cpython-lru_cache-weakref: Demo/classes/Rat.py annotate

annotate Demo/classes/Rat.py @ 5817:48b94de85bf3 legacy-trunk

Extensive changes by AMK.

author	Guido van Rossum <guido@python.org>
date	Thu, 17 Jul 1997 16:29:42 +0000
parents	ba005e4db4c5
children	c447d1ad7851

rev	line source
5503 ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	1 '''\
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	2 This module implements rational numbers.
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	3
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	4 The entry point of this module is the function
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	5 rat(numerator, denominator)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	6 If either numerator or denominator is of an integral or rational type,
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	7 the result is a rational number, else, the result is the simplest of
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	8 the types float and complex which can hold numerator/denominator.
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	9 If denominator is omitted, it defaults to 1.
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	10 Rational numbers can be used in calculations with any other numeric
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	11 type. The result of the calculation will be rational if possible.
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	12
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	13 There is also a test function with calling sequence
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	14 test()
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	15 The documentation string of the test function contains the expected
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	16 output.
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	17 '''
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	18
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	19 # Contributed by Sjoerd Mullender
945 465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	20
1966 dd7be8128410 adapted to new overloading scheme Guido van Rossum <guido@python.org> parents: 1427 diff changeset	21 from types import *
945 465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	22
465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	23 def gcd(a, b):
5503 ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	24 '''Calculate the Greatest Common Divisor.'''
945 465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	25 while b:
465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	26 a, b = b, a%b
465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	27 return a
465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	28
5503 ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	29 def rat(num, den = 1):
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	30 # must check complex before float
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	31 if type(num) is ComplexType or type(den) is ComplexType:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	32 # numerator or denominator is complex: return a complex
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	33 return complex(num) / complex(den)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	34 if type(num) is FloatType or type(den) is FloatType:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	35 # numerator or denominator is float: return a float
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	36 return float(num) / float(den)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	37 # otherwise return a rational
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	38 return Rat(num, den)
945 465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	39
465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	40 class Rat:
5503 ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	41 '''This class implements rational numbers.'''
945 465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	42
5503 ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	43 def __init__(self, num, den = 1):
945 465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	44 if den == 0:
465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	45 raise ZeroDivisionError, 'rat(x, 0)'
5503 ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	46
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	47 # normalize
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	48
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	49 # must check complex before float
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	50 if type(num) is ComplexType or type(den) is ComplexType:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	51 # numerator or denominator is complex:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	52 # normalized form has denominator == 1+0j
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	53 self.__num = complex(num) / complex(den)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	54 self.__den = complex(1)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	55 return
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	56 if type(num) is FloatType or type(den) is FloatType:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	57 # numerator or denominator is float:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	58 # normalized form has denominator == 1.0
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	59 self.__num = float(num) / float(den)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	60 self.__den = 1.0
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	61 return
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	62 if (type(num) is InstanceType and
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	63 num.__class__ is self.__class__) or \
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	64 (type(den) is InstanceType and
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	65 den.__class__ is self.__class__):
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	66 # numerator or denominator is rational
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	67 new = num / den
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	68 if type(new) is not InstanceType or \
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	69 new.__class__ is not self.__class__:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	70 self.__num = new
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	71 if type(new) is ComplexType:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	72 self.__den = complex(1)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	73 else:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	74 self.__den = 1.0
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	75 else:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	76 self.__num = new.__num
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	77 self.__den = new.__den
1966 dd7be8128410 adapted to new overloading scheme Guido van Rossum <guido@python.org> parents: 1427 diff changeset	78 else:
5503 ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	79 # make sure numerator and denominator don't
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	80 # have common factors
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	81 # this also makes sure that denominator > 0
1966 dd7be8128410 adapted to new overloading scheme Guido van Rossum <guido@python.org> parents: 1427 diff changeset	82 g = gcd(num, den)
5503 ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	83 self.__num = num / g
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	84 self.__den = den / g
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	85 # try making numerator and denominator of IntType if they fit
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	86 try:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	87 numi = int(self.__num)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	88 deni = int(self.__den)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	89 except (OverflowError, TypeError):
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	90 pass
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	91 else:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	92 if self.__num == numi and self.__den == deni:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	93 self.__num = numi
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	94 self.__den = deni
945 465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	95
465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	96 def __repr__(self):
5503 ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	97 return 'Rat(%s,%s)' % (self.__num, self.__den)
1966 dd7be8128410 adapted to new overloading scheme Guido van Rossum <guido@python.org> parents: 1427 diff changeset	98
dd7be8128410 adapted to new overloading scheme Guido van Rossum <guido@python.org> parents: 1427 diff changeset	99 def __str__(self):
5503 ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	100 if self.__den == 1:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	101 return str(self.__num)
1966 dd7be8128410 adapted to new overloading scheme Guido van Rossum <guido@python.org> parents: 1427 diff changeset	102 else:
5503 ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	103 return '%s/%s' % (str(self.__num), str(self.__den))
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	104
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	105 # a + b
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	106 def __add__(a, b):
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	107 try:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	108 return rat(a.__num * b.__den + b.__num * a.__den,
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	109 a.__den * b.__den)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	110 except OverflowError:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	111 return rat(long(a.__num) * long(b.__den) +
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	112 long(b.__num) * long(a.__den),
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	113 long(a.__den) * long(b.__den))
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	114
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	115 def __radd__(b, a):
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	116 return Rat(a) + b
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	117
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	118 # a - b
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	119 def __sub__(a, b):
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	120 try:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	121 return rat(a.__num * b.__den - b.__num * a.__den,
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	122 a.__den * b.__den)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	123 except OverflowError:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	124 return rat(long(a.__num) * long(b.__den) -
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	125 long(b.__num) * long(a.__den),
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	126 long(a.__den) * long(b.__den))
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	127
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	128 def __rsub__(b, a):
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	129 return Rat(a) - b
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	130
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	131 # a * b
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	132 def __mul__(a, b):
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	133 try:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	134 return rat(a.__num * b.__num, a.__den * b.__den)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	135 except OverflowError:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	136 return rat(long(a.__num) * long(b.__num),
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	137 long(a.__den) * long(b.__den))
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	138
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	139 def __rmul__(b, a):
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	140 return Rat(a) * b
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	141
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	142 # a / b
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	143 def __div__(a, b):
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	144 try:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	145 return rat(a.__num * b.__den, a.__den * b.__num)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	146 except OverflowError:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	147 return rat(long(a.__num) * long(b.__den),
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	148 long(a.__den) * long(b.__num))
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	149
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	150 def __rdiv__(b, a):
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	151 return Rat(a) / b
945 465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	152
5503 ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	153 # a % b
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	154 def __mod__(a, b):
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	155 div = a / b
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	156 try:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	157 div = int(div)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	158 except OverflowError:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	159 div = long(div)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	160 return a - b * div
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	161
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	162 def __rmod__(b, a):
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	163 return Rat(a) % b
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	164
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	165 # a ** b
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	166 def __pow__(a, b):
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	167 if b.__den != 1:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	168 if type(a.__num) is ComplexType:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	169 a = complex(a)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	170 else:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	171 a = float(a)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	172 if type(b.__num) is ComplexType:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	173 b = complex(b)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	174 else:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	175 b = float(b)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	176 return a ** b
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	177 try:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	178 return rat(a.__num b.__num, a.__den b.__num)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	179 except OverflowError:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	180 return rat(long(a.__num) ** b.__num,
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	181 long(a.__den) ** b.__num)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	182
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	183 def __rpow__(b, a):
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	184 return Rat(a) ** b
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	185
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	186 # -a
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	187 def __neg__(a):
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	188 try:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	189 return rat(-a.__num, a.__den)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	190 except OverflowError:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	191 # a.__num == sys.maxint
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	192 return rat(-long(a.__num), a.__den)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	193
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	194 # abs(a)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	195 def __abs__(a):
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	196 return rat(abs(a.__num), a.__den)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	197
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	198 # int(a)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	199 def __int__(a):
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	200 return int(a.__num / a.__den)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	201
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	202 # long(a)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	203 def __long__(a):
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	204 return long(a.__num) / long(a.__den)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	205
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	206 # float(a)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	207 def __float__(a):
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	208 return float(a.__num) / float(a.__den)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	209
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	210 # complex(a)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	211 def __complex__(a):
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	212 return complex(a.__num) / complex(a.__den)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	213
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	214 # cmp(a,b)
945 465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	215 def __cmp__(a, b):
5503 ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	216 diff = a - b
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	217 if diff.__num < 0:
945 465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	218 return -1
5503 ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	219 elif diff.__num > 0:
945 465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	220 return 1
5503 ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	221 else:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	222 return 0
945 465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	223
5503 ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	224 def __rcmp__(b, a):
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	225 return cmp(Rat(a), b)
945 465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	226
5503 ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	227 # a != 0
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	228 def __nonzero__(a):
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	229 return a.__num != 0
945 465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	230
5503 ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	231 # coercion
945 465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	232 def __coerce__(a, b):
5503 ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	233 return a, Rat(b)
945 465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	234
465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	235 def test():
5503 ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	236 '''\
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	237 Test function for rat module.
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	238
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	239 The expected output is (module some differences in floating
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	240 precission):
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	241 -1
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	242 -1
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	243 0 0L 0.1 (0.1+0j)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	244 [Rat(1,2), Rat(-3,10), Rat(1,25), Rat(1,4)]
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	245 [Rat(-3,10), Rat(1,25), Rat(1,4), Rat(1,2)]
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	246 0
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	247 11/10
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	248 11/10
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	249 1.1
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	250 OK
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	251 2 1.5 3/2 (1.5+1.5j) 15707963/5000000
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	252 2 2 2.0 (2+0j)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	253
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	254 4 0 4 1 4 0
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	255 3.5 0.5 3.0 1.33333333333 2.82842712475 1
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	256 7/2 1/2 3 4/3 2.82842712475 1
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	257 (3.5+1.5j) (0.5-1.5j) (3+3j) (0.666666666667-0.666666666667j) (1.43248815986+2.43884761145j) 1
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	258 1.5 1 1.5 (1.5+0j)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	259
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	260 3.5 -0.5 3.0 0.75 2.25 -1
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	261 3.0 0.0 2.25 1.0 1.83711730709 0
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	262 3.0 0.0 2.25 1.0 1.83711730709 1
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	263 (3+1.5j) -1.5j (2.25+2.25j) (0.5-0.5j) (1.50768393746+1.04970907623j) -1
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	264 3/2 1 1.5 (1.5+0j)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	265
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	266 7/2 -1/2 3 3/4 9/4 -1
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	267 3.0 0.0 2.25 1.0 1.83711730709 -1
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	268 3 0 9/4 1 1.83711730709 0
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	269 (3+1.5j) -1.5j (2.25+2.25j) (0.5-0.5j) (1.50768393746+1.04970907623j) -1
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	270 (1.5+1.5j) (1.5+1.5j)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	271
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	272 (3.5+1.5j) (-0.5+1.5j) (3+3j) (0.75+0.75j) 4.5j -1
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	273 (3+1.5j) 1.5j (2.25+2.25j) (1+1j) (1.18235814075+2.85446505899j) 1
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	274 (3+1.5j) 1.5j (2.25+2.25j) (1+1j) (1.18235814075+2.85446505899j) 1
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	275 (3+3j) 0j 4.5j (1+0j) (-0.638110484918+0.705394566962j) 0
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	276 '''
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	277 print rat(-1L, 1)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	278 print rat(1, -1)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	279 a = rat(1, 10)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	280 print int(a), long(a), float(a), complex(a)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	281 b = rat(2, 5)
945 465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	282 l = [a+b, a-b, a*b, a/b]
465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	283 print l
465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	284 l.sort()
465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	285 print l
5503 ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	286 print rat(0, 1)
945 465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	287 print a+1
465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	288 print a+1L
465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	289 print a+1.0
1371 faaf3843b8bd Add coercions Guido van Rossum <guido@python.org> parents: 945 diff changeset	290 try:
5503 ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	291 print rat(1, 0)
1371 faaf3843b8bd Add coercions Guido van Rossum <guido@python.org> parents: 945 diff changeset	292 raise SystemError, 'should have been ZeroDivisionError'
faaf3843b8bd Add coercions Guido van Rossum <guido@python.org> parents: 945 diff changeset	293 except ZeroDivisionError:
faaf3843b8bd Add coercions Guido van Rossum <guido@python.org> parents: 945 diff changeset	294 print 'OK'
5503 ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	295 print rat(2), rat(1.5), rat(3, 2), rat(1.5+1.5j), rat(31415926,10000000)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	296 list = [2, 1.5, rat(3,2), 1.5+1.5j]
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	297 for i in list:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	298 print i,
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	299 if type(i) is not ComplexType:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	300 print int(i), float(i),
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	301 print complex(i)
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	302 print
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	303 for j in list:
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	304 print i + j, i - j, i * j, i / j, i ** j, cmp(i, j)
945 465b9841770e Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	305
5503 ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	306 if __name__ == '__main__':
ba005e4db4c5 A completely new Rat.py by Sjoerd. Guido van Rossum <guido@python.org> parents: 1966 diff changeset	307 test()

Mercurial > cpython-lru_cache-weakref

annotate Demo/classes/Rat.py @ 5817:48b94de85bf3 legacy-trunk