cpython-lru_cache-weakref: Lib/tokenize.py annotate

annotate Lib/tokenize.py @ 17322:bd110eadc19a legacy-trunk

One-liner critical fix from Jim Fulton: Eric's string-method crusade got the order backwards in a line (for .find()).

author	Tim Peters <tim.peters@gmail.com>
date	Thu, 05 Apr 2001 22:26:23 +0000
parents	707f95d05e69
children	7bc473b2c654

rev	line source
5173 ff4f8fa8a273 Fixed doc string, added __version__, fixed 1 bug. Guido van Rossum <guido@python.org> parents: 5172 diff changeset	1 """Tokenization help for Python programs.
558 cfb53322c9d1 Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	2
5266 1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	3 This module exports a function called 'tokenize()' that breaks a stream of
1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	4 text into Python tokens. It accepts a readline-like method which is called
1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	5 repeatedly to get the next line of input (or "" for EOF) and a "token-eater"
1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	6 function which is called once for each token found. The latter function is
1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	7 passed the token type, a string containing the token, the starting and
1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	8 ending (row, column) coordinates of the token, and the original line. It is
1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	9 designed to match the working of the Python tokenizer exactly, except that
6531 e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	10 it produces COMMENT tokens for comments and gives type OP for all operators."""
5173 ff4f8fa8a273 Fixed doc string, added __version__, fixed 1 bug. Guido van Rossum <guido@python.org> parents: 5172 diff changeset	11
16899 320fa50a1a7d Add __author__ and __credits__ variables. Ka-Ping Yee <ping@zesty.ca> parents: 16889 diff changeset	12 __author__ = 'Ka-Ping Yee <ping@lfw.org>'
16901 572b654bf4ed Better __credits__. Ka-Ping Yee <ping@zesty.ca> parents: 16899 diff changeset	13 __credits__ = \
572b654bf4ed Better __credits__. Ka-Ping Yee <ping@zesty.ca> parents: 16899 diff changeset	14 'GvR, ESR, Tim Peters, Thomas Wouters, Fred Drake, Skip Montanaro'
5173 ff4f8fa8a273 Fixed doc string, added __version__, fixed 1 bug. Guido van Rossum <guido@python.org> parents: 5172 diff changeset	15
6531 e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	16 import string, re
5172 31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	17 from token import *
558 cfb53322c9d1 Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	18
16889 0feb63490093 final round of __all__ lists (I hope) - skipped urllib2 because Moshe may be Skip Montanaro <skip@pobox.com> parents: 16514 diff changeset	19 import token
0feb63490093 final round of __all__ lists (I hope) - skipped urllib2 because Moshe may be Skip Montanaro <skip@pobox.com> parents: 16514 diff changeset	20 __all__ = [x for x in dir(token) if x[0] != '_'] + ["COMMENT", "tokenize", "NL"]
0feb63490093 final round of __all__ lists (I hope) - skipped urllib2 because Moshe may be Skip Montanaro <skip@pobox.com> parents: 16514 diff changeset	21 del token
0feb63490093 final round of __all__ lists (I hope) - skipped urllib2 because Moshe may be Skip Montanaro <skip@pobox.com> parents: 16514 diff changeset	22
5266 1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	23 COMMENT = N_TOKENS
1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	24 tok_name[COMMENT] = 'COMMENT'
7839 d4f5321b9d9e Differentiate between NEWLINE token (an official newline) and NL token Guido van Rossum <guido@python.org> parents: 6532 diff changeset	25 NL = N_TOKENS + 1
d4f5321b9d9e Differentiate between NEWLINE token (an official newline) and NL token Guido van Rossum <guido@python.org> parents: 6532 diff changeset	26 tok_name[NL] = 'NL'
16889 0feb63490093 final round of __all__ lists (I hope) - skipped urllib2 because Moshe may be Skip Montanaro <skip@pobox.com> parents: 16514 diff changeset	27 N_TOKENS += 2
5266 1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	28
16514 90c600a819e9 String method conversion. Eric S. Raymond <esr@thyrsus.com> parents: 15898 diff changeset	29 def group(*choices): return '(' + '\|'.join(choices) + ')'
6531 e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	30 def any(choices): return apply(group, choices) + ''
e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	31 def maybe(*choices): return apply(group, choices) + '?'
558 cfb53322c9d1 Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	32
6531 e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	33 Whitespace = r'[ \f\t]*'
e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	34 Comment = r'#[^\r\n]*'
e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	35 Ignore = Whitespace + any(r'\\\r?\n' + Whitespace) + maybe(Comment)
e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	36 Name = r'[a-zA-Z_]\w*'
e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	37
e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	38 Hexnumber = r'0[xX][\da-fA-F]*[lL]?'
e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	39 Octnumber = r'0[0-7]*[lL]?'
e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	40 Decnumber = r'[1-9]\d*[lL]?'
5266 1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	41 Intnumber = group(Hexnumber, Octnumber, Decnumber)
6531 e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	42 Exponent = r'[eE][-+]?\d+'
e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	43 Pointfloat = group(r'\d+\.\d*', r'\.\d+') + maybe(Exponent)
e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	44 Expfloat = r'[1-9]\d*' + Exponent
5266 1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	45 Floatnumber = group(Pointfloat, Expfloat)
6531 e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	46 Imagnumber = group(r'0[jJ]', r'[1-9]\d*[jJ]', Floatnumber + r'[jJ]')
5266 1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	47 Number = group(Imagnumber, Floatnumber, Intnumber)
558 cfb53322c9d1 Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	48
15080 0e0ea56e4be8 Possible fix for Skip's bug 116136 (sre recursion limit hit in tokenize.py). Tim Peters <tim.peters@gmail.com> parents: 14166 diff changeset	49 # Tail end of ' string.
0e0ea56e4be8 Possible fix for Skip's bug 116136 (sre recursion limit hit in tokenize.py). Tim Peters <tim.peters@gmail.com> parents: 14166 diff changeset	50 Single = r"[^'\\](?:\\.[^'\\])*'"
0e0ea56e4be8 Possible fix for Skip's bug 116136 (sre recursion limit hit in tokenize.py). Tim Peters <tim.peters@gmail.com> parents: 14166 diff changeset	51 # Tail end of " string.
0e0ea56e4be8 Possible fix for Skip's bug 116136 (sre recursion limit hit in tokenize.py). Tim Peters <tim.peters@gmail.com> parents: 14166 diff changeset	52 Double = r'[^"\\](?:\\.[^"\\])*"'
0e0ea56e4be8 Possible fix for Skip's bug 116136 (sre recursion limit hit in tokenize.py). Tim Peters <tim.peters@gmail.com> parents: 14166 diff changeset	53 # Tail end of ''' string.
0e0ea56e4be8 Possible fix for Skip's bug 116136 (sre recursion limit hit in tokenize.py). Tim Peters <tim.peters@gmail.com> parents: 14166 diff changeset	54 Single3 = r"[^'\\](?:(?:\\.\|'(?!''))[^'\\])*'''"
0e0ea56e4be8 Possible fix for Skip's bug 116136 (sre recursion limit hit in tokenize.py). Tim Peters <tim.peters@gmail.com> parents: 14166 diff changeset	55 # Tail end of """ string.
0e0ea56e4be8 Possible fix for Skip's bug 116136 (sre recursion limit hit in tokenize.py). Tim Peters <tim.peters@gmail.com> parents: 14166 diff changeset	56 Double3 = r'[^"\\](?:(?:\\.\|"(?!""))[^"\\])*"""'
15898 8366fcfb6090 Add tokenizer support and tests for u'', U"", uR'', Ur"", etc. Ka-Ping Yee <ping@zesty.ca> parents: 15873 diff changeset	57 Triple = group("[uU]?[rR]?'''", '[uU]?[rR]?"""')
15080 0e0ea56e4be8 Possible fix for Skip's bug 116136 (sre recursion limit hit in tokenize.py). Tim Peters <tim.peters@gmail.com> parents: 14166 diff changeset	58 # Single-line ' or " string.
15898 8366fcfb6090 Add tokenizer support and tests for u'', U"", uR'', Ur"", etc. Ka-Ping Yee <ping@zesty.ca> parents: 15873 diff changeset	59 String = group(r"[uU]?[rR]?'[^\n'\\](?:\\.[^\n'\\])*'",
8366fcfb6090 Add tokenizer support and tests for u'', U"", uR'', Ur"", etc. Ka-Ping Yee <ping@zesty.ca> parents: 15873 diff changeset	60 r'[uU]?[rR]?"[^\n"\\](?:\\.[^\n"\\])*"')
558 cfb53322c9d1 Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	61
15080 0e0ea56e4be8 Possible fix for Skip's bug 116136 (sre recursion limit hit in tokenize.py). Tim Peters <tim.peters@gmail.com> parents: 14166 diff changeset	62 # Because of leftmost-then-longest match semantics, be sure to put the
0e0ea56e4be8 Possible fix for Skip's bug 116136 (sre recursion limit hit in tokenize.py). Tim Peters <tim.peters@gmail.com> parents: 14166 diff changeset	63 # longest operators first (e.g., if = came before ==, == would get
0e0ea56e4be8 Possible fix for Skip's bug 116136 (sre recursion limit hit in tokenize.py). Tim Peters <tim.peters@gmail.com> parents: 14166 diff changeset	64 # recognized as two instances of =).
0e0ea56e4be8 Possible fix for Skip's bug 116136 (sre recursion limit hit in tokenize.py). Tim Peters <tim.peters@gmail.com> parents: 14166 diff changeset	65 Operator = group(r"\\=?", r">>=?", r"<<=?", r"<>", r"!=",
0e0ea56e4be8 Possible fix for Skip's bug 116136 (sre recursion limit hit in tokenize.py). Tim Peters <tim.peters@gmail.com> parents: 14166 diff changeset	66 r"[+\-*/%&\|^=<>]=?",
0e0ea56e4be8 Possible fix for Skip's bug 116136 (sre recursion limit hit in tokenize.py). Tim Peters <tim.peters@gmail.com> parents: 14166 diff changeset	67 r"~")
14166 e9c2f830f9ba Update for augmented assignment, tested & approved by Guido. Thomas Wouters <thomas@python.org> parents: 14021 diff changeset	68
558 cfb53322c9d1 Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	69 Bracket = '[][(){}]'
6531 e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	70 Special = group(r'\r?\n', r'[:;.,`]')
5172 31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	71 Funny = group(Operator, Bracket, Special)
558 cfb53322c9d1 Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	72
6531 e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	73 PlainToken = group(Number, Funny, String, Name)
5172 31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	74 Token = Ignore + PlainToken
558 cfb53322c9d1 Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	75
15080 0e0ea56e4be8 Possible fix for Skip's bug 116136 (sre recursion limit hit in tokenize.py). Tim Peters <tim.peters@gmail.com> parents: 14166 diff changeset	76 # First (or only) line of ' or " string.
15898 8366fcfb6090 Add tokenizer support and tests for u'', U"", uR'', Ur"", etc. Ka-Ping Yee <ping@zesty.ca> parents: 15873 diff changeset	77 ContStr = group(r"[uU]?[rR]?'[^\n'\\](?:\\.[^\n'\\])*" +
8366fcfb6090 Add tokenizer support and tests for u'', U"", uR'', Ur"", etc. Ka-Ping Yee <ping@zesty.ca> parents: 15873 diff changeset	78 group("'", r'\\\r?\n'),
8366fcfb6090 Add tokenizer support and tests for u'', U"", uR'', Ur"", etc. Ka-Ping Yee <ping@zesty.ca> parents: 15873 diff changeset	79 r'[uU]?[rR]?"[^\n"\\](?:\\.[^\n"\\])*' +
8366fcfb6090 Add tokenizer support and tests for u'', U"", uR'', Ur"", etc. Ka-Ping Yee <ping@zesty.ca> parents: 15873 diff changeset	80 group('"', r'\\\r?\n'))
6531 e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	81 PseudoExtras = group(r'\\\r?\n', Comment, Triple)
e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	82 PseudoToken = Whitespace + group(PseudoExtras, Number, Funny, ContStr, Name)
5266 1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	83
6531 e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	84 tokenprog, pseudoprog, single3prog, double3prog = map(
e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	85 re.compile, (Token, PseudoToken, Single3, Double3))
6532 d369629e8c27 New, fixed version with proper r"..." and R"..." support from Ka-Ping. Guido van Rossum <guido@python.org> parents: 6531 diff changeset	86 endprogs = {"'": re.compile(Single), '"': re.compile(Double),
6531 e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	87 "'''": single3prog, '"""': double3prog,
6532 d369629e8c27 New, fixed version with proper r"..." and R"..." support from Ka-Ping. Guido van Rossum <guido@python.org> parents: 6531 diff changeset	88 "r'''": single3prog, 'r"""': double3prog,
15898 8366fcfb6090 Add tokenizer support and tests for u'', U"", uR'', Ur"", etc. Ka-Ping Yee <ping@zesty.ca> parents: 15873 diff changeset	89 "u'''": single3prog, 'u"""': double3prog,
8366fcfb6090 Add tokenizer support and tests for u'', U"", uR'', Ur"", etc. Ka-Ping Yee <ping@zesty.ca> parents: 15873 diff changeset	90 "ur'''": single3prog, 'ur"""': double3prog,
8366fcfb6090 Add tokenizer support and tests for u'', U"", uR'', Ur"", etc. Ka-Ping Yee <ping@zesty.ca> parents: 15873 diff changeset	91 "R'''": single3prog, 'R"""': double3prog,
8366fcfb6090 Add tokenizer support and tests for u'', U"", uR'', Ur"", etc. Ka-Ping Yee <ping@zesty.ca> parents: 15873 diff changeset	92 "U'''": single3prog, 'U"""': double3prog,
8366fcfb6090 Add tokenizer support and tests for u'', U"", uR'', Ur"", etc. Ka-Ping Yee <ping@zesty.ca> parents: 15873 diff changeset	93 "uR'''": single3prog, 'uR"""': double3prog,
8366fcfb6090 Add tokenizer support and tests for u'', U"", uR'', Ur"", etc. Ka-Ping Yee <ping@zesty.ca> parents: 15873 diff changeset	94 "Ur'''": single3prog, 'Ur"""': double3prog,
8366fcfb6090 Add tokenizer support and tests for u'', U"", uR'', Ur"", etc. Ka-Ping Yee <ping@zesty.ca> parents: 15873 diff changeset	95 "UR'''": single3prog, 'UR"""': double3prog,
8366fcfb6090 Add tokenizer support and tests for u'', U"", uR'', Ur"", etc. Ka-Ping Yee <ping@zesty.ca> parents: 15873 diff changeset	96 'r': None, 'R': None, 'u': None, 'U': None}
5172 31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	97
31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	98 tabsize = 8
14021 5b34b70ecf22 Convert some old-style string exceptions to class exceptions. Fred Drake <fdrake@acm.org> parents: 7839 diff changeset	99
17178 707f95d05e69 Provide a StopTokenizing exception for conveniently exiting the loop. Ka-Ping Yee <ping@zesty.ca> parents: 16901 diff changeset	100 class TokenError(Exception): pass
707f95d05e69 Provide a StopTokenizing exception for conveniently exiting the loop. Ka-Ping Yee <ping@zesty.ca> parents: 16901 diff changeset	101
707f95d05e69 Provide a StopTokenizing exception for conveniently exiting the loop. Ka-Ping Yee <ping@zesty.ca> parents: 16901 diff changeset	102 class StopTokenizing(Exception): pass
14021 5b34b70ecf22 Convert some old-style string exceptions to class exceptions. Fred Drake <fdrake@acm.org> parents: 7839 diff changeset	103
5266 1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	104 def printtoken(type, token, (srow, scol), (erow, ecol), line): # for testing
1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	105 print "%d,%d-%d,%d:\t%s\t%s" % \
1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	106 (srow, scol, erow, ecol, tok_name[type], repr(token))
5172 31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	107
5266 1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	108 def tokenize(readline, tokeneater=printtoken):
17178 707f95d05e69 Provide a StopTokenizing exception for conveniently exiting the loop. Ka-Ping Yee <ping@zesty.ca> parents: 16901 diff changeset	109 try:
707f95d05e69 Provide a StopTokenizing exception for conveniently exiting the loop. Ka-Ping Yee <ping@zesty.ca> parents: 16901 diff changeset	110 tokenize_loop(readline, tokeneater)
707f95d05e69 Provide a StopTokenizing exception for conveniently exiting the loop. Ka-Ping Yee <ping@zesty.ca> parents: 16901 diff changeset	111 except StopTokenizing:
707f95d05e69 Provide a StopTokenizing exception for conveniently exiting the loop. Ka-Ping Yee <ping@zesty.ca> parents: 16901 diff changeset	112 pass
707f95d05e69 Provide a StopTokenizing exception for conveniently exiting the loop. Ka-Ping Yee <ping@zesty.ca> parents: 16901 diff changeset	113
707f95d05e69 Provide a StopTokenizing exception for conveniently exiting the loop. Ka-Ping Yee <ping@zesty.ca> parents: 16901 diff changeset	114 def tokenize_loop(readline, tokeneater):
5266 1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	115 lnum = parenlev = continued = 0
5172 31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	116 namechars, numchars = string.letters + '_', string.digits
5277 7df5a0d1f523 Ping's latest. Fixes triple quoted strings ending in odd Guido van Rossum <guido@python.org> parents: 5266 diff changeset	117 contstr, needcont = '', 0
7839 d4f5321b9d9e Differentiate between NEWLINE token (an official newline) and NL token Guido van Rossum <guido@python.org> parents: 6532 diff changeset	118 contline = None
5172 31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	119 indents = [0]
5266 1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	120
5172 31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	121 while 1: # loop over lines in stream
31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	122 line = readline()
5266 1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	123 lnum = lnum + 1
5172 31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	124 pos, max = 0, len(line)
558 cfb53322c9d1 Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	125
5172 31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	126 if contstr: # continued string
5277 7df5a0d1f523 Ping's latest. Fixes triple quoted strings ending in odd Guido van Rossum <guido@python.org> parents: 5266 diff changeset	127 if not line:
7df5a0d1f523 Ping's latest. Fixes triple quoted strings ending in odd Guido van Rossum <guido@python.org> parents: 5266 diff changeset	128 raise TokenError, ("EOF in multi-line string", strstart)
6531 e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	129 endmatch = endprog.match(line)
e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	130 if endmatch:
e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	131 pos = end = endmatch.end(0)
5266 1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	132 tokeneater(STRING, contstr + line[:end],
7839 d4f5321b9d9e Differentiate between NEWLINE token (an official newline) and NL token Guido van Rossum <guido@python.org> parents: 6532 diff changeset	133 strstart, (lnum, end), contline + line)
5277 7df5a0d1f523 Ping's latest. Fixes triple quoted strings ending in odd Guido van Rossum <guido@python.org> parents: 5266 diff changeset	134 contstr, needcont = '', 0
7839 d4f5321b9d9e Differentiate between NEWLINE token (an official newline) and NL token Guido van Rossum <guido@python.org> parents: 6532 diff changeset	135 contline = None
5277 7df5a0d1f523 Ping's latest. Fixes triple quoted strings ending in odd Guido van Rossum <guido@python.org> parents: 5266 diff changeset	136 elif needcont and line[-2:] != '\\\n' and line[-3:] != '\\\r\n':
7df5a0d1f523 Ping's latest. Fixes triple quoted strings ending in odd Guido van Rossum <guido@python.org> parents: 5266 diff changeset	137 tokeneater(ERRORTOKEN, contstr + line,
7839 d4f5321b9d9e Differentiate between NEWLINE token (an official newline) and NL token Guido van Rossum <guido@python.org> parents: 6532 diff changeset	138 strstart, (lnum, len(line)), contline)
5172 31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	139 contstr = ''
7839 d4f5321b9d9e Differentiate between NEWLINE token (an official newline) and NL token Guido van Rossum <guido@python.org> parents: 6532 diff changeset	140 contline = None
5277 7df5a0d1f523 Ping's latest. Fixes triple quoted strings ending in odd Guido van Rossum <guido@python.org> parents: 5266 diff changeset	141 continue
5172 31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	142 else:
31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	143 contstr = contstr + line
7839 d4f5321b9d9e Differentiate between NEWLINE token (an official newline) and NL token Guido van Rossum <guido@python.org> parents: 6532 diff changeset	144 contline = contline + line
5172 31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	145 continue
31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	146
5266 1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	147 elif parenlev == 0 and not continued: # new statement
5172 31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	148 if not line: break
31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	149 column = 0
5266 1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	150 while pos < max: # measure leading whitespace
5172 31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	151 if line[pos] == ' ': column = column + 1
5266 1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	152 elif line[pos] == '\t': column = (column/tabsize + 1)*tabsize
5172 31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	153 elif line[pos] == '\f': column = 0
31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	154 else: break
31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	155 pos = pos + 1
5277 7df5a0d1f523 Ping's latest. Fixes triple quoted strings ending in odd Guido van Rossum <guido@python.org> parents: 5266 diff changeset	156 if pos == max: break
5266 1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	157
1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	158 if line[pos] in '#\r\n': # skip comments or blank lines
7839 d4f5321b9d9e Differentiate between NEWLINE token (an official newline) and NL token Guido van Rossum <guido@python.org> parents: 6532 diff changeset	159 tokeneater((NL, COMMENT)[line[pos] == '#'], line[pos:],
5266 1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	160 (lnum, pos), (lnum, len(line)), line)
1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	161 continue
558 cfb53322c9d1 Initial revision Guido van Rossum <guido@python.org> parents: diff changeset	162
5172 31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	163 if column > indents[-1]: # count indents or dedents
31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	164 indents.append(column)
5266 1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	165 tokeneater(INDENT, line[:pos], (lnum, 0), (lnum, pos), line)
5172 31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	166 while column < indents[-1]:
31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	167 indents = indents[:-1]
5277 7df5a0d1f523 Ping's latest. Fixes triple quoted strings ending in odd Guido van Rossum <guido@python.org> parents: 5266 diff changeset	168 tokeneater(DEDENT, '', (lnum, pos), (lnum, pos), line)
5172 31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	169
31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	170 else: # continued statement
5277 7df5a0d1f523 Ping's latest. Fixes triple quoted strings ending in odd Guido van Rossum <guido@python.org> parents: 5266 diff changeset	171 if not line:
7df5a0d1f523 Ping's latest. Fixes triple quoted strings ending in odd Guido van Rossum <guido@python.org> parents: 5266 diff changeset	172 raise TokenError, ("EOF in multi-line statement", (lnum, 0))
5172 31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	173 continued = 0
31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	174
31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	175 while pos < max:
6531 e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	176 pseudomatch = pseudoprog.match(line, pos)
e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	177 if pseudomatch: # scan for tokens
e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	178 start, end = pseudomatch.span(1)
5277 7df5a0d1f523 Ping's latest. Fixes triple quoted strings ending in odd Guido van Rossum <guido@python.org> parents: 5266 diff changeset	179 spos, epos, pos = (lnum, start), (lnum, end), end
5266 1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	180 token, initial = line[start:end], line[start]
5172 31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	181
17178 707f95d05e69 Provide a StopTokenizing exception for conveniently exiting the loop. Ka-Ping Yee <ping@zesty.ca> parents: 16901 diff changeset	182 if initial in numchars or \
707f95d05e69 Provide a StopTokenizing exception for conveniently exiting the loop. Ka-Ping Yee <ping@zesty.ca> parents: 16901 diff changeset	183 (initial == '.' and token != '.'): # ordinary number
5266 1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	184 tokeneater(NUMBER, token, spos, epos, line)
1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	185 elif initial in '\r\n':
7839 d4f5321b9d9e Differentiate between NEWLINE token (an official newline) and NL token Guido van Rossum <guido@python.org> parents: 6532 diff changeset	186 tokeneater(parenlev > 0 and NL or NEWLINE,
d4f5321b9d9e Differentiate between NEWLINE token (an official newline) and NL token Guido van Rossum <guido@python.org> parents: 6532 diff changeset	187 token, spos, epos, line)
5266 1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	188 elif initial == '#':
1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	189 tokeneater(COMMENT, token, spos, epos, line)
6532 d369629e8c27 New, fixed version with proper r"..." and R"..." support from Ka-Ping. Guido van Rossum <guido@python.org> parents: 6531 diff changeset	190 elif token in ("'''", '"""', # triple-quoted
15898 8366fcfb6090 Add tokenizer support and tests for u'', U"", uR'', Ur"", etc. Ka-Ping Yee <ping@zesty.ca> parents: 15873 diff changeset	191 "r'''", 'r"""', "R'''", 'R"""',
8366fcfb6090 Add tokenizer support and tests for u'', U"", uR'', Ur"", etc. Ka-Ping Yee <ping@zesty.ca> parents: 15873 diff changeset	192 "u'''", 'u"""', "U'''", 'U"""',
8366fcfb6090 Add tokenizer support and tests for u'', U"", uR'', Ur"", etc. Ka-Ping Yee <ping@zesty.ca> parents: 15873 diff changeset	193 "ur'''", 'ur"""', "Ur'''", 'Ur"""',
8366fcfb6090 Add tokenizer support and tests for u'', U"", uR'', Ur"", etc. Ka-Ping Yee <ping@zesty.ca> parents: 15873 diff changeset	194 "uR'''", 'uR"""', "UR'''", 'UR"""'):
5172 31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	195 endprog = endprogs[token]
6531 e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	196 endmatch = endprog.match(line, pos)
e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	197 if endmatch: # all on one line
e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	198 pos = endmatch.end(0)
5266 1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	199 token = line[start:pos]
1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	200 tokeneater(STRING, token, spos, (lnum, pos), line)
5172 31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	201 else:
5266 1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	202 strstart = (lnum, start) # multiple lines
1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	203 contstr = line[start:]
7839 d4f5321b9d9e Differentiate between NEWLINE token (an official newline) and NL token Guido van Rossum <guido@python.org> parents: 6532 diff changeset	204 contline = line
5172 31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	205 break
6532 d369629e8c27 New, fixed version with proper r"..." and R"..." support from Ka-Ping. Guido van Rossum <guido@python.org> parents: 6531 diff changeset	206 elif initial in ("'", '"') or \
15898 8366fcfb6090 Add tokenizer support and tests for u'', U"", uR'', Ur"", etc. Ka-Ping Yee <ping@zesty.ca> parents: 15873 diff changeset	207 token[:2] in ("r'", 'r"', "R'", 'R"',
8366fcfb6090 Add tokenizer support and tests for u'', U"", uR'', Ur"", etc. Ka-Ping Yee <ping@zesty.ca> parents: 15873 diff changeset	208 "u'", 'u"', "U'", 'U"') or \
8366fcfb6090 Add tokenizer support and tests for u'', U"", uR'', Ur"", etc. Ka-Ping Yee <ping@zesty.ca> parents: 15873 diff changeset	209 token[:3] in ("ur'", 'ur"', "Ur'", 'Ur"',
8366fcfb6090 Add tokenizer support and tests for u'', U"", uR'', Ur"", etc. Ka-Ping Yee <ping@zesty.ca> parents: 15873 diff changeset	210 "uR'", 'uR"', "UR'", 'UR"' ):
5172 31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	211 if token[-1] == '\n': # continued string
5266 1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	212 strstart = (lnum, start)
15898 8366fcfb6090 Add tokenizer support and tests for u'', U"", uR'', Ur"", etc. Ka-Ping Yee <ping@zesty.ca> parents: 15873 diff changeset	213 endprog = (endprogs[initial] or endprogs[token[1]] or
8366fcfb6090 Add tokenizer support and tests for u'', U"", uR'', Ur"", etc. Ka-Ping Yee <ping@zesty.ca> parents: 15873 diff changeset	214 endprogs[token[2]])
5277 7df5a0d1f523 Ping's latest. Fixes triple quoted strings ending in odd Guido van Rossum <guido@python.org> parents: 5266 diff changeset	215 contstr, needcont = line[start:], 1
7839 d4f5321b9d9e Differentiate between NEWLINE token (an official newline) and NL token Guido van Rossum <guido@python.org> parents: 6532 diff changeset	216 contline = line
5172 31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	217 break
31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	218 else: # ordinary string
5266 1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	219 tokeneater(STRING, token, spos, epos, line)
6531 e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	220 elif initial in namechars: # ordinary name
e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	221 tokeneater(NAME, token, spos, epos, line)
e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	222 elif initial == '\\': # continued stmt
e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition Guido van Rossum <guido@python.org> parents: 5721 diff changeset	223 continued = 1
5172 31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	224 else:
5266 1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	225 if initial in '([{': parenlev = parenlev + 1
1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	226 elif initial in ')]}': parenlev = parenlev - 1
1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	227 tokeneater(OP, token, spos, epos, line)
5172 31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	228 else:
5277 7df5a0d1f523 Ping's latest. Fixes triple quoted strings ending in odd Guido van Rossum <guido@python.org> parents: 5266 diff changeset	229 tokeneater(ERRORTOKEN, line[pos],
7df5a0d1f523 Ping's latest. Fixes triple quoted strings ending in odd Guido van Rossum <guido@python.org> parents: 5266 diff changeset	230 (lnum, pos), (lnum, pos+1), line)
5172 31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	231 pos = pos + 1
31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	232
31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	233 for indent in indents[1:]: # pop remaining indent levels
5266 1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997: Guido van Rossum <guido@python.org> parents: 5178 diff changeset	234 tokeneater(DEDENT, '', (lnum, 0), (lnum, 0), '')
5277 7df5a0d1f523 Ping's latest. Fixes triple quoted strings ending in odd Guido van Rossum <guido@python.org> parents: 5266 diff changeset	235 tokeneater(ENDMARKER, '', (lnum, 0), (lnum, 0), '')
5172 31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	236
31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	237 if __name__ == '__main__': # testing
31b0e5f0badf Ka-Ping's version. Guido van Rossum <guido@python.org> parents: 1407 diff changeset	238 import sys
5277 7df5a0d1f523 Ping's latest. Fixes triple quoted strings ending in odd Guido van Rossum <guido@python.org> parents: 5266 diff changeset	239 if len(sys.argv) > 1: tokenize(open(sys.argv[1]).readline)
5721 138b176ec40f Correct typo in last line (test program invocation). Guido van Rossum <guido@python.org> parents: 5277 diff changeset	240 else: tokenize(sys.stdin.readline)

Mercurial > cpython-lru_cache-weakref

annotate Lib/tokenize.py @ 17322:bd110eadc19a legacy-trunk