Mercurial > cpython-lru_cache-weakref

annotate Lib/tokenize.py @ 25838:8540887bcec6 2.2

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Backport of 2.183: Fix memory leak in add_subclass() found by NealN with valgrind.
author Guido van Rossum <guido@python.org>
date Fri, 18 Oct 2002 13:42:21 +0000
parents a0005d26773d
children 1de7ac729bfa
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 """Tokenization help for Python programs.
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2
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3 generate_tokens(readline) is a generator that breaks a stream of
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4 text into Python tokens. It accepts a readline-like method which is called
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5 repeatedly to get the next line of input (or "" for EOF). It generates
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6 5-tuples with these members:
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7
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8 the token type (see token.py)
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9 the token (a string)
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10 the starting (row, column) indices of the token (a 2-tuple of ints)
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11 the ending (row, column) indices of the token (a 2-tuple of ints)
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12 the original line (string)
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13
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14 It is designed to match the working of the Python tokenizer exactly, except
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15 that it produces COMMENT tokens for comments and gives type OP for all
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16 operators
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17
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18 Older entry points
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19 tokenize_loop(readline, tokeneater)
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20 tokenize(readline, tokeneater=printtoken)
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21 are the same, except instead of generating tokens, tokeneater is a callback
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22 function to which the 5 fields described above are passed as 5 arguments,
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23 each time a new token is found."""
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24
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25 from __future__ import generators
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26
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27 __author__ = 'Ka-Ping Yee <ping@lfw.org>'
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28 __credits__ = \
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29 'GvR, ESR, Tim Peters, Thomas Wouters, Fred Drake, Skip Montanaro'
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30
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31 import string, re
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32 from token import *
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33
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34 import token
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35 __all__ = [x for x in dir(token) if x[0] != '_'] + ["COMMENT", "tokenize", "NL"]
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36 del token
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37
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38 COMMENT = N_TOKENS
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39 tok_name[COMMENT] = 'COMMENT'
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40 NL = N_TOKENS + 1
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41 tok_name[NL] = 'NL'
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42 N_TOKENS += 2
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43
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44 def group(*choices): return '(' + '|'.join(choices) + ')'
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45 def any(*choices): return apply(group, choices) + '*'
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46 def maybe(*choices): return apply(group, choices) + '?'
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48 Whitespace = r'[ \f\t]*'
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49 Comment = r'#[^\r\n]*'
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50 Ignore = Whitespace + any(r'\\\r?\n' + Whitespace) + maybe(Comment)
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51 Name = r'[a-zA-Z_]\w*'
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52
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53 Hexnumber = r'0[xX][\da-fA-F]*[lL]?'
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54 Octnumber = r'0[0-7]*[lL]?'
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55 Decnumber = r'[1-9]\d*[lL]?'
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56 Intnumber = group(Hexnumber, Octnumber, Decnumber)
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57 Exponent = r'[eE][-+]?\d+'
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58 Pointfloat = group(r'\d+\.\d*', r'\.\d+') + maybe(Exponent)
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59 Expfloat = r'\d+' + Exponent
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60 Floatnumber = group(Pointfloat, Expfloat)
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61 Imagnumber = group(r'\d+[jJ]', Floatnumber + r'[jJ]')
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62 Number = group(Imagnumber, Floatnumber, Intnumber)
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63
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64 # Tail end of ' string.
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65 Single = r"[^'\\]*(?:\\.[^'\\]*)*'"
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66 # Tail end of " string.
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67 Double = r'[^"\\]*(?:\\.[^"\\]*)*"'
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68 # Tail end of ''' string.
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69 Single3 = r"[^'\\]*(?:(?:\\.|'(?!''))[^'\\]*)*'''"
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70 # Tail end of """ string.
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71 Double3 = r'[^"\\]*(?:(?:\\.|"(?!""))[^"\\]*)*"""'
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72 Triple = group("[uU]?[rR]?'''", '[uU]?[rR]?"""')
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73 # Single-line ' or " string.
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74 String = group(r"[uU]?[rR]?'[^\n'\\]*(?:\\.[^\n'\\]*)*'",
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75 r'[uU]?[rR]?"[^\n"\\]*(?:\\.[^\n"\\]*)*"')
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77 # Because of leftmost-then-longest match semantics, be sure to put the
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78 # longest operators first (e.g., if = came before ==, == would get
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79 # recognized as two instances of =).
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80 Operator = group(r"\*\*=?", r">>=?", r"<<=?", r"<>", r"!=",
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81 r"//=?",
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82 r"[+\-*/%&|^=<>]=?",
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83 r"~")
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84
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85 Bracket = '[][(){}]'
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86 Special = group(r'\r?\n', r'[:;.,`]')
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87 Funny = group(Operator, Bracket, Special)
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89 PlainToken = group(Number, Funny, String, Name)
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90 Token = Ignore + PlainToken
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92 # First (or only) line of ' or " string.
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93 ContStr = group(r"[uU]?[rR]?'[^\n'\\]*(?:\\.[^\n'\\]*)*" +
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94 group("'", r'\\\r?\n'),
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95 r'[uU]?[rR]?"[^\n"\\]*(?:\\.[^\n"\\]*)*' +
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96 group('"', r'\\\r?\n'))
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97 PseudoExtras = group(r'\\\r?\n', Comment, Triple)
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98 PseudoToken = Whitespace + group(PseudoExtras, Number, Funny, ContStr, Name)
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99
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100 tokenprog, pseudoprog, single3prog, double3prog = map(
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101 re.compile, (Token, PseudoToken, Single3, Double3))
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102 endprogs = {"'": re.compile(Single), '"': re.compile(Double),
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103 "'''": single3prog, '"""': double3prog,
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104 "r'''": single3prog, 'r"""': double3prog,
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105 "u'''": single3prog, 'u"""': double3prog,
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106 "ur'''": single3prog, 'ur"""': double3prog,
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107 "R'''": single3prog, 'R"""': double3prog,
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108 "U'''": single3prog, 'U"""': double3prog,
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109 "uR'''": single3prog, 'uR"""': double3prog,
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110 "Ur'''": single3prog, 'Ur"""': double3prog,
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111 "UR'''": single3prog, 'UR"""': double3prog,
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112 'r': None, 'R': None, 'u': None, 'U': None}
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113
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114 tabsize = 8
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115
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116 class TokenError(Exception): pass
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117
707f95d05e69 Provide a StopTokenizing exception for conveniently exiting the loop.
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118 class StopTokenizing(Exception): pass
14021
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parents: 7839
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119
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120 def printtoken(type, token, (srow, scol), (erow, ecol), line): # for testing
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121 print "%d,%d-%d,%d:\t%s\t%s" % \
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122 (srow, scol, erow, ecol, tok_name[type], repr(token))
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123
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124 def tokenize(readline, tokeneater=printtoken):
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125 """
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126 The tokenize() function accepts two parameters: one representing the
64eb119b816d Add docstrings excerpted from the library reference.
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127 input stream, and one providing an output mechanism for tokenize().
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128
23456
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129 The first parameter, readline, must be a callable object which provides
64eb119b816d Add docstrings excerpted from the library reference.
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130 the same interface as the readline() method of built-in file objects.
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131 Each call to the function should return one line of input as a string.
23456
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132
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133 The second parameter, tokeneater, must also be a callable object. It is
64eb119b816d Add docstrings excerpted from the library reference.
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134 called once for each token, with five arguments, corresponding to the
25622
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parents: 23456
diff changeset
135 tuples generated by generate_tokens().
23456
64eb119b816d Add docstrings excerpted from the library reference.
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136 """
17178
707f95d05e69 Provide a StopTokenizing exception for conveniently exiting the loop.
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137 try:
707f95d05e69 Provide a StopTokenizing exception for conveniently exiting the loop.
Ka-Ping Yee <ping@zesty.ca>
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diff changeset
138 tokenize_loop(readline, tokeneater)
707f95d05e69 Provide a StopTokenizing exception for conveniently exiting the loop.
Ka-Ping Yee <ping@zesty.ca>
parents: 16901
diff changeset
139 except StopTokenizing:
707f95d05e69 Provide a StopTokenizing exception for conveniently exiting the loop.
Ka-Ping Yee <ping@zesty.ca>
parents: 16901
diff changeset
140 pass
707f95d05e69 Provide a StopTokenizing exception for conveniently exiting the loop.
Ka-Ping Yee <ping@zesty.ca>
parents: 16901
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141
18351
44a87c300f2b Turns out Neil didn't intend for *all* of his gen-branch work to get
Tim Peters <tim.peters@gmail.com>
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diff changeset
142 # backwards compatible interface
17178
707f95d05e69 Provide a StopTokenizing exception for conveniently exiting the loop.
Ka-Ping Yee <ping@zesty.ca>
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143 def tokenize_loop(readline, tokeneater):
18148
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144 for token_info in generate_tokens(readline):
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parents: 17178
diff changeset
145 apply(tokeneater, token_info)
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146
7bc473b2c654 Merging the gen-branch into the main line, at Guido's direction. Yay!
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147 def generate_tokens(readline):
23456
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148 """
64eb119b816d Add docstrings excerpted from the library reference.
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149 The generate_tokens() generator requires one argment, readline, which
64eb119b816d Add docstrings excerpted from the library reference.
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parents: 19621
diff changeset
150 must be a callable object which provides the same interface as the
64eb119b816d Add docstrings excerpted from the library reference.
Raymond Hettinger <python@rcn.com>
parents: 19621
diff changeset
151 readline() method of built-in file objects. Each call to the function
64eb119b816d Add docstrings excerpted from the library reference.
Raymond Hettinger <python@rcn.com>
parents: 19621
diff changeset
152 should return one line of input as a string.
25622
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Tim Peters <tim.peters@gmail.com>
parents: 23456
diff changeset
153
23456
64eb119b816d Add docstrings excerpted from the library reference.
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154 The generator produces 5-tuples with these members: the token type; the
64eb119b816d Add docstrings excerpted from the library reference.
Raymond Hettinger <python@rcn.com>
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diff changeset
155 token string; a 2-tuple (srow, scol) of ints specifying the row and
64eb119b816d Add docstrings excerpted from the library reference.
Raymond Hettinger <python@rcn.com>
parents: 19621
diff changeset
156 column where the token begins in the source; a 2-tuple (erow, ecol) of
64eb119b816d Add docstrings excerpted from the library reference.
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parents: 19621
diff changeset
157 ints specifying the row and column where the token ends in the source;
64eb119b816d Add docstrings excerpted from the library reference.
Raymond Hettinger <python@rcn.com>
parents: 19621
diff changeset
158 and the line on which the token was found. The line passed is the
25622
a0005d26773d Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 23456
diff changeset
159 logical line; continuation lines are included.
23456
64eb119b816d Add docstrings excerpted from the library reference.
Raymond Hettinger <python@rcn.com>
parents: 19621
diff changeset
160 """
5266
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diff changeset
161 lnum = parenlev = continued = 0
18781
01ae962df885 Use string.ascii_letters instead of string.letters (SF bug #226706).
Fred Drake <fdrake@acm.org>
parents: 18609
diff changeset
162 namechars, numchars = string.ascii_letters + '_', '0123456789'
5277
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diff changeset
163 contstr, needcont = '', 0
7839
d4f5321b9d9e Differentiate between NEWLINE token (an official newline) and NL token
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164 contline = None
5172
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diff changeset
165 indents = [0]
5266
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diff changeset
166
5172
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diff changeset
167 while 1: # loop over lines in stream
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168 line = readline()
5266
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diff changeset
169 lnum = lnum + 1
5172
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diff changeset
170 pos, max = 0, len(line)
558
cfb53322c9d1 Initial revision
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parents:
diff changeset
171
5172
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parents: 1407
diff changeset
172 if contstr: # continued string
5277
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diff changeset
173 if not line:
7df5a0d1f523 Ping's latest. Fixes triple quoted strings ending in odd
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diff changeset
174 raise TokenError, ("EOF in multi-line string", strstart)
6531
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parents: 5721
diff changeset
175 endmatch = endprog.match(line)
e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition
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176 if endmatch:
e497a7fc0aa8 Redone (by Ka-Ping) using the new re module, and adding recognition
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diff changeset
177 pos = end = endmatch.end(0)
18148
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parents: 17178
diff changeset
178 yield (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
179 strstart, (lnum, end), contline + line)
5277
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diff changeset
180 contstr, needcont = '', 0
7839
d4f5321b9d9e Differentiate between NEWLINE token (an official newline) and NL token
Guido van Rossum <guido@python.org>
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diff changeset
181 contline = None
5277
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Guido van Rossum <guido@python.org>
parents: 5266
diff changeset
182 elif needcont and line[-2:] != '\\\n' and line[-3:] != '\\\r\n':
18148
7bc473b2c654 Merging the gen-branch into the main line, at Guido's direction. Yay!
Tim Peters <tim.peters@gmail.com>
parents: 17178
diff changeset
183 yield (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
184 strstart, (lnum, len(line)), contline)
5172
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parents: 1407
diff changeset
185 contstr = ''
7839
d4f5321b9d9e Differentiate between NEWLINE token (an official newline) and NL token
Guido van Rossum <guido@python.org>
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diff changeset
186 contline = None
5277
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diff changeset
187 continue
5172
31b0e5f0badf Ka-Ping's version.
Guido van Rossum <guido@python.org>
parents: 1407
diff changeset
188 else:
31b0e5f0badf Ka-Ping's version.
Guido van Rossum <guido@python.org>
parents: 1407
diff changeset
189 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
190 contline = contline + line
5172
31b0e5f0badf Ka-Ping's version.
Guido van Rossum <guido@python.org>
parents: 1407
diff changeset
191 continue
31b0e5f0badf Ka-Ping's version.
Guido van Rossum <guido@python.org>
parents: 1407
diff changeset
192
5266
1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997:
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parents: 5178
diff changeset
193 elif parenlev == 0 and not continued: # new statement
5172
31b0e5f0badf Ka-Ping's version.
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parents: 1407
diff changeset
194 if not line: break
31b0e5f0badf Ka-Ping's version.
Guido van Rossum <guido@python.org>
parents: 1407
diff changeset
195 column = 0
5266
1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997:
Guido van Rossum <guido@python.org>
parents: 5178
diff changeset
196 while pos < max: # measure leading whitespace
5172
31b0e5f0badf Ka-Ping's version.
Guido van Rossum <guido@python.org>
parents: 1407
diff changeset
197 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
198 elif line[pos] == '\t': column = (column/tabsize + 1)*tabsize
5172
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parents: 1407
diff changeset
199 elif line[pos] == '\f': column = 0
31b0e5f0badf Ka-Ping's version.
Guido van Rossum <guido@python.org>
parents: 1407
diff changeset
200 else: break
31b0e5f0badf Ka-Ping's version.
Guido van Rossum <guido@python.org>
parents: 1407
diff changeset
201 pos = pos + 1
5277
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Guido van Rossum <guido@python.org>
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diff changeset
202 if pos == max: break
5266
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Guido van Rossum <guido@python.org>
parents: 5178
diff changeset
203
1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997:
Guido van Rossum <guido@python.org>
parents: 5178
diff changeset
204 if line[pos] in '#\r\n': # skip comments or blank lines
18148
7bc473b2c654 Merging the gen-branch into the main line, at Guido's direction. Yay!
Tim Peters <tim.peters@gmail.com>
parents: 17178
diff changeset
205 yield ((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
206 (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
207 continue
558
cfb53322c9d1 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
208
5172
31b0e5f0badf Ka-Ping's version.
Guido van Rossum <guido@python.org>
parents: 1407
diff changeset
209 if column > indents[-1]: # count indents or dedents
31b0e5f0badf Ka-Ping's version.
Guido van Rossum <guido@python.org>
parents: 1407
diff changeset
210 indents.append(column)
18148
7bc473b2c654 Merging the gen-branch into the main line, at Guido's direction. Yay!
Tim Peters <tim.peters@gmail.com>
parents: 17178
diff changeset
211 yield (INDENT, line[:pos], (lnum, 0), (lnum, pos), line)
5172
31b0e5f0badf Ka-Ping's version.
Guido van Rossum <guido@python.org>
parents: 1407
diff changeset
212 while column < indents[-1]:
31b0e5f0badf Ka-Ping's version.
Guido van Rossum <guido@python.org>
parents: 1407
diff changeset
213 indents = indents[:-1]
18148
7bc473b2c654 Merging the gen-branch into the main line, at Guido's direction. Yay!
Tim Peters <tim.peters@gmail.com>
parents: 17178
diff changeset
214 yield (DEDENT, '', (lnum, pos), (lnum, pos), line)
5172
31b0e5f0badf Ka-Ping's version.
Guido van Rossum <guido@python.org>
parents: 1407
diff changeset
215
31b0e5f0badf Ka-Ping's version.
Guido van Rossum <guido@python.org>
parents: 1407
diff changeset
216 else: # continued statement
5277
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Guido van Rossum <guido@python.org>
parents: 5266
diff changeset
217 if not line:
7df5a0d1f523 Ping's latest. Fixes triple quoted strings ending in odd
Guido van Rossum <guido@python.org>
parents: 5266
diff changeset
218 raise TokenError, ("EOF in multi-line statement", (lnum, 0))
5172
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Guido van Rossum <guido@python.org>
parents: 1407
diff changeset
219 continued = 0
31b0e5f0badf Ka-Ping's version.
Guido van Rossum <guido@python.org>
parents: 1407
diff changeset
220
31b0e5f0badf Ka-Ping's version.
Guido van Rossum <guido@python.org>
parents: 1407
diff changeset
221 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
222 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
223 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
224 start, end = pseudomatch.span(1)
5277
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Guido van Rossum <guido@python.org>
parents: 5266
diff changeset
225 spos, epos, pos = (lnum, start), (lnum, end), end
5266
1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997:
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parents: 5178
diff changeset
226 token, initial = line[start:end], line[start]
5172
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Guido van Rossum <guido@python.org>
parents: 1407
diff changeset
227
17178
707f95d05e69 Provide a StopTokenizing exception for conveniently exiting the loop.
Ka-Ping Yee <ping@zesty.ca>
parents: 16901
diff changeset
228 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
229 (initial == '.' and token != '.'): # ordinary number
18148
7bc473b2c654 Merging the gen-branch into the main line, at Guido's direction. Yay!
Tim Peters <tim.peters@gmail.com>
parents: 17178
diff changeset
230 yield (NUMBER, token, spos, epos, line)
5266
1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997:
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parents: 5178
diff changeset
231 elif initial in '\r\n':
18148
7bc473b2c654 Merging the gen-branch into the main line, at Guido's direction. Yay!
Tim Peters <tim.peters@gmail.com>
parents: 17178
diff changeset
232 yield (parenlev > 0 and NL or NEWLINE,
7839
d4f5321b9d9e Differentiate between NEWLINE token (an official newline) and NL token
Guido van Rossum <guido@python.org>
parents: 6532
diff changeset
233 token, spos, epos, line)
5266
1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997:
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parents: 5178
diff changeset
234 elif initial == '#':
18148
7bc473b2c654 Merging the gen-branch into the main line, at Guido's direction. Yay!
Tim Peters <tim.peters@gmail.com>
parents: 17178
diff changeset
235 yield (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
236 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
237 "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
238 "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
239 "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
240 "uR'''", 'uR"""', "UR'''", 'UR"""'):
5172
31b0e5f0badf Ka-Ping's version.
Guido van Rossum <guido@python.org>
parents: 1407
diff changeset
241 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
242 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
243 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
244 pos = endmatch.end(0)
5266
1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997:
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parents: 5178
diff changeset
245 token = line[start:pos]
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246 yield (STRING, token, spos, (lnum, pos), line)
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247 else:
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248 strstart = (lnum, start) # multiple lines
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249 contstr = line[start:]
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250 contline = line
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251 break
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d369629e8c27 New, fixed version with proper r"..." and R"..." support from Ka-Ping.
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252 elif initial in ("'", '"') or \
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253 token[:2] in ("r'", 'r"', "R'", 'R"',
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254 "u'", 'u"', "U'", 'U"') or \
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255 token[:3] in ("ur'", 'ur"', "Ur'", 'Ur"',
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256 "uR'", 'uR"', "UR'", 'UR"' ):
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257 if token[-1] == '\n': # continued string
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258 strstart = (lnum, start)
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259 endprog = (endprogs[initial] or endprogs[token[1]] or
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260 endprogs[token[2]])
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261 contstr, needcont = line[start:], 1
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262 contline = line
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263 break
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264 else: # ordinary string
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265 yield (STRING, token, spos, epos, line)
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266 elif initial in namechars: # ordinary name
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267 yield (NAME, token, spos, epos, line)
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268 elif initial == '\\': # continued stmt
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269 continued = 1
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270 else:
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271 if initial in '([{': parenlev = parenlev + 1
1efc4273fdb7 Ka-Ping's muich improved version of March 26, 1997:
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272 elif initial in ')]}': parenlev = parenlev - 1
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273 yield (OP, token, spos, epos, line)
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274 else:
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275 yield (ERRORTOKEN, line[pos],
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276 (lnum, pos), (lnum, pos+1), line)
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277 pos = pos + 1
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278
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279 for indent in indents[1:]: # pop remaining indent levels
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280 yield (DEDENT, '', (lnum, 0), (lnum, 0), '')
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281 yield (ENDMARKER, '', (lnum, 0), (lnum, 0), '')
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282
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283 if __name__ == '__main__': # testing
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284 import sys
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285 if len(sys.argv) > 1: tokenize(open(sys.argv[1]).readline)
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286 else: tokenize(sys.stdin.readline)