set(map(id, product('abc', 'def')))), 1)
11a73fbbf86f Improve the implementation of itertools.product() Raymond Hettinger <python@rcn.com> parents: 45425 diff changeset	697 self.assertNotEqual(len(set(map(id, list(product('abc', 'def'))))), 1)
45425 3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming. Raymond Hettinger <python@rcn.com> parents: 44717 diff changeset	698
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	699 def test_repeat(self):
51718 d25fc0209295 Add keyword arg support to itertools.repeat(). Raymond Hettinger <python@rcn.com> parents: 51715 diff changeset	700 self.assertEqual(list(repeat(object='a', times=3)), ['a', 'a', 'a'])
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	701 self.assertEqual(zip(xrange(3),repeat('a')),
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	702 [(0, 'a'), (1, 'a'), (2, 'a')])
28024 61fa6b55c1de User requested changes to the itertools module. Raymond Hettinger <python@rcn.com> parents: 27769 diff changeset	703 self.assertEqual(list(repeat('a', 3)), ['a', 'a', 'a'])
29690 72dcc63f4dea More tests Raymond Hettinger <python@rcn.com> parents: 29627 diff changeset	704 self.assertEqual(take(3, repeat('a')), ['a', 'a', 'a'])
28945 001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	705 self.assertEqual(list(repeat('a', 0)), [])
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	706 self.assertEqual(list(repeat('a', -3)), [])
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	707 self.assertRaises(TypeError, repeat)
28945 001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	708 self.assertRaises(TypeError, repeat, None, 3, 4)
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	709 self.assertRaises(TypeError, repeat, None, 'a')
33616 31b08670ebdd * Increase test coverage. Raymond Hettinger <python@rcn.com> parents: 33597 diff changeset	710 r = repeat(1+0j)
31b08670ebdd * Increase test coverage. Raymond Hettinger <python@rcn.com> parents: 33597 diff changeset	711 self.assertEqual(repr(r), 'repeat((1+0j))')
31b08670ebdd * Increase test coverage. Raymond Hettinger <python@rcn.com> parents: 33597 diff changeset	712 r = repeat(1+0j, 5)
31b08670ebdd * Increase test coverage. Raymond Hettinger <python@rcn.com> parents: 33597 diff changeset	713 self.assertEqual(repr(r), 'repeat((1+0j), 5)')
31b08670ebdd * Increase test coverage. Raymond Hettinger <python@rcn.com> parents: 33597 diff changeset	714 list(r)
31b08670ebdd * Increase test coverage. Raymond Hettinger <python@rcn.com> parents: 33597 diff changeset	715 self.assertEqual(repr(r), 'repeat((1+0j), 0)')
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	716
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	717 def test_imap(self):
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	718 self.assertEqual(list(imap(operator.pow, range(3), range(1,7))),
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	719 [01, 12, 2**3])
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	720 self.assertEqual(list(imap(None, 'abc', range(5))),
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	721 [('a',0),('b',1),('c',2)])
29690 72dcc63f4dea More tests Raymond Hettinger <python@rcn.com> parents: 29627 diff changeset	722 self.assertEqual(list(imap(None, 'abc', count())),
72dcc63f4dea More tests Raymond Hettinger <python@rcn.com> parents: 29627 diff changeset	723 [('a',0),('b',1),('c',2)])
72dcc63f4dea More tests Raymond Hettinger <python@rcn.com> parents: 29627 diff changeset	724 self.assertEqual(take(2,imap(None, 'abc', count())),
72dcc63f4dea More tests Raymond Hettinger <python@rcn.com> parents: 29627 diff changeset	725 [('a',0),('b',1)])
28945 001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	726 self.assertEqual(list(imap(operator.pow, [])), [])
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	727 self.assertRaises(TypeError, imap)
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	728 self.assertRaises(TypeError, imap, operator.neg)
28945 001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	729 self.assertRaises(TypeError, imap(10, range(5)).next)
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	730 self.assertRaises(ValueError, imap(errfunc, [4], [5]).next)
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	731 self.assertRaises(TypeError, imap(onearg, [4], [5]).next)
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	732
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	733 def test_starmap(self):
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	734 self.assertEqual(list(starmap(operator.pow, zip(range(3), range(1,7)))),
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	735 [01, 12, 2**3])
29690 72dcc63f4dea More tests Raymond Hettinger <python@rcn.com> parents: 29627 diff changeset	736 self.assertEqual(take(3, starmap(operator.pow, izip(count(), count(1)))),
72dcc63f4dea More tests Raymond Hettinger <python@rcn.com> parents: 29627 diff changeset	737 [01, 12, 2**3])
28945 001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	738 self.assertEqual(list(starmap(operator.pow, [])), [])
44717 d0f7963cf8b0 Make starmap() match its pure python definition and accept any itertable input (not just tuples). Raymond Hettinger <python@rcn.com> parents: 43543 diff changeset	739 self.assertEqual(list(starmap(operator.pow, [iter([4,5])])), [4**5])
d0f7963cf8b0 Make starmap() match its pure python definition and accept any itertable input (not just tuples). Raymond Hettinger <python@rcn.com> parents: 43543 diff changeset	740 self.assertRaises(TypeError, list, starmap(operator.pow, [None]))
28945 001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	741 self.assertRaises(TypeError, starmap)
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	742 self.assertRaises(TypeError, starmap, operator.pow, [(4,5)], 'extra')
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	743 self.assertRaises(TypeError, starmap(10, [(4,5)]).next)
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	744 self.assertRaises(ValueError, starmap(errfunc, [(4,5)]).next)
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	745 self.assertRaises(TypeError, starmap(onearg, [(4,5)]).next)
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	746
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	747 def test_islice(self):
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	748 for args in [ # islice(args) should agree with range(args)
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	749 (10, 20, 3),
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	750 (10, 3, 20),
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	751 (10, 20),
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	752 (10, 3),
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	753 (20,)
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	754 ]:
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	755 self.assertEqual(list(islice(xrange(100), args)), range(args))
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	756
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	757 for args, tgtargs in [ # Stop when seqn is exhausted
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	758 ((10, 110, 3), ((10, 100, 3))),
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	759 ((10, 110), ((10, 100))),
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	760 ((110,), (100,))
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	761 ]:
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	762 self.assertEqual(list(islice(xrange(100), args)), range(tgtargs))
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	763
28929 92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	764 # Test stop=None
92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	765 self.assertEqual(list(islice(xrange(10), None)), range(10))
34108 1d1d6377acb1 Added optional None arguments to itertools.islice(). Raymond Hettinger <python@rcn.com> parents: 33777 diff changeset	766 self.assertEqual(list(islice(xrange(10), None, None)), range(10))
1d1d6377acb1 Added optional None arguments to itertools.islice(). Raymond Hettinger <python@rcn.com> parents: 33777 diff changeset	767 self.assertEqual(list(islice(xrange(10), None, None, None)), range(10))
28929 92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	768 self.assertEqual(list(islice(xrange(10), 2, None)), range(2, 10))
92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	769 self.assertEqual(list(islice(xrange(10), 1, None, 2)), range(1, 10, 2))
92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	770
34814 a412638950a1 SF patch #1171417: bug fix for islice() in docs Raymond Hettinger <python@rcn.com> parents: 34738 diff changeset	771 # Test number of items consumed SF #1171417
a412638950a1 SF patch #1171417: bug fix for islice() in docs Raymond Hettinger <python@rcn.com> parents: 34738 diff changeset	772 it = iter(range(10))
a412638950a1 SF patch #1171417: bug fix for islice() in docs Raymond Hettinger <python@rcn.com> parents: 34738 diff changeset	773 self.assertEqual(list(islice(it, 3)), range(3))
a412638950a1 SF patch #1171417: bug fix for islice() in docs Raymond Hettinger <python@rcn.com> parents: 34738 diff changeset	774 self.assertEqual(list(it), range(3, 10))
a412638950a1 SF patch #1171417: bug fix for islice() in docs Raymond Hettinger <python@rcn.com> parents: 34738 diff changeset	775
28929 92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	776 # Test invalid arguments
28930 18082b2d2ebd The previous made the stop argument optional. Raymond Hettinger <python@rcn.com> parents: 28929 diff changeset	777 self.assertRaises(TypeError, islice, xrange(10))
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	778 self.assertRaises(TypeError, islice, xrange(10), 1, 2, 3, 4)
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	779 self.assertRaises(ValueError, islice, xrange(10), -5, 10, 1)
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	780 self.assertRaises(ValueError, islice, xrange(10), 1, -5, -1)
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	781 self.assertRaises(ValueError, islice, xrange(10), 1, 10, -1)
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	782 self.assertRaises(ValueError, islice, xrange(10), 1, 10, 0)
28929 92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	783 self.assertRaises(ValueError, islice, xrange(10), 'a')
92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	784 self.assertRaises(ValueError, islice, xrange(10), 'a', 1)
92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	785 self.assertRaises(ValueError, islice, xrange(10), 1, 'a')
92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	786 self.assertRaises(ValueError, islice, xrange(10), 'a', 1, 1)
92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	787 self.assertRaises(ValueError, islice, xrange(10), 1, 'a', 1)
41633 5d0969167f6d Merging change 55102 from the trunk: Kristján Valur Jónsson <kristjan@ccpgames.com> parents: 40766 diff changeset	788 self.assertEqual(len(list(islice(count(), 1, 10, maxsize))), 1)
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	789
66549 ed4bfb75d28d Issue #10323: Predictable final state for slice(). Raymond Hettinger <python@rcn.com> parents: 66348 diff changeset	790 # Issue #10323: Less islice in a predictable state
ed4bfb75d28d Issue #10323: Predictable final state for slice(). Raymond Hettinger <python@rcn.com> parents: 66348 diff changeset	791 c = count()
ed4bfb75d28d Issue #10323: Predictable final state for slice(). Raymond Hettinger <python@rcn.com> parents: 66348 diff changeset	792 self.assertEqual(list(islice(c, 1, 3, 50)), [1])
ed4bfb75d28d Issue #10323: Predictable final state for slice(). Raymond Hettinger <python@rcn.com> parents: 66348 diff changeset	793 self.assertEqual(next(c), 3)
ed4bfb75d28d Issue #10323: Predictable final state for slice(). Raymond Hettinger <python@rcn.com> parents: 66348 diff changeset	794
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	795 def test_takewhile(self):
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	796 data = [1, 3, 5, 20, 2, 4, 6, 8]
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	797 underten = lambda x: x<10
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	798 self.assertEqual(list(takewhile(underten, data)), [1, 3, 5])
28945 001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	799 self.assertEqual(list(takewhile(underten, [])), [])
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	800 self.assertRaises(TypeError, takewhile)
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	801 self.assertRaises(TypeError, takewhile, operator.pow)
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	802 self.assertRaises(TypeError, takewhile, operator.pow, [(4,5)], 'extra')
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	803 self.assertRaises(TypeError, takewhile(10, [(4,5)]).next)
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	804 self.assertRaises(ValueError, takewhile(errfunc, [(4,5)]).next)
33616 31b08670ebdd * Increase test coverage. Raymond Hettinger <python@rcn.com> parents: 33597 diff changeset	805 t = takewhile(bool, [1, 1, 1, 0, 0, 0])
31b08670ebdd * Increase test coverage. Raymond Hettinger <python@rcn.com> parents: 33597 diff changeset	806 self.assertEqual(list(t), [1, 1, 1])
31b08670ebdd * Increase test coverage. Raymond Hettinger <python@rcn.com> parents: 33597 diff changeset	807 self.assertRaises(StopIteration, t.next)
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	808
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	809 def test_dropwhile(self):
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	810 data = [1, 3, 5, 20, 2, 4, 6, 8]
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	811 underten = lambda x: x<10
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	812 self.assertEqual(list(dropwhile(underten, data)), [20, 2, 4, 6, 8])
28945 001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	813 self.assertEqual(list(dropwhile(underten, [])), [])
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	814 self.assertRaises(TypeError, dropwhile)
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	815 self.assertRaises(TypeError, dropwhile, operator.pow)
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	816 self.assertRaises(TypeError, dropwhile, operator.pow, [(4,5)], 'extra')
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	817 self.assertRaises(TypeError, dropwhile(10, [(4,5)]).next)
001a90555780 * Added a substantial number of edge case and argument tests for Raymond Hettinger <python@rcn.com> parents: 28936 diff changeset	818 self.assertRaises(ValueError, dropwhile(errfunc, [(4,5)]).next)
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	819
30764 b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	820 def test_tee(self):
30900 3096fab2a19c Improve the implementation of itertools.tee(). Raymond Hettinger <python@rcn.com> parents: 30787 diff changeset	821 n = 200
30764 b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	822 def irange(n):
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	823 for i in xrange(n):
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	824 yield i
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	825
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	826 a, b = tee([]) # test empty iterator
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	827 self.assertEqual(list(a), [])
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	828 self.assertEqual(list(b), [])
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	829
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	830 a, b = tee(irange(n)) # test 100% interleaved
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	831 self.assertEqual(zip(a,b), zip(range(n),range(n)))
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	832
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	833 a, b = tee(irange(n)) # test 0% interleaved
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	834 self.assertEqual(list(a), range(n))
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	835 self.assertEqual(list(b), range(n))
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	836
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	837 a, b = tee(irange(n)) # test dealloc of leading iterator
30900 3096fab2a19c Improve the implementation of itertools.tee(). Raymond Hettinger <python@rcn.com> parents: 30787 diff changeset	838 for i in xrange(100):
3096fab2a19c Improve the implementation of itertools.tee(). Raymond Hettinger <python@rcn.com> parents: 30787 diff changeset	839 self.assertEqual(a.next(), i)
30764 b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	840 del a
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	841 self.assertEqual(list(b), range(n))
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	842
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	843 a, b = tee(irange(n)) # test dealloc of trailing iterator
30900 3096fab2a19c Improve the implementation of itertools.tee(). Raymond Hettinger <python@rcn.com> parents: 30787 diff changeset	844 for i in xrange(100):
3096fab2a19c Improve the implementation of itertools.tee(). Raymond Hettinger <python@rcn.com> parents: 30787 diff changeset	845 self.assertEqual(a.next(), i)
30764 b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	846 del b
30900 3096fab2a19c Improve the implementation of itertools.tee(). Raymond Hettinger <python@rcn.com> parents: 30787 diff changeset	847 self.assertEqual(list(a), range(100, n))
30764 b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	848
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	849 for j in xrange(5): # test randomly interleaved
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	850 order = [0]n + [1]n
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	851 random.shuffle(order)
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	852 lists = ([], [])
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	853 its = tee(irange(n))
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	854 for i in order:
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	855 value = its[i].next()
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	856 lists[i].append(value)
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	857 self.assertEqual(lists[0], range(n))
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	858 self.assertEqual(lists[1], range(n))
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	859
30900 3096fab2a19c Improve the implementation of itertools.tee(). Raymond Hettinger <python@rcn.com> parents: 30787 diff changeset	860 # test argument format checking
30764 b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	861 self.assertRaises(TypeError, tee)
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	862 self.assertRaises(TypeError, tee, 3)
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	863 self.assertRaises(TypeError, tee, [1,2], 'x')
30900 3096fab2a19c Improve the implementation of itertools.tee(). Raymond Hettinger <python@rcn.com> parents: 30787 diff changeset	864 self.assertRaises(TypeError, tee, [1,2], 3, 'x')
30764 b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	865
30900 3096fab2a19c Improve the implementation of itertools.tee(). Raymond Hettinger <python@rcn.com> parents: 30787 diff changeset	866 # tee object should be instantiable
3096fab2a19c Improve the implementation of itertools.tee(). Raymond Hettinger <python@rcn.com> parents: 30787 diff changeset	867 a, b = tee('abc')
3096fab2a19c Improve the implementation of itertools.tee(). Raymond Hettinger <python@rcn.com> parents: 30787 diff changeset	868 c = type(a)('def')
3096fab2a19c Improve the implementation of itertools.tee(). Raymond Hettinger <python@rcn.com> parents: 30787 diff changeset	869 self.assertEqual(list(c), list('def'))
30786 225d848a5f96 Minor improvements to itertools.tee(): Raymond Hettinger <python@rcn.com> parents: 30764 diff changeset	870
30900 3096fab2a19c Improve the implementation of itertools.tee(). Raymond Hettinger <python@rcn.com> parents: 30787 diff changeset	871 # test long-lagged and multi-way split
3096fab2a19c Improve the implementation of itertools.tee(). Raymond Hettinger <python@rcn.com> parents: 30787 diff changeset	872 a, b, c = tee(xrange(2000), 3)
3096fab2a19c Improve the implementation of itertools.tee(). Raymond Hettinger <python@rcn.com> parents: 30787 diff changeset	873 for i in xrange(100):
3096fab2a19c Improve the implementation of itertools.tee(). Raymond Hettinger <python@rcn.com> parents: 30787 diff changeset	874 self.assertEqual(a.next(), i)
3096fab2a19c Improve the implementation of itertools.tee(). Raymond Hettinger <python@rcn.com> parents: 30787 diff changeset	875 self.assertEqual(list(b), range(2000))
3096fab2a19c Improve the implementation of itertools.tee(). Raymond Hettinger <python@rcn.com> parents: 30787 diff changeset	876 self.assertEqual([c.next(), c.next()], range(2))
3096fab2a19c Improve the implementation of itertools.tee(). Raymond Hettinger <python@rcn.com> parents: 30787 diff changeset	877 self.assertEqual(list(a), range(100,2000))
3096fab2a19c Improve the implementation of itertools.tee(). Raymond Hettinger <python@rcn.com> parents: 30787 diff changeset	878 self.assertEqual(list(c), range(2,2000))
3096fab2a19c Improve the implementation of itertools.tee(). Raymond Hettinger <python@rcn.com> parents: 30787 diff changeset	879
33616 31b08670ebdd * Increase test coverage. Raymond Hettinger <python@rcn.com> parents: 33597 diff changeset	880 # test values of n
31b08670ebdd * Increase test coverage. Raymond Hettinger <python@rcn.com> parents: 33597 diff changeset	881 self.assertRaises(TypeError, tee, 'abc', 'invalid')
39720 1352ad9afcc0 Bug #1550714: fix SystemError from itertools.tee on negative value for n. Neal Norwitz <nnorwitz@gmail.com> parents: 38464 diff changeset	882 self.assertRaises(ValueError, tee, [], -1)
33616 31b08670ebdd * Increase test coverage. Raymond Hettinger <python@rcn.com> parents: 33597 diff changeset	883 for n in xrange(5):
31b08670ebdd * Increase test coverage. Raymond Hettinger <python@rcn.com> parents: 33597 diff changeset	884 result = tee('abc', n)
31b08670ebdd * Increase test coverage. Raymond Hettinger <python@rcn.com> parents: 33597 diff changeset	885 self.assertEqual(type(result), tuple)
31b08670ebdd * Increase test coverage. Raymond Hettinger <python@rcn.com> parents: 33597 diff changeset	886 self.assertEqual(len(result), n)
31b08670ebdd * Increase test coverage. Raymond Hettinger <python@rcn.com> parents: 33597 diff changeset	887 self.assertEqual(map(list, result), [list('abc')]*n)
31b08670ebdd * Increase test coverage. Raymond Hettinger <python@rcn.com> parents: 33597 diff changeset	888
30900 3096fab2a19c Improve the implementation of itertools.tee(). Raymond Hettinger <python@rcn.com> parents: 30787 diff changeset	889 # tee pass-through to copyable iterator
3096fab2a19c Improve the implementation of itertools.tee(). Raymond Hettinger <python@rcn.com> parents: 30787 diff changeset	890 a, b = tee('abc')
3096fab2a19c Improve the implementation of itertools.tee(). Raymond Hettinger <python@rcn.com> parents: 30787 diff changeset	891 c, d = tee(a)
55002 6768b2350c57 convert usage of fail* to assert* Benjamin Peterson <benjamin@python.org> parents: 51772 diff changeset	892 self.assertTrue(a is c)
30900 3096fab2a19c Improve the implementation of itertools.tee(). Raymond Hettinger <python@rcn.com> parents: 30787 diff changeset	893
33616 31b08670ebdd * Increase test coverage. Raymond Hettinger <python@rcn.com> parents: 33597 diff changeset	894 # test tee_new
31b08670ebdd * Increase test coverage. Raymond Hettinger <python@rcn.com> parents: 33597 diff changeset	895 t1, t2 = tee('abc')
31b08670ebdd * Increase test coverage. Raymond Hettinger <python@rcn.com> parents: 33597 diff changeset	896 tnew = type(t1)
31b08670ebdd * Increase test coverage. Raymond Hettinger <python@rcn.com> parents: 33597 diff changeset	897 self.assertRaises(TypeError, tnew)
31b08670ebdd * Increase test coverage. Raymond Hettinger <python@rcn.com> parents: 33597 diff changeset	898 self.assertRaises(TypeError, tnew, 10)
31b08670ebdd * Increase test coverage. Raymond Hettinger <python@rcn.com> parents: 33597 diff changeset	899 t3 = tnew(t1)
55002 6768b2350c57 convert usage of fail* to assert* Benjamin Peterson <benjamin@python.org> parents: 51772 diff changeset	900 self.assertTrue(list(t1) == list(t2) == list(t3) == list('abc'))
30786 225d848a5f96 Minor improvements to itertools.tee(): Raymond Hettinger <python@rcn.com> parents: 30764 diff changeset	901
33777 e4b7c923ed5f Fix and test weak referencing of itertools.tee objects. Raymond Hettinger <python@rcn.com> parents: 33624 diff changeset	902 # test that tee objects are weak referencable
e4b7c923ed5f Fix and test weak referencing of itertools.tee objects. Raymond Hettinger <python@rcn.com> parents: 33624 diff changeset	903 a, b = tee(xrange(10))
e4b7c923ed5f Fix and test weak referencing of itertools.tee objects. Raymond Hettinger <python@rcn.com> parents: 33624 diff changeset	904 p = proxy(a)
e4b7c923ed5f Fix and test weak referencing of itertools.tee objects. Raymond Hettinger <python@rcn.com> parents: 33624 diff changeset	905 self.assertEqual(getattr(p, '__class__'), type(b))
e4b7c923ed5f Fix and test weak referencing of itertools.tee objects. Raymond Hettinger <python@rcn.com> parents: 33624 diff changeset	906 del a
e4b7c923ed5f Fix and test weak referencing of itertools.tee objects. Raymond Hettinger <python@rcn.com> parents: 33624 diff changeset	907 self.assertRaises(ReferenceError, getattr, p, '__class__')
e4b7c923ed5f Fix and test weak referencing of itertools.tee objects. Raymond Hettinger <python@rcn.com> parents: 33624 diff changeset	908
28936 2eee9655d71b Add StopIteration tests. Raymond Hettinger <python@rcn.com> parents: 28930 diff changeset	909 def test_StopIteration(self):
30093 0ac4396b1894 Modified itertools.izip() to match the behavior of __builtin__.zip() Raymond Hettinger <python@rcn.com> parents: 30092 diff changeset	910 self.assertRaises(StopIteration, izip().next)
0ac4396b1894 Modified itertools.izip() to match the behavior of __builtin__.zip() Raymond Hettinger <python@rcn.com> parents: 30092 diff changeset	911
31136 fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	912 for f in (chain, cycle, izip, groupby):
28936 2eee9655d71b Add StopIteration tests. Raymond Hettinger <python@rcn.com> parents: 28930 diff changeset	913 self.assertRaises(StopIteration, f([]).next)
2eee9655d71b Add StopIteration tests. Raymond Hettinger <python@rcn.com> parents: 28930 diff changeset	914 self.assertRaises(StopIteration, f(StopNow()).next)
2eee9655d71b Add StopIteration tests. Raymond Hettinger <python@rcn.com> parents: 28930 diff changeset	915
2eee9655d71b Add StopIteration tests. Raymond Hettinger <python@rcn.com> parents: 28930 diff changeset	916 self.assertRaises(StopIteration, islice([], None).next)
2eee9655d71b Add StopIteration tests. Raymond Hettinger <python@rcn.com> parents: 28930 diff changeset	917 self.assertRaises(StopIteration, islice(StopNow(), None).next)
2eee9655d71b Add StopIteration tests. Raymond Hettinger <python@rcn.com> parents: 28930 diff changeset	918
30764 b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	919 p, q = tee([])
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	920 self.assertRaises(StopIteration, p.next)
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	921 self.assertRaises(StopIteration, q.next)
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	922 p, q = tee(StopNow())
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	923 self.assertRaises(StopIteration, p.next)
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	924 self.assertRaises(StopIteration, q.next)
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	925
28936 2eee9655d71b Add StopIteration tests. Raymond Hettinger <python@rcn.com> parents: 28930 diff changeset	926 self.assertRaises(StopIteration, repeat(None, 0).next)
2eee9655d71b Add StopIteration tests. Raymond Hettinger <python@rcn.com> parents: 28930 diff changeset	927
2eee9655d71b Add StopIteration tests. Raymond Hettinger <python@rcn.com> parents: 28930 diff changeset	928 for f in (ifilter, ifilterfalse, imap, takewhile, dropwhile, starmap):
2eee9655d71b Add StopIteration tests. Raymond Hettinger <python@rcn.com> parents: 28930 diff changeset	929 self.assertRaises(StopIteration, f(lambda x:x, []).next)
2eee9655d71b Add StopIteration tests. Raymond Hettinger <python@rcn.com> parents: 28930 diff changeset	930 self.assertRaises(StopIteration, f(lambda x:x, StopNow()).next)
2eee9655d71b Add StopIteration tests. Raymond Hettinger <python@rcn.com> parents: 28930 diff changeset	931
45698 44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	932 class TestExamples(unittest.TestCase):
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	933
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	934 def test_chain(self):
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	935 self.assertEqual(''.join(chain('ABC', 'DEF')), 'ABCDEF')
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	936
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	937 def test_chain_from_iterable(self):
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	938 self.assertEqual(''.join(chain.from_iterable(['ABC', 'DEF'])), 'ABCDEF')
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	939
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	940 def test_combinations(self):
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	941 self.assertEqual(list(combinations('ABCD', 2)),
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	942 [('A','B'), ('A','C'), ('A','D'), ('B','C'), ('B','D'), ('C','D')])
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	943 self.assertEqual(list(combinations(range(4), 3)),
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	944 [(0,1,2), (0,1,3), (0,2,3), (1,2,3)])
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	945
51097 b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	946 def test_combinations_with_replacement(self):
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	947 self.assertEqual(list(combinations_with_replacement('ABC', 2)),
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	948 [('A','A'), ('A','B'), ('A','C'), ('B','B'), ('B','C'), ('C','C')])
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	949
51045 14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	950 def test_compress(self):
14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	951 self.assertEqual(list(compress('ABCDEF', [1,0,1,0,1,1])), list('ACEF'))
14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	952
45698 44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	953 def test_count(self):
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	954 self.assertEqual(list(islice(count(10), 5)), [10, 11, 12, 13, 14])
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	955
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	956 def test_cycle(self):
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	957 self.assertEqual(list(islice(cycle('ABCD'), 12)), list('ABCDABCDABCD'))
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	958
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	959 def test_dropwhile(self):
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	960 self.assertEqual(list(dropwhile(lambda x: x<5, [1,4,6,4,1])), [6,4,1])
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	961
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	962 def test_groupby(self):
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	963 self.assertEqual([k for k, g in groupby('AAAABBBCCDAABBB')],
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	964 list('ABCDAB'))
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	965 self.assertEqual([(list(g)) for k, g in groupby('AAAABBBCCD')],
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	966 [list('AAAA'), list('BBB'), list('CC'), list('D')])
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	967
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	968 def test_ifilter(self):
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	969 self.assertEqual(list(ifilter(lambda x: x%2, range(10))), [1,3,5,7,9])
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	970
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	971 def test_ifilterfalse(self):
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	972 self.assertEqual(list(ifilterfalse(lambda x: x%2, range(10))), [0,2,4,6,8])
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	973
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	974 def test_imap(self):
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	975 self.assertEqual(list(imap(pow, (2,3,10), (5,2,3))), [32, 9, 1000])
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	976
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	977 def test_islice(self):
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	978 self.assertEqual(list(islice('ABCDEFG', 2)), list('AB'))
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	979 self.assertEqual(list(islice('ABCDEFG', 2, 4)), list('CD'))
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	980 self.assertEqual(list(islice('ABCDEFG', 2, None)), list('CDEFG'))
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	981 self.assertEqual(list(islice('ABCDEFG', 0, None, 2)), list('ACEG'))
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	982
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	983 def test_izip(self):
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	984 self.assertEqual(list(izip('ABCD', 'xy')), [('A', 'x'), ('B', 'y')])
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	985
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	986 def test_izip_longest(self):
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	987 self.assertEqual(list(izip_longest('ABCD', 'xy', fillvalue='-')),
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	988 [('A', 'x'), ('B', 'y'), ('C', '-'), ('D', '-')])
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	989
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	990 def test_permutations(self):
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	991 self.assertEqual(list(permutations('ABCD', 2)),
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	992 map(tuple, 'AB AC AD BA BC BD CA CB CD DA DB DC'.split()))
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	993 self.assertEqual(list(permutations(range(3))),
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	994 [(0,1,2), (0,2,1), (1,0,2), (1,2,0), (2,0,1), (2,1,0)])
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	995
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	996 def test_product(self):
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	997 self.assertEqual(list(product('ABCD', 'xy')),
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	998 map(tuple, 'Ax Ay Bx By Cx Cy Dx Dy'.split()))
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	999 self.assertEqual(list(product(range(2), repeat=3)),
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1000 [(0,0,0), (0,0,1), (0,1,0), (0,1,1),
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1001 (1,0,0), (1,0,1), (1,1,0), (1,1,1)])
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1002
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1003 def test_repeat(self):
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1004 self.assertEqual(list(repeat(10, 3)), [10, 10, 10])
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1005
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1006 def test_stapmap(self):
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1007 self.assertEqual(list(starmap(pow, [(2,5), (3,2), (10,3)])),
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1008 [32, 9, 1000])
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1009
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1010 def test_takewhile(self):
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1011 self.assertEqual(list(takewhile(lambda x: x<5, [1,4,6,4,1])), [1,4])
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1012
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1013
30764 b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1014 class TestGC(unittest.TestCase):
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1015
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1016 def makecycle(self, iterator, container):
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1017 container.append(iterator)
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1018 iterator.next()
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1019 del container, iterator
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1020
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1021 def test_chain(self):
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1022 a = []
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1023 self.makecycle(chain(a), a)
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1024
45698 44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1025 def test_chain_from_iterable(self):
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1026 a = []
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1027 self.makecycle(chain.from_iterable([a]), a)
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1028
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1029 def test_combinations(self):
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1030 a = []
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1031 self.makecycle(combinations([1,2,a,3], 3), a)
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1032
51097 b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	1033 def test_combinations_with_replacement(self):
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	1034 a = []
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	1035 self.makecycle(combinations_with_replacement([1,2,a,3], 3), a)
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool. Raymond Hettinger <python@rcn.com> parents: 51046 diff changeset	1036
51045 14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	1037 def test_compress(self):
14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	1038 a = []
14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	1039 self.makecycle(compress('ABCDEF', [1,0,1,0,1,0]), a)
14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	1040
51660 0ebbcf5988db Add GC support to count() objects. Backport candidate. Raymond Hettinger <python@rcn.com> parents: 51622 diff changeset	1041 def test_count(self):
0ebbcf5988db Add GC support to count() objects. Backport candidate. Raymond Hettinger <python@rcn.com> parents: 51622 diff changeset	1042 a = []
0ebbcf5988db Add GC support to count() objects. Backport candidate. Raymond Hettinger <python@rcn.com> parents: 51622 diff changeset	1043 Int = type('Int', (int,), dict(x=a))
0ebbcf5988db Add GC support to count() objects. Backport candidate. Raymond Hettinger <python@rcn.com> parents: 51622 diff changeset	1044 self.makecycle(count(Int(0), Int(1)), a)
0ebbcf5988db Add GC support to count() objects. Backport candidate. Raymond Hettinger <python@rcn.com> parents: 51622 diff changeset	1045
30764 b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1046 def test_cycle(self):
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1047 a = []
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1048 self.makecycle(cycle([a]*2), a)
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1049
33624 5730f77e37e4 Improve test coverage. Raymond Hettinger <python@rcn.com> parents: 33616 diff changeset	1050 def test_dropwhile(self):
5730f77e37e4 Improve test coverage. Raymond Hettinger <python@rcn.com> parents: 33616 diff changeset	1051 a = []
5730f77e37e4 Improve test coverage. Raymond Hettinger <python@rcn.com> parents: 33616 diff changeset	1052 self.makecycle(dropwhile(bool, [0, a, a]), a)
5730f77e37e4 Improve test coverage. Raymond Hettinger <python@rcn.com> parents: 33616 diff changeset	1053
5730f77e37e4 Improve test coverage. Raymond Hettinger <python@rcn.com> parents: 33616 diff changeset	1054 def test_groupby(self):
5730f77e37e4 Improve test coverage. Raymond Hettinger <python@rcn.com> parents: 33616 diff changeset	1055 a = []
5730f77e37e4 Improve test coverage. Raymond Hettinger <python@rcn.com> parents: 33616 diff changeset	1056 self.makecycle(groupby([a]*2, lambda x:x), a)
5730f77e37e4 Improve test coverage. Raymond Hettinger <python@rcn.com> parents: 33616 diff changeset	1057
45700 7122fa65697b Backport r61286 adding GC to the grouper for itertools.groupby() fixing Issue 2246. Raymond Hettinger <python@rcn.com> parents: 41633 diff changeset	1058 def test_issue2246(self):
7122fa65697b Backport r61286 adding GC to the grouper for itertools.groupby() fixing Issue 2246. Raymond Hettinger <python@rcn.com> parents: 41633 diff changeset	1059 # Issue 2246 -- the _grouper iterator was not included in GC
7122fa65697b Backport r61286 adding GC to the grouper for itertools.groupby() fixing Issue 2246. Raymond Hettinger <python@rcn.com> parents: 41633 diff changeset	1060 n = 10
7122fa65697b Backport r61286 adding GC to the grouper for itertools.groupby() fixing Issue 2246. Raymond Hettinger <python@rcn.com> parents: 41633 diff changeset	1061 keyfunc = lambda x: x
7122fa65697b Backport r61286 adding GC to the grouper for itertools.groupby() fixing Issue 2246. Raymond Hettinger <python@rcn.com> parents: 41633 diff changeset	1062 for i, j in groupby(xrange(n), key=keyfunc):
7122fa65697b Backport r61286 adding GC to the grouper for itertools.groupby() fixing Issue 2246. Raymond Hettinger <python@rcn.com> parents: 41633 diff changeset	1063 keyfunc.__dict__.setdefault('x',[]).append(j)
7122fa65697b Backport r61286 adding GC to the grouper for itertools.groupby() fixing Issue 2246. Raymond Hettinger <python@rcn.com> parents: 41633 diff changeset	1064
30764 b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1065 def test_ifilter(self):
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1066 a = []
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1067 self.makecycle(ifilter(lambda x:True, [a]*2), a)
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1068
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1069 def test_ifilterfalse(self):
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1070 a = []
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1071 self.makecycle(ifilterfalse(lambda x:False, a), a)
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1072
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1073 def test_izip(self):
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1074 a = []
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1075 self.makecycle(izip([a]2, [a]3), a)
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1076
45698 44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1077 def test_izip_longest(self):
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1078 a = []
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1079 self.makecycle(izip_longest([a]2, [a]3), a)
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1080 b = [a, None]
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1081 self.makecycle(izip_longest([a]2, [a]3, fillvalue=b), a)
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1082
30764 b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1083 def test_imap(self):
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1084 a = []
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1085 self.makecycle(imap(lambda x:x, [a]*2), a)
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1086
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1087 def test_islice(self):
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1088 a = []
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1089 self.makecycle(islice([a]*2, None), a)
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1090
45698 44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1091 def test_permutations(self):
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1092 a = []
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1093 self.makecycle(permutations([1,2,a,3], 3), a)
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1094
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1095 def test_product(self):
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1096 a = []
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1097 self.makecycle(product([1,2,a,3], repeat=3), a)
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1098
33624 5730f77e37e4 Improve test coverage. Raymond Hettinger <python@rcn.com> parents: 33616 diff changeset	1099 def test_repeat(self):
5730f77e37e4 Improve test coverage. Raymond Hettinger <python@rcn.com> parents: 33616 diff changeset	1100 a = []
5730f77e37e4 Improve test coverage. Raymond Hettinger <python@rcn.com> parents: 33616 diff changeset	1101 self.makecycle(repeat(a), a)
5730f77e37e4 Improve test coverage. Raymond Hettinger <python@rcn.com> parents: 33616 diff changeset	1102
30764 b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1103 def test_starmap(self):
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1104 a = []
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1105 self.makecycle(starmap(lambda t: t, [(a,a)]2), a)
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1106
33624 5730f77e37e4 Improve test coverage. Raymond Hettinger <python@rcn.com> parents: 33616 diff changeset	1107 def test_takewhile(self):
5730f77e37e4 Improve test coverage. Raymond Hettinger <python@rcn.com> parents: 33616 diff changeset	1108 a = []
5730f77e37e4 Improve test coverage. Raymond Hettinger <python@rcn.com> parents: 33616 diff changeset	1109 self.makecycle(takewhile(bool, [1, 0, a, a]), a)
5730f77e37e4 Improve test coverage. Raymond Hettinger <python@rcn.com> parents: 33616 diff changeset	1110
29303 e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1111 def R(seqn):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1112 'Regular generator'
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1113 for i in seqn:
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1114 yield i
28936 2eee9655d71b Add StopIteration tests. Raymond Hettinger <python@rcn.com> parents: 28930 diff changeset	1115
29303 e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1116 class G:
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1117 'Sequence using __getitem__'
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1118 def __init__(self, seqn):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1119 self.seqn = seqn
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1120 def __getitem__(self, i):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1121 return self.seqn[i]
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1122
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1123 class I:
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1124 'Sequence using iterator protocol'
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1125 def __init__(self, seqn):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1126 self.seqn = seqn
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1127 self.i = 0
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1128 def __iter__(self):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1129 return self
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1130 def next(self):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1131 if self.i >= len(self.seqn): raise StopIteration
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1132 v = self.seqn[self.i]
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1133 self.i += 1
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1134 return v
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1135
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1136 class Ig:
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1137 'Sequence using iterator protocol defined with a generator'
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1138 def __init__(self, seqn):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1139 self.seqn = seqn
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1140 self.i = 0
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1141 def __iter__(self):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1142 for val in self.seqn:
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1143 yield val
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1144
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1145 class X:
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1146 'Missing __getitem__ and __iter__'
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1147 def __init__(self, seqn):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1148 self.seqn = seqn
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1149 self.i = 0
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1150 def next(self):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1151 if self.i >= len(self.seqn): raise StopIteration
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1152 v = self.seqn[self.i]
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1153 self.i += 1
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1154 return v
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1155
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1156 class N:
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1157 'Iterator missing next()'
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1158 def __init__(self, seqn):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1159 self.seqn = seqn
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1160 self.i = 0
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1161 def __iter__(self):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1162 return self
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1163
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1164 class E:
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1165 'Test propagation of exceptions'
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1166 def __init__(self, seqn):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1167 self.seqn = seqn
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1168 self.i = 0
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1169 def __iter__(self):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1170 return self
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1171 def next(self):
33597 355b15e4a4da Use floor division operator. Raymond Hettinger <python@rcn.com> parents: 33546 diff changeset	1172 3 // 0
29303 e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1173
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1174 class S:
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1175 'Test immediate stop'
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1176 def __init__(self, seqn):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1177 pass
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1178 def __iter__(self):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1179 return self
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1180 def next(self):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1181 raise StopIteration
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1182
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1183 def L(seqn):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1184 'Test multiple tiers of iterators'
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1185 return chain(imap(lambda x:x, R(Ig(G(seqn)))))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1186
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1187
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1188 class TestVariousIteratorArgs(unittest.TestCase):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1189
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1190 def test_chain(self):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1191 for s in ("123", "", range(1000), ('do', 1.2), xrange(2000,2200,5)):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1192 for g in (G, I, Ig, S, L, R):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1193 self.assertEqual(list(chain(g(s))), list(g(s)))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1194 self.assertEqual(list(chain(g(s), g(s))), list(g(s))+list(g(s)))
45562 43e084847e53 Have itertools.chain() consume its inputs lazily instead of building a tuple of iterators at the outset. Raymond Hettinger <python@rcn.com> parents: 45541 diff changeset	1195 self.assertRaises(TypeError, list, chain(X(s)))
29303 e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1196 self.assertRaises(TypeError, list, chain(N(s)))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1197 self.assertRaises(ZeroDivisionError, list, chain(E(s)))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1198
51045 14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	1199 def test_compress(self):
14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	1200 for s in ("123", "", range(1000), ('do', 1.2), xrange(2000,2200,5)):
14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	1201 n = len(s)
14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	1202 for g in (G, I, Ig, S, L, R):
14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	1203 self.assertEqual(list(compress(g(s), repeat(1))), list(g(s)))
14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	1204 self.assertRaises(TypeError, compress, X(s), repeat(1))
14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	1205 self.assertRaises(TypeError, list, compress(N(s), repeat(1)))
14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	1206 self.assertRaises(ZeroDivisionError, list, compress(E(s), repeat(1)))
14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	1207
45425 3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming. Raymond Hettinger <python@rcn.com> parents: 44717 diff changeset	1208 def test_product(self):
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming. Raymond Hettinger <python@rcn.com> parents: 44717 diff changeset	1209 for s in ("123", "", range(1000), ('do', 1.2), xrange(2000,2200,5)):
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming. Raymond Hettinger <python@rcn.com> parents: 44717 diff changeset	1210 self.assertRaises(TypeError, product, X(s))
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming. Raymond Hettinger <python@rcn.com> parents: 44717 diff changeset	1211 self.assertRaises(TypeError, product, N(s))
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming. Raymond Hettinger <python@rcn.com> parents: 44717 diff changeset	1212 self.assertRaises(ZeroDivisionError, product, E(s))
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming. Raymond Hettinger <python@rcn.com> parents: 44717 diff changeset	1213
29303 e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1214 def test_cycle(self):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1215 for s in ("123", "", range(1000), ('do', 1.2), xrange(2000,2200,5)):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1216 for g in (G, I, Ig, S, L, R):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1217 tgtlen = len(s) * 3
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1218 expected = list(g(s))*3
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1219 actual = list(islice(cycle(g(s)), tgtlen))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1220 self.assertEqual(actual, expected)
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1221 self.assertRaises(TypeError, cycle, X(s))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1222 self.assertRaises(TypeError, list, cycle(N(s)))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1223 self.assertRaises(ZeroDivisionError, list, cycle(E(s)))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1224
31136 fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	1225 def test_groupby(self):
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	1226 for s in (range(10), range(0), range(1000), (7,11), xrange(2000,2200,5)):
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	1227 for g in (G, I, Ig, S, L, R):
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	1228 self.assertEqual([k for k, sb in groupby(g(s))], list(g(s)))
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	1229 self.assertRaises(TypeError, groupby, X(s))
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	1230 self.assertRaises(TypeError, list, groupby(N(s)))
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	1231 self.assertRaises(ZeroDivisionError, list, groupby(E(s)))
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	1232
29303 e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1233 def test_ifilter(self):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1234 for s in (range(10), range(0), range(1000), (7,11), xrange(2000,2200,5)):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1235 for g in (G, I, Ig, S, L, R):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1236 self.assertEqual(list(ifilter(isEven, g(s))), filter(isEven, g(s)))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1237 self.assertRaises(TypeError, ifilter, isEven, X(s))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1238 self.assertRaises(TypeError, list, ifilter(isEven, N(s)))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1239 self.assertRaises(ZeroDivisionError, list, ifilter(isEven, E(s)))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1240
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1241 def test_ifilterfalse(self):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1242 for s in (range(10), range(0), range(1000), (7,11), xrange(2000,2200,5)):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1243 for g in (G, I, Ig, S, L, R):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1244 self.assertEqual(list(ifilterfalse(isEven, g(s))), filter(isOdd, g(s)))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1245 self.assertRaises(TypeError, ifilterfalse, isEven, X(s))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1246 self.assertRaises(TypeError, list, ifilterfalse(isEven, N(s)))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1247 self.assertRaises(ZeroDivisionError, list, ifilterfalse(isEven, E(s)))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1248
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1249 def test_izip(self):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1250 for s in ("123", "", range(1000), ('do', 1.2), xrange(2000,2200,5)):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1251 for g in (G, I, Ig, S, L, R):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1252 self.assertEqual(list(izip(g(s))), zip(g(s)))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1253 self.assertEqual(list(izip(g(s), g(s))), zip(g(s), g(s)))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1254 self.assertRaises(TypeError, izip, X(s))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1255 self.assertRaises(TypeError, list, izip(N(s)))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1256 self.assertRaises(ZeroDivisionError, list, izip(E(s)))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1257
40877 6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	1258 def test_iziplongest(self):
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	1259 for s in ("123", "", range(1000), ('do', 1.2), xrange(2000,2200,5)):
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	1260 for g in (G, I, Ig, S, L, R):
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	1261 self.assertEqual(list(izip_longest(g(s))), zip(g(s)))
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	1262 self.assertEqual(list(izip_longest(g(s), g(s))), zip(g(s), g(s)))
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	1263 self.assertRaises(TypeError, izip_longest, X(s))
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	1264 self.assertRaises(TypeError, list, izip_longest(N(s)))
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	1265 self.assertRaises(ZeroDivisionError, list, izip_longest(E(s)))
6fa0d682e1e5 Add itertools.izip_longest(). Raymond Hettinger <python@rcn.com> parents: 40766 diff changeset	1266
29303 e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1267 def test_imap(self):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1268 for s in (range(10), range(0), range(100), (7,11), xrange(20,50,5)):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1269 for g in (G, I, Ig, S, L, R):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1270 self.assertEqual(list(imap(onearg, g(s))), map(onearg, g(s)))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1271 self.assertEqual(list(imap(operator.pow, g(s), g(s))), map(operator.pow, g(s), g(s)))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1272 self.assertRaises(TypeError, imap, onearg, X(s))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1273 self.assertRaises(TypeError, list, imap(onearg, N(s)))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1274 self.assertRaises(ZeroDivisionError, list, imap(onearg, E(s)))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1275
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1276 def test_islice(self):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1277 for s in ("12345", "", range(1000), ('do', 1.2), xrange(2000,2200,5)):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1278 for g in (G, I, Ig, S, L, R):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1279 self.assertEqual(list(islice(g(s),1,None,2)), list(g(s))[1::2])
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1280 self.assertRaises(TypeError, islice, X(s), 10)
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1281 self.assertRaises(TypeError, list, islice(N(s), 10))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1282 self.assertRaises(ZeroDivisionError, list, islice(E(s), 10))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1283
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1284 def test_starmap(self):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1285 for s in (range(10), range(0), range(100), (7,11), xrange(20,50,5)):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1286 for g in (G, I, Ig, S, L, R):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1287 ss = zip(s, s)
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1288 self.assertEqual(list(starmap(operator.pow, g(ss))), map(operator.pow, g(s), g(s)))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1289 self.assertRaises(TypeError, starmap, operator.pow, X(ss))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1290 self.assertRaises(TypeError, list, starmap(operator.pow, N(ss)))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1291 self.assertRaises(ZeroDivisionError, list, starmap(operator.pow, E(ss)))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1292
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1293 def test_takewhile(self):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1294 for s in (range(10), range(0), range(1000), (7,11), xrange(2000,2200,5)):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1295 for g in (G, I, Ig, S, L, R):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1296 tgt = []
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1297 for elem in g(s):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1298 if not isEven(elem): break
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1299 tgt.append(elem)
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1300 self.assertEqual(list(takewhile(isEven, g(s))), tgt)
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1301 self.assertRaises(TypeError, takewhile, isEven, X(s))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1302 self.assertRaises(TypeError, list, takewhile(isEven, N(s)))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1303 self.assertRaises(ZeroDivisionError, list, takewhile(isEven, E(s)))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1304
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1305 def test_dropwhile(self):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1306 for s in (range(10), range(0), range(1000), (7,11), xrange(2000,2200,5)):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1307 for g in (G, I, Ig, S, L, R):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1308 tgt = []
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1309 for elem in g(s):
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1310 if not tgt and isOdd(elem): continue
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1311 tgt.append(elem)
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1312 self.assertEqual(list(dropwhile(isOdd, g(s))), tgt)
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1313 self.assertRaises(TypeError, dropwhile, isOdd, X(s))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1314 self.assertRaises(TypeError, list, dropwhile(isOdd, N(s)))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1315 self.assertRaises(ZeroDivisionError, list, dropwhile(isOdd, E(s)))
e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1316
30764 b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1317 def test_tee(self):
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1318 for s in ("123", "", range(1000), ('do', 1.2), xrange(2000,2200,5)):
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1319 for g in (G, I, Ig, S, L, R):
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1320 it1, it2 = tee(g(s))
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1321 self.assertEqual(list(it1), list(g(s)))
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1322 self.assertEqual(list(it2), list(g(s)))
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1323 self.assertRaises(TypeError, tee, X(s))
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1324 self.assertRaises(TypeError, list, tee(N(s))[0])
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1325 self.assertRaises(ZeroDivisionError, list, tee(E(s))[0])
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1326
31501 14f860b03be2 Give itertools.repeat() a length method. Raymond Hettinger <python@rcn.com> parents: 31401 diff changeset	1327 class LengthTransparency(unittest.TestCase):
14f860b03be2 Give itertools.repeat() a length method. Raymond Hettinger <python@rcn.com> parents: 31401 diff changeset	1328
14f860b03be2 Give itertools.repeat() a length method. Raymond Hettinger <python@rcn.com> parents: 31401 diff changeset	1329 def test_repeat(self):
35636 e22334b1da67 Convert iterator __len__() methods to a private API. Raymond Hettinger <python@rcn.com> parents: 34814 diff changeset	1330 from test.test_iterlen import len
31501 14f860b03be2 Give itertools.repeat() a length method. Raymond Hettinger <python@rcn.com> parents: 31401 diff changeset	1331 self.assertEqual(len(repeat(None, 50)), 50)
14f860b03be2 Give itertools.repeat() a length method. Raymond Hettinger <python@rcn.com> parents: 31401 diff changeset	1332 self.assertRaises(TypeError, len, repeat(None))
14f860b03be2 Give itertools.repeat() a length method. Raymond Hettinger <python@rcn.com> parents: 31401 diff changeset	1333
30238 a570bb9f133f SF bug #793826: using itertools.izip to mutate tuples Raymond Hettinger <python@rcn.com> parents: 30093 diff changeset	1334 class RegressionTests(unittest.TestCase):
a570bb9f133f SF bug #793826: using itertools.izip to mutate tuples Raymond Hettinger <python@rcn.com> parents: 30093 diff changeset	1335
a570bb9f133f SF bug #793826: using itertools.izip to mutate tuples Raymond Hettinger <python@rcn.com> parents: 30093 diff changeset	1336 def test_sf_793826(self):
a570bb9f133f SF bug #793826: using itertools.izip to mutate tuples Raymond Hettinger <python@rcn.com> parents: 30093 diff changeset	1337 # Fix Armin Rigo's successful efforts to wreak havoc
a570bb9f133f SF bug #793826: using itertools.izip to mutate tuples Raymond Hettinger <python@rcn.com> parents: 30093 diff changeset	1338
a570bb9f133f SF bug #793826: using itertools.izip to mutate tuples Raymond Hettinger <python@rcn.com> parents: 30093 diff changeset	1339 def mutatingtuple(tuple1, f, tuple2):
a570bb9f133f SF bug #793826: using itertools.izip to mutate tuples Raymond Hettinger <python@rcn.com> parents: 30093 diff changeset	1340 # this builds a tuple t which is a copy of tuple1,
a570bb9f133f SF bug #793826: using itertools.izip to mutate tuples Raymond Hettinger <python@rcn.com> parents: 30093 diff changeset	1341 # then calls f(t), then mutates t to be equal to tuple2
a570bb9f133f SF bug #793826: using itertools.izip to mutate tuples Raymond Hettinger <python@rcn.com> parents: 30093 diff changeset	1342 # (needs len(tuple1) == len(tuple2)).
a570bb9f133f SF bug #793826: using itertools.izip to mutate tuples Raymond Hettinger <python@rcn.com> parents: 30093 diff changeset	1343 def g(value, first=[1]):
a570bb9f133f SF bug #793826: using itertools.izip to mutate tuples Raymond Hettinger <python@rcn.com> parents: 30093 diff changeset	1344 if first:
a570bb9f133f SF bug #793826: using itertools.izip to mutate tuples Raymond Hettinger <python@rcn.com> parents: 30093 diff changeset	1345 del first[:]
a570bb9f133f SF bug #793826: using itertools.izip to mutate tuples Raymond Hettinger <python@rcn.com> parents: 30093 diff changeset	1346 f(z.next())
a570bb9f133f SF bug #793826: using itertools.izip to mutate tuples Raymond Hettinger <python@rcn.com> parents: 30093 diff changeset	1347 return value
a570bb9f133f SF bug #793826: using itertools.izip to mutate tuples Raymond Hettinger <python@rcn.com> parents: 30093 diff changeset	1348 items = list(tuple2)
a570bb9f133f SF bug #793826: using itertools.izip to mutate tuples Raymond Hettinger <python@rcn.com> parents: 30093 diff changeset	1349 items[1:1] = list(tuple1)
a570bb9f133f SF bug #793826: using itertools.izip to mutate tuples Raymond Hettinger <python@rcn.com> parents: 30093 diff changeset	1350 gen = imap(g, items)
a570bb9f133f SF bug #793826: using itertools.izip to mutate tuples Raymond Hettinger <python@rcn.com> parents: 30093 diff changeset	1351 z = izip([gen]len(tuple1))
a570bb9f133f SF bug #793826: using itertools.izip to mutate tuples Raymond Hettinger <python@rcn.com> parents: 30093 diff changeset	1352 z.next()
a570bb9f133f SF bug #793826: using itertools.izip to mutate tuples Raymond Hettinger <python@rcn.com> parents: 30093 diff changeset	1353
a570bb9f133f SF bug #793826: using itertools.izip to mutate tuples Raymond Hettinger <python@rcn.com> parents: 30093 diff changeset	1354 def f(t):
a570bb9f133f SF bug #793826: using itertools.izip to mutate tuples Raymond Hettinger <python@rcn.com> parents: 30093 diff changeset	1355 global T
a570bb9f133f SF bug #793826: using itertools.izip to mutate tuples Raymond Hettinger <python@rcn.com> parents: 30093 diff changeset	1356 T = t
a570bb9f133f SF bug #793826: using itertools.izip to mutate tuples Raymond Hettinger <python@rcn.com> parents: 30093 diff changeset	1357 first[:] = list(T)
a570bb9f133f SF bug #793826: using itertools.izip to mutate tuples Raymond Hettinger <python@rcn.com> parents: 30093 diff changeset	1358
a570bb9f133f SF bug #793826: using itertools.izip to mutate tuples Raymond Hettinger <python@rcn.com> parents: 30093 diff changeset	1359 first = []
a570bb9f133f SF bug #793826: using itertools.izip to mutate tuples Raymond Hettinger <python@rcn.com> parents: 30093 diff changeset	1360 mutatingtuple((1,2,3), f, (4,5,6))
a570bb9f133f SF bug #793826: using itertools.izip to mutate tuples Raymond Hettinger <python@rcn.com> parents: 30093 diff changeset	1361 second = list(T)
a570bb9f133f SF bug #793826: using itertools.izip to mutate tuples Raymond Hettinger <python@rcn.com> parents: 30093 diff changeset	1362 self.assertEqual(first, second)
a570bb9f133f SF bug #793826: using itertools.izip to mutate tuples Raymond Hettinger <python@rcn.com> parents: 30093 diff changeset	1363
29303 e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1364
32010 544f2172363d SF #950057: itertools.chain doesn't "process" exceptions as they occur Raymond Hettinger <python@rcn.com> parents: 31501 diff changeset	1365 def test_sf_950057(self):
544f2172363d SF #950057: itertools.chain doesn't "process" exceptions as they occur Raymond Hettinger <python@rcn.com> parents: 31501 diff changeset	1366 # Make sure that chain() and cycle() catch exceptions immediately
544f2172363d SF #950057: itertools.chain doesn't "process" exceptions as they occur Raymond Hettinger <python@rcn.com> parents: 31501 diff changeset	1367 # rather than when shifting between input sources
544f2172363d SF #950057: itertools.chain doesn't "process" exceptions as they occur Raymond Hettinger <python@rcn.com> parents: 31501 diff changeset	1368
544f2172363d SF #950057: itertools.chain doesn't "process" exceptions as they occur Raymond Hettinger <python@rcn.com> parents: 31501 diff changeset	1369 def gen1():
544f2172363d SF #950057: itertools.chain doesn't "process" exceptions as they occur Raymond Hettinger <python@rcn.com> parents: 31501 diff changeset	1370 hist.append(0)
544f2172363d SF #950057: itertools.chain doesn't "process" exceptions as they occur Raymond Hettinger <python@rcn.com> parents: 31501 diff changeset	1371 yield 1
544f2172363d SF #950057: itertools.chain doesn't "process" exceptions as they occur Raymond Hettinger <python@rcn.com> parents: 31501 diff changeset	1372 hist.append(1)
32747 e4575519ec26 test_sf_950057's gen1() used an assert statement, which caused the test Tim Peters <tim.peters@gmail.com> parents: 32010 diff changeset	1373 raise AssertionError
32010 544f2172363d SF #950057: itertools.chain doesn't "process" exceptions as they occur Raymond Hettinger <python@rcn.com> parents: 31501 diff changeset	1374 hist.append(2)
544f2172363d SF #950057: itertools.chain doesn't "process" exceptions as they occur Raymond Hettinger <python@rcn.com> parents: 31501 diff changeset	1375
544f2172363d SF #950057: itertools.chain doesn't "process" exceptions as they occur Raymond Hettinger <python@rcn.com> parents: 31501 diff changeset	1376 def gen2(x):
544f2172363d SF #950057: itertools.chain doesn't "process" exceptions as they occur Raymond Hettinger <python@rcn.com> parents: 31501 diff changeset	1377 hist.append(3)
544f2172363d SF #950057: itertools.chain doesn't "process" exceptions as they occur Raymond Hettinger <python@rcn.com> parents: 31501 diff changeset	1378 yield 2
544f2172363d SF #950057: itertools.chain doesn't "process" exceptions as they occur Raymond Hettinger <python@rcn.com> parents: 31501 diff changeset	1379 hist.append(4)
544f2172363d SF #950057: itertools.chain doesn't "process" exceptions as they occur Raymond Hettinger <python@rcn.com> parents: 31501 diff changeset	1380 if x:
544f2172363d SF #950057: itertools.chain doesn't "process" exceptions as they occur Raymond Hettinger <python@rcn.com> parents: 31501 diff changeset	1381 raise StopIteration
544f2172363d SF #950057: itertools.chain doesn't "process" exceptions as they occur Raymond Hettinger <python@rcn.com> parents: 31501 diff changeset	1382
544f2172363d SF #950057: itertools.chain doesn't "process" exceptions as they occur Raymond Hettinger <python@rcn.com> parents: 31501 diff changeset	1383 hist = []
544f2172363d SF #950057: itertools.chain doesn't "process" exceptions as they occur Raymond Hettinger <python@rcn.com> parents: 31501 diff changeset	1384 self.assertRaises(AssertionError, list, chain(gen1(), gen2(False)))
544f2172363d SF #950057: itertools.chain doesn't "process" exceptions as they occur Raymond Hettinger <python@rcn.com> parents: 31501 diff changeset	1385 self.assertEqual(hist, [0,1])
544f2172363d SF #950057: itertools.chain doesn't "process" exceptions as they occur Raymond Hettinger <python@rcn.com> parents: 31501 diff changeset	1386
544f2172363d SF #950057: itertools.chain doesn't "process" exceptions as they occur Raymond Hettinger <python@rcn.com> parents: 31501 diff changeset	1387 hist = []
544f2172363d SF #950057: itertools.chain doesn't "process" exceptions as they occur Raymond Hettinger <python@rcn.com> parents: 31501 diff changeset	1388 self.assertRaises(AssertionError, list, chain(gen1(), gen2(True)))
544f2172363d SF #950057: itertools.chain doesn't "process" exceptions as they occur Raymond Hettinger <python@rcn.com> parents: 31501 diff changeset	1389 self.assertEqual(hist, [0,1])
544f2172363d SF #950057: itertools.chain doesn't "process" exceptions as they occur Raymond Hettinger <python@rcn.com> parents: 31501 diff changeset	1390
544f2172363d SF #950057: itertools.chain doesn't "process" exceptions as they occur Raymond Hettinger <python@rcn.com> parents: 31501 diff changeset	1391 hist = []
544f2172363d SF #950057: itertools.chain doesn't "process" exceptions as they occur Raymond Hettinger <python@rcn.com> parents: 31501 diff changeset	1392 self.assertRaises(AssertionError, list, cycle(gen1()))
544f2172363d SF #950057: itertools.chain doesn't "process" exceptions as they occur Raymond Hettinger <python@rcn.com> parents: 31501 diff changeset	1393 self.assertEqual(hist, [0,1])
544f2172363d SF #950057: itertools.chain doesn't "process" exceptions as they occur Raymond Hettinger <python@rcn.com> parents: 31501 diff changeset	1394
40682 77e0f4718a7c Bug #1486663: don't reject keyword arguments for subclasses of builtin Georg Brandl <georg@python.org> parents: 39866 diff changeset	1395 class SubclassWithKwargsTest(unittest.TestCase):
77e0f4718a7c Bug #1486663: don't reject keyword arguments for subclasses of builtin Georg Brandl <georg@python.org> parents: 39866 diff changeset	1396 def test_keywords_in_subclass(self):
77e0f4718a7c Bug #1486663: don't reject keyword arguments for subclasses of builtin Georg Brandl <georg@python.org> parents: 39866 diff changeset	1397 # count is not subclassable...
77e0f4718a7c Bug #1486663: don't reject keyword arguments for subclasses of builtin Georg Brandl <georg@python.org> parents: 39866 diff changeset	1398 for cls in (repeat, izip, ifilter, ifilterfalse, chain, imap,
51045 14ace205447b Promote compress() from a recipe to being a regular itertool. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	1399 starmap, islice, takewhile, dropwhile, cycle, compress):
40682 77e0f4718a7c Bug #1486663: don't reject keyword arguments for subclasses of builtin Georg Brandl <georg@python.org> parents: 39866 diff changeset	1400 class Subclass(cls):
77e0f4718a7c Bug #1486663: don't reject keyword arguments for subclasses of builtin Georg Brandl <georg@python.org> parents: 39866 diff changeset	1401 def __init__(self, newarg=None, *args):
77e0f4718a7c Bug #1486663: don't reject keyword arguments for subclasses of builtin Georg Brandl <georg@python.org> parents: 39866 diff changeset	1402 cls.__init__(self, *args)
77e0f4718a7c Bug #1486663: don't reject keyword arguments for subclasses of builtin Georg Brandl <georg@python.org> parents: 39866 diff changeset	1403 try:
77e0f4718a7c Bug #1486663: don't reject keyword arguments for subclasses of builtin Georg Brandl <georg@python.org> parents: 39866 diff changeset	1404 Subclass(newarg=1)
77e0f4718a7c Bug #1486663: don't reject keyword arguments for subclasses of builtin Georg Brandl <georg@python.org> parents: 39866 diff changeset	1405 except TypeError, err:
77e0f4718a7c Bug #1486663: don't reject keyword arguments for subclasses of builtin Georg Brandl <georg@python.org> parents: 39866 diff changeset	1406 # we expect type errors because of wrong argument count
58460 17891566a478 use assert[Not]In where appropriate Ezio Melotti <ezio.melotti@gmail.com> parents: 58198 diff changeset	1407 self.assertNotIn("does not take keyword arguments", err.args[0])
40682 77e0f4718a7c Bug #1486663: don't reject keyword arguments for subclasses of builtin Georg Brandl <georg@python.org> parents: 39866 diff changeset	1408
77e0f4718a7c Bug #1486663: don't reject keyword arguments for subclasses of builtin Georg Brandl <georg@python.org> parents: 39866 diff changeset	1409
29303 e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1410 libreftest = """ Doctest for examples in the library reference: libitertools.tex
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1411
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1412
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1413 >>> amounts = [120.15, 764.05, 823.14]
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1414 >>> for checknum, amount in izip(count(1200), amounts):
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1415 ... print 'Check %d is for $%.2f' % (checknum, amount)
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1416 ...
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1417 Check 1200 is for $120.15
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1418 Check 1201 is for $764.05
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1419 Check 1202 is for $823.14
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1420
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1421 >>> import operator
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1422 >>> for cube in imap(operator.pow, xrange(1,4), repeat(3)):
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1423 ... print cube
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1424 ...
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1425 1
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1426 8
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1427 27
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1428
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1429 >>> reportlines = ['EuroPython', 'Roster', '', 'alex', '', 'laura', '', 'martin', '', 'walter', '', 'samuele']
29627 e1fa07bf8548 Add take() to examples. Tighten the islice() example Raymond Hettinger <python@rcn.com> parents: 29535 diff changeset	1430 >>> for name in islice(reportlines, 3, None, 2):
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1431 ... print name.title()
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1432 ...
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1433 Alex
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1434 Laura
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1435 Martin
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1436 Walter
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1437 Samuele
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1438
31136 fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	1439 >>> from operator import itemgetter
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	1440 >>> d = dict(a=1, b=2, c=1, d=2, e=1, f=2, g=3)
38464 e989ee5d404a ("Forward-port" of r46506) Armin Rigo <arigo@tunes.org> parents: 35636 diff changeset	1441 >>> di = sorted(sorted(d.iteritems()), key=itemgetter(1))
31136 fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	1442 >>> for k, g in groupby(di, itemgetter(1)):
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	1443 ... print k, map(itemgetter(0), g)
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	1444 ...
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	1445 1 ['a', 'c', 'e']
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	1446 2 ['b', 'd', 'f']
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	1447 3 ['g']
fde74fadf780 Implement itertools.groupby() Raymond Hettinger <python@rcn.com> parents: 30900 diff changeset	1448
31401 897de9208199 Add a Guido inspired example for groupby(). Raymond Hettinger <python@rcn.com> parents: 31210 diff changeset	1449 # Find runs of consecutive numbers using groupby. The key to the solution
897de9208199 Add a Guido inspired example for groupby(). Raymond Hettinger <python@rcn.com> parents: 31210 diff changeset	1450 # is differencing with a range so that consecutive numbers all appear in
897de9208199 Add a Guido inspired example for groupby(). Raymond Hettinger <python@rcn.com> parents: 31210 diff changeset	1451 # same group.
897de9208199 Add a Guido inspired example for groupby(). Raymond Hettinger <python@rcn.com> parents: 31210 diff changeset	1452 >>> data = [ 1, 4,5,6, 10, 15,16,17,18, 22, 25,26,27,28]
63556 dba99828d91c Merged revisions 77942,79023 via svnmerge from Ezio Melotti <ezio.melotti@gmail.com> parents: 57517 diff changeset	1453 >>> for k, g in groupby(enumerate(data), lambda t:t[0]-t[1]):
31401 897de9208199 Add a Guido inspired example for groupby(). Raymond Hettinger <python@rcn.com> parents: 31210 diff changeset	1454 ... print map(operator.itemgetter(1), g)
897de9208199 Add a Guido inspired example for groupby(). Raymond Hettinger <python@rcn.com> parents: 31210 diff changeset	1455 ...
897de9208199 Add a Guido inspired example for groupby(). Raymond Hettinger <python@rcn.com> parents: 31210 diff changeset	1456 [1]
897de9208199 Add a Guido inspired example for groupby(). Raymond Hettinger <python@rcn.com> parents: 31210 diff changeset	1457 [4, 5, 6]
897de9208199 Add a Guido inspired example for groupby(). Raymond Hettinger <python@rcn.com> parents: 31210 diff changeset	1458 [10]
897de9208199 Add a Guido inspired example for groupby(). Raymond Hettinger <python@rcn.com> parents: 31210 diff changeset	1459 [15, 16, 17, 18]
897de9208199 Add a Guido inspired example for groupby(). Raymond Hettinger <python@rcn.com> parents: 31210 diff changeset	1460 [22]
897de9208199 Add a Guido inspired example for groupby(). Raymond Hettinger <python@rcn.com> parents: 31210 diff changeset	1461 [25, 26, 27, 28]
897de9208199 Add a Guido inspired example for groupby(). Raymond Hettinger <python@rcn.com> parents: 31210 diff changeset	1462
48033 43c6934514d7 Clean-up itertools docs and recipes. Raymond Hettinger <python@rcn.com> parents: 48032 diff changeset	1463 >>> def take(n, iterable):
43c6934514d7 Clean-up itertools docs and recipes. Raymond Hettinger <python@rcn.com> parents: 48032 diff changeset	1464 ... "Return first n items of the iterable as a list"
43c6934514d7 Clean-up itertools docs and recipes. Raymond Hettinger <python@rcn.com> parents: 48032 diff changeset	1465 ... return list(islice(iterable, n))
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1466
48033 43c6934514d7 Clean-up itertools docs and recipes. Raymond Hettinger <python@rcn.com> parents: 48032 diff changeset	1467 >>> def enumerate(iterable, start=0):
43c6934514d7 Clean-up itertools docs and recipes. Raymond Hettinger <python@rcn.com> parents: 48032 diff changeset	1468 ... return izip(count(start), iterable)
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1469
48033 43c6934514d7 Clean-up itertools docs and recipes. Raymond Hettinger <python@rcn.com> parents: 48032 diff changeset	1470 >>> def tabulate(function, start=0):
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1471 ... "Return function(0), function(1), ..."
48033 43c6934514d7 Clean-up itertools docs and recipes. Raymond Hettinger <python@rcn.com> parents: 48032 diff changeset	1472 ... return imap(function, count(start))
27769 dc5e1d918055 C Code: Raymond Hettinger <python@rcn.com> parents: 27747 diff changeset	1473
51725 d47c258a1e1c Add some cross-references to the docs. Simplify the python code equivalent for izip(). Supply an optional argument for the nth() recipe. Raymond Hettinger <python@rcn.com> parents: 51318 diff changeset	1474 >>> def nth(iterable, n, default=None):
d47c258a1e1c Add some cross-references to the docs. Simplify the python code equivalent for izip(). Supply an optional argument for the nth() recipe. Raymond Hettinger <python@rcn.com> parents: 51318 diff changeset	1475 ... "Returns the nth item or a default value"
d47c258a1e1c Add some cross-references to the docs. Simplify the python code equivalent for izip(). Supply an optional argument for the nth() recipe. Raymond Hettinger <python@rcn.com> parents: 51318 diff changeset	1476 ... return next(islice(iterable, n, None), default)
27769 dc5e1d918055 C Code: Raymond Hettinger <python@rcn.com> parents: 27747 diff changeset	1477
48033 43c6934514d7 Clean-up itertools docs and recipes. Raymond Hettinger <python@rcn.com> parents: 48032 diff changeset	1478 >>> def quantify(iterable, pred=bool):
43c6934514d7 Clean-up itertools docs and recipes. Raymond Hettinger <python@rcn.com> parents: 48032 diff changeset	1479 ... "Count how many times the predicate is true"
43c6934514d7 Clean-up itertools docs and recipes. Raymond Hettinger <python@rcn.com> parents: 48032 diff changeset	1480 ... return sum(imap(pred, iterable))
30092 d4cce553478a Re-sync doc tests with the doc updates. Raymond Hettinger <python@rcn.com> parents: 29690 diff changeset	1481
48033 43c6934514d7 Clean-up itertools docs and recipes. Raymond Hettinger <python@rcn.com> parents: 48032 diff changeset	1482 >>> def padnone(iterable):
28929 92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1483 ... "Returns the sequence elements and then returns None indefinitely"
48033 43c6934514d7 Clean-up itertools docs and recipes. Raymond Hettinger <python@rcn.com> parents: 48032 diff changeset	1484 ... return chain(iterable, repeat(None))
28929 92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1485
48033 43c6934514d7 Clean-up itertools docs and recipes. Raymond Hettinger <python@rcn.com> parents: 48032 diff changeset	1486 >>> def ncycles(iterable, n):
68588 cd8d3c2d3bce #11565: Fix several typos. Patch by Piotr Kasprzyk. Ezio Melotti <ezio.melotti@gmail.com> parents: 68256 diff changeset	1487 ... "Returns the sequence elements n times"
48033 43c6934514d7 Clean-up itertools docs and recipes. Raymond Hettinger <python@rcn.com> parents: 48032 diff changeset	1488 ... return chain(*repeat(iterable, n))
28929 92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1489
92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1490 >>> def dotproduct(vec1, vec2):
92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1491 ... return sum(imap(operator.mul, vec1, vec2))
92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1492
30764 b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1493 >>> def flatten(listOfLists):
45701 5f49b569dedf Tweak recipes and tests Raymond Hettinger <python@rcn.com> parents: 45699 diff changeset	1494 ... return list(chain.from_iterable(listOfLists))
30764 b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1495
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1496 >>> def repeatfunc(func, times=None, *args):
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1497 ... "Repeat calls to func with specified arguments."
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1498 ... " Example: repeatfunc(random.random)"
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1499 ... if times is None:
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1500 ... return starmap(func, repeat(args))
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1501 ... else:
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1502 ... return starmap(func, repeat(args, times))
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1503
30787 ea058504104c Replace the window() example with pairwise() which demonstrates tee(). Raymond Hettinger <python@rcn.com> parents: 30786 diff changeset	1504 >>> def pairwise(iterable):
ea058504104c Replace the window() example with pairwise() which demonstrates tee(). Raymond Hettinger <python@rcn.com> parents: 30786 diff changeset	1505 ... "s -> (s0,s1), (s1,s2), (s2, s3), ..."
ea058504104c Replace the window() example with pairwise() which demonstrates tee(). Raymond Hettinger <python@rcn.com> parents: 30786 diff changeset	1506 ... a, b = tee(iterable)
45701 5f49b569dedf Tweak recipes and tests Raymond Hettinger <python@rcn.com> parents: 45699 diff changeset	1507 ... for elem in b:
5f49b569dedf Tweak recipes and tests Raymond Hettinger <python@rcn.com> parents: 45699 diff changeset	1508 ... break
30900 3096fab2a19c Improve the implementation of itertools.tee(). Raymond Hettinger <python@rcn.com> parents: 30787 diff changeset	1509 ... return izip(a, b)
28929 92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1510
45701 5f49b569dedf Tweak recipes and tests Raymond Hettinger <python@rcn.com> parents: 45699 diff changeset	1511 >>> def grouper(n, iterable, fillvalue=None):
48098 689b5e8ae69d Neaten-up the itertools recipes. Raymond Hettinger <python@rcn.com> parents: 48033 diff changeset	1512 ... "grouper(3, 'ABCDEFG', 'x') --> ABC DEF Gxx"
45701 5f49b569dedf Tweak recipes and tests Raymond Hettinger <python@rcn.com> parents: 45699 diff changeset	1513 ... args = [iter(iterable)] * n
48108 5db43284ea7a Alter recipe to show how to call izip_longest() with Raymond Hettinger <python@rcn.com> parents: 48098 diff changeset	1514 ... return izip_longest(fillvalue=fillvalue, *args)
45698 44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1515
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1516 >>> def roundrobin(*iterables):
48098 689b5e8ae69d Neaten-up the itertools recipes. Raymond Hettinger <python@rcn.com> parents: 48033 diff changeset	1517 ... "roundrobin('ABC', 'D', 'EF') --> A D E B F C"
45698 44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1518 ... # Recipe credited to George Sakkis
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1519 ... pending = len(iterables)
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1520 ... nexts = cycle(iter(it).next for it in iterables)
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1521 ... while pending:
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1522 ... try:
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1523 ... for next in nexts:
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1524 ... yield next()
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1525 ... except StopIteration:
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1526 ... pending -= 1
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1527 ... nexts = cycle(islice(nexts, pending))
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1528
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1529 >>> def powerset(iterable):
51060 04a33c47abb5 Backport r68942: update powerset() recipe. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	1530 ... "powerset([1,2,3]) --> () (1,) (2,) (3,) (1,2) (1,3) (2,3) (1,2,3)"
04a33c47abb5 Backport r68942: update powerset() recipe. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	1531 ... s = list(iterable)
04a33c47abb5 Backport r68942: update powerset() recipe. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	1532 ... return chain.from_iterable(combinations(s, r) for r in range(len(s)+1))
45698 44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1533
50465 eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1534 >>> def unique_everseen(iterable, key=None):
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1535 ... "List unique elements, preserving order. Remember all elements ever seen."
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1536 ... # unique_everseen('AAAABBBCCDAABBB') --> A B C D
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1537 ... # unique_everseen('ABBCcAD', str.lower) --> A B C D
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1538 ... seen = set()
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1539 ... seen_add = seen.add
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1540 ... if key is None:
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1541 ... for element in iterable:
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1542 ... if element not in seen:
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1543 ... seen_add(element)
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1544 ... yield element
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1545 ... else:
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1546 ... for element in iterable:
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1547 ... k = key(element)
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1548 ... if k not in seen:
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1549 ... seen_add(k)
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1550 ... yield element
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1551
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1552 >>> def unique_justseen(iterable, key=None):
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1553 ... "List unique elements, preserving order. Remember only the element just seen."
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1554 ... # unique_justseen('AAAABBBCCDAABBB') --> A B C D A B
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1555 ... # unique_justseen('ABBCcAD', str.lower) --> A B C A D
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1556 ... return imap(next, imap(itemgetter(1), groupby(iterable, key)))
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1557
28929 92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1558 This is not part of the examples but it tests to make sure the definitions
92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1559 perform as purported.
92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1560
30381 a52a074e8ae5 Add an example to address a common question of how to split iterators. Raymond Hettinger <python@rcn.com> parents: 30238 diff changeset	1561 >>> take(10, count())
a52a074e8ae5 Add an example to address a common question of how to split iterators. Raymond Hettinger <python@rcn.com> parents: 30238 diff changeset	1562 [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
a52a074e8ae5 Add an example to address a common question of how to split iterators. Raymond Hettinger <python@rcn.com> parents: 30238 diff changeset	1563
28929 92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1564 >>> list(enumerate('abc'))
92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1565 [(0, 'a'), (1, 'b'), (2, 'c')]
92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1566
92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1567 >>> list(islice(tabulate(lambda x: 2*x), 4))
92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1568 [0, 2, 4, 6]
92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1569
92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1570 >>> nth('abcde', 3)
51318 473eb370de2c Minor doc fixes. Raymond Hettinger <python@rcn.com> parents: 51105 diff changeset	1571 'd'
28929 92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1572
51318 473eb370de2c Minor doc fixes. Raymond Hettinger <python@rcn.com> parents: 51105 diff changeset	1573 >>> nth('abcde', 9) is None
28929 92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1574 True
92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1575
30650 ca030320963f Adopt Christian Stork's suggested argument order for the logic quantifiers. Raymond Hettinger <python@rcn.com> parents: 30419 diff changeset	1576 >>> quantify(xrange(99), lambda x: x%2==0)
30093 0ac4396b1894 Modified itertools.izip() to match the behavior of __builtin__.zip() Raymond Hettinger <python@rcn.com> parents: 30092 diff changeset	1577 50
0ac4396b1894 Modified itertools.izip() to match the behavior of __builtin__.zip() Raymond Hettinger <python@rcn.com> parents: 30092 diff changeset	1578
30764 b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1579 >>> a = [[1, 2, 3], [4, 5, 6]]
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1580 >>> flatten(a)
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1581 [1, 2, 3, 4, 5, 6]
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1582
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1583 >>> list(repeatfunc(pow, 5, 2, 3))
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1584 [8, 8, 8, 8, 8]
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1585
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1586 >>> import random
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1587 >>> take(5, imap(int, repeatfunc(random.random)))
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1588 [0, 0, 0, 0, 0]
b948e775a79e Added itertools.tee() Raymond Hettinger <python@rcn.com> parents: 30650 diff changeset	1589
30787 ea058504104c Replace the window() example with pairwise() which demonstrates tee(). Raymond Hettinger <python@rcn.com> parents: 30786 diff changeset	1590 >>> list(pairwise('abcd'))
ea058504104c Replace the window() example with pairwise() which demonstrates tee(). Raymond Hettinger <python@rcn.com> parents: 30786 diff changeset	1591 [('a', 'b'), ('b', 'c'), ('c', 'd')]
28929 92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1592
30787 ea058504104c Replace the window() example with pairwise() which demonstrates tee(). Raymond Hettinger <python@rcn.com> parents: 30786 diff changeset	1593 >>> list(pairwise([]))
ea058504104c Replace the window() example with pairwise() which demonstrates tee(). Raymond Hettinger <python@rcn.com> parents: 30786 diff changeset	1594 []
ea058504104c Replace the window() example with pairwise() which demonstrates tee(). Raymond Hettinger <python@rcn.com> parents: 30786 diff changeset	1595
ea058504104c Replace the window() example with pairwise() which demonstrates tee(). Raymond Hettinger <python@rcn.com> parents: 30786 diff changeset	1596 >>> list(pairwise('a'))
29535 c64687cd5b37 Minor updates: Raymond Hettinger <python@rcn.com> parents: 29303 diff changeset	1597 []
c64687cd5b37 Minor updates: Raymond Hettinger <python@rcn.com> parents: 29303 diff changeset	1598
28929 92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1599 >>> list(islice(padnone('abc'), 0, 6))
92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1600 ['a', 'b', 'c', None, None, None]
92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1601
92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1602 >>> list(ncycles('abc', 3))
92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1603 ['a', 'b', 'c', 'a', 'b', 'c', 'a', 'b', 'c']
92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1604
92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1605 >>> dotproduct([1,2,3], [4,5,6])
92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1606 32
92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1607
45698 44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1608 >>> list(grouper(3, 'abcdefg', 'x'))
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1609 [('a', 'b', 'c'), ('d', 'e', 'f'), ('g', 'x', 'x')]
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1610
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1611 >>> list(roundrobin('abc', 'd', 'ef'))
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1612 ['a', 'd', 'e', 'b', 'f', 'c']
44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1613
51060 04a33c47abb5 Backport r68942: update powerset() recipe. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	1614 >>> list(powerset([1,2,3]))
04a33c47abb5 Backport r68942: update powerset() recipe. Raymond Hettinger <python@rcn.com> parents: 50630 diff changeset	1615 [(), (1,), (2,), (3,), (1, 2), (1, 3), (2, 3), (1, 2, 3)]
45698 44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1616
51119 9a4fdbcf2d9f Add more tests for the powerset() recipe. Raymond Hettinger <python@rcn.com> parents: 51114 diff changeset	1617 >>> all(len(list(powerset(range(n)))) == 2**n for n in range(18))
50630 0b8d2cf3f55b - Issue 4816: itertools.combinations() and itertools.product were raising Raymond Hettinger <python@rcn.com> parents: 50465 diff changeset	1618 True
0b8d2cf3f55b - Issue 4816: itertools.combinations() and itertools.product were raising Raymond Hettinger <python@rcn.com> parents: 50465 diff changeset	1619
51119 9a4fdbcf2d9f Add more tests for the powerset() recipe. Raymond Hettinger <python@rcn.com> parents: 51114 diff changeset	1620 >>> list(powerset('abcde')) == sorted(sorted(set(powerset('abcde'))), key=len)
50630 0b8d2cf3f55b - Issue 4816: itertools.combinations() and itertools.product were raising Raymond Hettinger <python@rcn.com> parents: 50465 diff changeset	1621 True
0b8d2cf3f55b - Issue 4816: itertools.combinations() and itertools.product were raising Raymond Hettinger <python@rcn.com> parents: 50465 diff changeset	1622
50465 eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1623 >>> list(unique_everseen('AAAABBBCCDAABBB'))
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1624 ['A', 'B', 'C', 'D']
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1625
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1626 >>> list(unique_everseen('ABBCcAD', str.lower))
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1627 ['A', 'B', 'C', 'D']
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1628
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1629 >>> list(unique_justseen('AAAABBBCCDAABBB'))
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1630 ['A', 'B', 'C', 'D', 'A', 'B']
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1631
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1632 >>> list(unique_justseen('ABBCcAD', str.lower))
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1633 ['A', 'B', 'C', 'A', 'D']
eb358dae0cca Issue #4615. Document how to use itertools for de-duping. Raymond Hettinger <python@rcn.com> parents: 48108 diff changeset	1634
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1635 """
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1636
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1637 __test__ = {'libreftest' : libreftest}
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1638
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1639 def test_main(verbose=None):
30238 a570bb9f133f SF bug #793826: using itertools.izip to mutate tuples Raymond Hettinger <python@rcn.com> parents: 30093 diff changeset	1640 test_classes = (TestBasicOps, TestVariousIteratorArgs, TestGC,
40682 77e0f4718a7c Bug #1486663: don't reject keyword arguments for subclasses of builtin Georg Brandl <georg@python.org> parents: 39866 diff changeset	1641 RegressionTests, LengthTransparency,
45698 44aa59f8591d More tests. Raymond Hettinger <python@rcn.com> parents: 45675 diff changeset	1642 SubclassWithKwargsTest, TestExamples)
29303 e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1643 test_support.run_unittest(*test_classes)
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1644
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1645 # verify reference counting
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1646 if verbose and hasattr(sys, "gettotalrefcount"):
29690 72dcc63f4dea More tests Raymond Hettinger <python@rcn.com> parents: 29627 diff changeset	1647 import gc
28936 2eee9655d71b Add StopIteration tests. Raymond Hettinger <python@rcn.com> parents: 28930 diff changeset	1648 counts = [None] * 5
2eee9655d71b Add StopIteration tests. Raymond Hettinger <python@rcn.com> parents: 28930 diff changeset	1649 for i in xrange(len(counts)):
29303 e3aefeba4116 Test ability to handle various type of iterators. Raymond Hettinger <python@rcn.com> parents: 29139 diff changeset	1650 test_support.run_unittest(*test_classes)
29690 72dcc63f4dea More tests Raymond Hettinger <python@rcn.com> parents: 29627 diff changeset	1651 gc.collect()
28936 2eee9655d71b Add StopIteration tests. Raymond Hettinger <python@rcn.com> parents: 28930 diff changeset	1652 counts[i] = sys.gettotalrefcount()
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1653 print counts
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1654
28929 92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1655 # doctest the examples in the library reference
29139 ae04a73bf8fc Minor cleanups. Raymond Hettinger <python@rcn.com> parents: 28945 diff changeset	1656 test_support.run_doctest(sys.modules[__name__], verbose)
28929 92a1e585abf7 SF bug #730685: itertools.islice stop argument is not optional Raymond Hettinger <python@rcn.com> parents: 28917 diff changeset	1657
27570 ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1658 if __name__ == "__main__":
ba57c3daf6e9 Move itertools module from the sandbox and into production. Raymond Hettinger <python@rcn.com> parents: diff changeset	1659 test_main(verbose=True)

Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_itertools.py @ 79675:c0a2294de787 2.7