898 lines
28 KiB
Python
898 lines
28 KiB
Python
"""
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FIXME:https://github.com/twisted/twisted/issues/3843
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This can be removed once t.persisted.aot is removed.
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New code should not make use of this.
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Tokenization help for Python programs.
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vendored from https://github.com/python/cpython/blob/6b825c1b8a14460641ca6f1647d83005c68199aa/Lib/tokenize.py
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Licence: https://docs.python.org/3/license.html
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tokenize(readline) is a generator that breaks a stream of bytes into
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Python tokens. It decodes the bytes according to PEP-0263 for
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determining source file encoding.
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It accepts a readline-like method which is called repeatedly to get the
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next line of input (or b"" for EOF). It generates 5-tuples with these
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members:
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the token type (see token.py)
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the token (a string)
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the starting (row, column) indices of the token (a 2-tuple of ints)
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the ending (row, column) indices of the token (a 2-tuple of ints)
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the original line (string)
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It is designed to match the working of the Python tokenizer exactly, except
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that it produces COMMENT tokens for comments and gives type OP for all
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operators. Additionally, all token lists start with an ENCODING token
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which tells you which encoding was used to decode the bytes stream.
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"""
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__author__ = "Ka-Ping Yee <ping@lfw.org>"
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__credits__ = (
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"GvR, ESR, Tim Peters, Thomas Wouters, Fred Drake, "
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"Skip Montanaro, Raymond Hettinger, Trent Nelson, "
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"Michael Foord"
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)
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import collections
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import functools
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import itertools as _itertools
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import re
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import sys
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from builtins import open as _builtin_open
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from codecs import BOM_UTF8, lookup
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from io import TextIOWrapper
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from ._token import (
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AMPER,
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AMPEREQUAL,
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ASYNC,
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AT,
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ATEQUAL,
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AWAIT,
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CIRCUMFLEX,
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CIRCUMFLEXEQUAL,
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COLON,
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COLONEQUAL,
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COMMA,
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COMMENT,
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DEDENT,
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DOT,
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DOUBLESLASH,
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DOUBLESLASHEQUAL,
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DOUBLESTAR,
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DOUBLESTAREQUAL,
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ELLIPSIS,
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ENCODING,
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ENDMARKER,
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EQEQUAL,
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EQUAL,
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ERRORTOKEN,
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EXACT_TOKEN_TYPES,
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GREATER,
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GREATEREQUAL,
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INDENT,
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ISEOF,
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ISNONTERMINAL,
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ISTERMINAL,
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LBRACE,
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LEFTSHIFT,
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LEFTSHIFTEQUAL,
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LESS,
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LESSEQUAL,
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LPAR,
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LSQB,
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MINEQUAL,
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MINUS,
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N_TOKENS,
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NAME,
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NEWLINE,
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NL,
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NOTEQUAL,
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NT_OFFSET,
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NUMBER,
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OP,
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PERCENT,
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PERCENTEQUAL,
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PLUS,
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PLUSEQUAL,
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RARROW,
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RBRACE,
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RIGHTSHIFT,
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RIGHTSHIFTEQUAL,
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RPAR,
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RSQB,
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SEMI,
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SLASH,
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SLASHEQUAL,
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SOFT_KEYWORD,
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STAR,
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STAREQUAL,
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STRING,
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TILDE,
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TYPE_COMMENT,
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TYPE_IGNORE,
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VBAR,
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VBAREQUAL,
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tok_name,
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)
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__all__ = [
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"tok_name",
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"ISTERMINAL",
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"ISNONTERMINAL",
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"ISEOF",
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"ENDMARKER",
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"NAME",
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"NUMBER",
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"STRING",
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"NEWLINE",
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"INDENT",
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"DEDENT",
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"LPAR",
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"RPAR",
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"LSQB",
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"RSQB",
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"COLON",
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"COMMA",
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"SEMI",
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"PLUS",
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"MINUS",
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"STAR",
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"SLASH",
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"VBAR",
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"AMPER",
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"LESS",
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"GREATER",
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"EQUAL",
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"DOT",
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"PERCENT",
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"LBRACE",
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"RBRACE",
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"EQEQUAL",
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"NOTEQUAL",
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"LESSEQUAL",
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"GREATEREQUAL",
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"TILDE",
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"CIRCUMFLEX",
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"LEFTSHIFT",
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"RIGHTSHIFT",
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"DOUBLESTAR",
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"PLUSEQUAL",
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"MINEQUAL",
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"STAREQUAL",
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"SLASHEQUAL",
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"PERCENTEQUAL",
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"AMPEREQUAL",
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"VBAREQUAL",
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"CIRCUMFLEXEQUAL",
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"LEFTSHIFTEQUAL",
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"RIGHTSHIFTEQUAL",
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"DOUBLESTAREQUAL",
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"DOUBLESLASH",
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"DOUBLESLASHEQUAL",
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"AT",
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"ATEQUAL",
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"RARROW",
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"ELLIPSIS",
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"COLONEQUAL",
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"OP",
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"AWAIT",
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"ASYNC",
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"TYPE_IGNORE",
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"TYPE_COMMENT",
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"SOFT_KEYWORD",
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"ERRORTOKEN",
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"COMMENT",
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"NL",
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"ENCODING",
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"N_TOKENS",
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"NT_OFFSET",
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"tokenize",
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"generate_tokens",
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"detect_encoding",
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"untokenize",
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"TokenInfo",
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]
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cookie_re = re.compile(r"^[ \t\f]*#.*?coding[:=][ \t]*([-\w.]+)", re.ASCII)
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blank_re = re.compile(rb"^[ \t\f]*(?:[#\r\n]|$)", re.ASCII)
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class TokenInfo(collections.namedtuple("TokenInfo", "type string start end line")):
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def __repr__(self):
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annotated_type = "%d (%s)" % (self.type, tok_name[self.type])
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return (
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"TokenInfo(type=%s, string=%r, start=%r, end=%r, line=%r)"
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% self._replace(type=annotated_type)
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)
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@property
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def exact_type(self):
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if self.type == OP and self.string in EXACT_TOKEN_TYPES:
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return EXACT_TOKEN_TYPES[self.string]
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else:
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return self.type
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def group(*choices):
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return "(" + "|".join(choices) + ")"
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def any(*choices):
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return group(*choices) + "*"
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def maybe(*choices):
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return group(*choices) + "?"
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# Note: we use unicode matching for names ("\w") but ascii matching for
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# number literals.
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Whitespace = r"[ \f\t]*"
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Comment = r"#[^\r\n]*"
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Ignore = Whitespace + any(r"\\\r?\n" + Whitespace) + maybe(Comment)
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Name = r"\w+"
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Hexnumber = r"0[xX](?:_?[0-9a-fA-F])+"
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Binnumber = r"0[bB](?:_?[01])+"
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Octnumber = r"0[oO](?:_?[0-7])+"
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Decnumber = r"(?:0(?:_?0)*|[1-9](?:_?[0-9])*)"
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Intnumber = group(Hexnumber, Binnumber, Octnumber, Decnumber)
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Exponent = r"[eE][-+]?[0-9](?:_?[0-9])*"
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Pointfloat = group(
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r"[0-9](?:_?[0-9])*\.(?:[0-9](?:_?[0-9])*)?", r"\.[0-9](?:_?[0-9])*"
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) + maybe(Exponent)
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Expfloat = r"[0-9](?:_?[0-9])*" + Exponent
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Floatnumber = group(Pointfloat, Expfloat)
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Imagnumber = group(r"[0-9](?:_?[0-9])*[jJ]", Floatnumber + r"[jJ]")
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Number = group(Imagnumber, Floatnumber, Intnumber)
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# Return the empty string, plus all of the valid string prefixes.
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def _all_string_prefixes():
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# The valid string prefixes. Only contain the lower case versions,
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# and don't contain any permutations (include 'fr', but not
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# 'rf'). The various permutations will be generated.
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_valid_string_prefixes = ["b", "r", "u", "f", "br", "fr"]
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# if we add binary f-strings, add: ['fb', 'fbr']
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result = {""}
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for prefix in _valid_string_prefixes:
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for t in _itertools.permutations(prefix):
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# create a list with upper and lower versions of each
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# character
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for u in _itertools.product(*[(c, c.upper()) for c in t]):
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result.add("".join(u))
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return result
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@functools.lru_cache(None)
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def _compile(expr):
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return re.compile(expr, re.UNICODE)
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# Note that since _all_string_prefixes includes the empty string,
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# StringPrefix can be the empty string (making it optional).
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StringPrefix = group(*_all_string_prefixes())
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# Tail end of ' string.
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Single = r"[^'\\]*(?:\\.[^'\\]*)*'"
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# Tail end of " string.
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Double = r'[^"\\]*(?:\\.[^"\\]*)*"'
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# Tail end of ''' string.
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Single3 = r"[^'\\]*(?:(?:\\.|'(?!''))[^'\\]*)*'''"
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# Tail end of """ string.
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Double3 = r'[^"\\]*(?:(?:\\.|"(?!""))[^"\\]*)*"""'
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Triple = group(StringPrefix + "'''", StringPrefix + '"""')
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# Single-line ' or " string.
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String = group(
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StringPrefix + r"'[^\n'\\]*(?:\\.[^\n'\\]*)*'",
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StringPrefix + r'"[^\n"\\]*(?:\\.[^\n"\\]*)*"',
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)
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# Sorting in reverse order puts the long operators before their prefixes.
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# Otherwise if = came before ==, == would get recognized as two instances
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# of =.
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Special = group(*(re.escape(x) for x in sorted(EXACT_TOKEN_TYPES, reverse=True)))
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Funny = group(r"\r?\n", Special)
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PlainToken = group(Number, Funny, String, Name)
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Token = Ignore + PlainToken
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# First (or only) line of ' or " string.
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ContStr = group(
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StringPrefix + r"'[^\n'\\]*(?:\\.[^\n'\\]*)*" + group("'", r"\\\r?\n"),
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StringPrefix + r'"[^\n"\\]*(?:\\.[^\n"\\]*)*' + group('"', r"\\\r?\n"),
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)
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PseudoExtras = group(r"\\\r?\n|\Z", Comment, Triple)
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PseudoToken = Whitespace + group(PseudoExtras, Number, Funny, ContStr, Name)
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# For a given string prefix plus quotes, endpats maps it to a regex
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# to match the remainder of that string. _prefix can be empty, for
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# a normal single or triple quoted string (with no prefix).
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endpats = {}
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for _prefix in _all_string_prefixes():
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endpats[_prefix + "'"] = Single
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endpats[_prefix + '"'] = Double
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endpats[_prefix + "'''"] = Single3
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endpats[_prefix + '"""'] = Double3
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del _prefix
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# A set of all of the single and triple quoted string prefixes,
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# including the opening quotes.
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single_quoted = set()
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triple_quoted = set()
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for t in _all_string_prefixes():
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for u in (t + '"', t + "'"):
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single_quoted.add(u)
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for u in (t + '"""', t + "'''"):
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triple_quoted.add(u)
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del t, u
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tabsize = 8
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class TokenError(Exception):
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pass
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class StopTokenizing(Exception):
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pass
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class Untokenizer:
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def __init__(self):
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self.tokens = []
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self.prev_row = 1
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self.prev_col = 0
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self.encoding = None
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def add_whitespace(self, start):
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row, col = start
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if row < self.prev_row or row == self.prev_row and col < self.prev_col:
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raise ValueError(
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"start ({},{}) precedes previous end ({},{})".format(
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row, col, self.prev_row, self.prev_col
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)
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)
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row_offset = row - self.prev_row
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if row_offset:
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self.tokens.append("\\\n" * row_offset)
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self.prev_col = 0
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col_offset = col - self.prev_col
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if col_offset:
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self.tokens.append(" " * col_offset)
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def untokenize(self, iterable):
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it = iter(iterable)
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indents = []
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startline = False
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for t in it:
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if len(t) == 2:
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self.compat(t, it)
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break
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tok_type, token, start, end, line = t
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if tok_type == ENCODING:
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self.encoding = token
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continue
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if tok_type == ENDMARKER:
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break
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if tok_type == INDENT:
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indents.append(token)
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continue
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elif tok_type == DEDENT:
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indents.pop()
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self.prev_row, self.prev_col = end
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continue
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elif tok_type in (NEWLINE, NL):
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startline = True
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elif startline and indents:
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indent = indents[-1]
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if start[1] >= len(indent):
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self.tokens.append(indent)
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self.prev_col = len(indent)
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startline = False
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self.add_whitespace(start)
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self.tokens.append(token)
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self.prev_row, self.prev_col = end
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if tok_type in (NEWLINE, NL):
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self.prev_row += 1
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self.prev_col = 0
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return "".join(self.tokens)
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def compat(self, token, iterable):
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indents = []
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toks_append = self.tokens.append
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startline = token[0] in (NEWLINE, NL)
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prevstring = False
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for tok in _itertools.chain([token], iterable):
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toknum, tokval = tok[:2]
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if toknum == ENCODING:
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self.encoding = tokval
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continue
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if toknum in (NAME, NUMBER):
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tokval += " "
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# Insert a space between two consecutive strings
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if toknum == STRING:
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if prevstring:
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tokval = " " + tokval
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prevstring = True
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else:
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prevstring = False
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if toknum == INDENT:
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indents.append(tokval)
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continue
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elif toknum == DEDENT:
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indents.pop()
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continue
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elif toknum in (NEWLINE, NL):
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startline = True
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elif startline and indents:
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toks_append(indents[-1])
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startline = False
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toks_append(tokval)
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def untokenize(iterable):
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"""Transform tokens back into Python source code.
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It returns a bytes object, encoded using the ENCODING
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token, which is the first token sequence output by tokenize.
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Each element returned by the iterable must be a token sequence
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with at least two elements, a token number and token value. If
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only two tokens are passed, the resulting output is poor.
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Round-trip invariant for full input:
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Untokenized source will match input source exactly
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Round-trip invariant for limited input:
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# Output bytes will tokenize back to the input
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t1 = [tok[:2] for tok in tokenize(f.readline)]
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newcode = untokenize(t1)
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readline = BytesIO(newcode).readline
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t2 = [tok[:2] for tok in tokenize(readline)]
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assert t1 == t2
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"""
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ut = Untokenizer()
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out = ut.untokenize(iterable)
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if ut.encoding is not None:
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out = out.encode(ut.encoding)
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return out
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def _get_normal_name(orig_enc):
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"""Imitates get_normal_name in tokenizer.c."""
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# Only care about the first 12 characters.
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enc = orig_enc[:12].lower().replace("_", "-")
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if enc == "utf-8" or enc.startswith("utf-8-"):
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return "utf-8"
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if enc in ("latin-1", "iso-8859-1", "iso-latin-1") or enc.startswith(
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("latin-1-", "iso-8859-1-", "iso-latin-1-")
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):
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return "iso-8859-1"
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return orig_enc
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def detect_encoding(readline):
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"""
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The detect_encoding() function is used to detect the encoding that should
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be used to decode a Python source file. It requires one argument, readline,
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in the same way as the tokenize() generator.
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It will call readline a maximum of twice, and return the encoding used
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(as a string) and a list of any lines (left as bytes) it has read in.
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It detects the encoding from the presence of a utf-8 bom or an encoding
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cookie as specified in pep-0263. If both a bom and a cookie are present,
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but disagree, a SyntaxError will be raised. If the encoding cookie is an
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invalid charset, raise a SyntaxError. Note that if a utf-8 bom is found,
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'utf-8-sig' is returned.
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If no encoding is specified, then the default of 'utf-8' will be returned.
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"""
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try:
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filename = readline.__self__.name
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except AttributeError:
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filename = None
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bom_found = False
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encoding = None
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default = "utf-8"
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def read_or_stop():
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try:
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return readline()
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except StopIteration:
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return b""
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def find_cookie(line):
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try:
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# Decode as UTF-8. Either the line is an encoding declaration,
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# in which case it should be pure ASCII, or it must be UTF-8
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# per default encoding.
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line_string = line.decode("utf-8")
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except UnicodeDecodeError:
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msg = "invalid or missing encoding declaration"
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if filename is not None:
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msg = "{} for {!r}".format(msg, filename)
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raise SyntaxError(msg)
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match = cookie_re.match(line_string)
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if not match:
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return None
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encoding = _get_normal_name(match.group(1))
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try:
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lookup(encoding)
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except LookupError:
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# This behaviour mimics the Python interpreter
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if filename is None:
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msg = "unknown encoding: " + encoding
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else:
|
|
msg = "unknown encoding for {!r}: {}".format(filename, encoding)
|
|
raise SyntaxError(msg)
|
|
|
|
if bom_found:
|
|
if encoding != "utf-8":
|
|
# This behaviour mimics the Python interpreter
|
|
if filename is None:
|
|
msg = "encoding problem: utf-8"
|
|
else:
|
|
msg = "encoding problem for {!r}: utf-8".format(filename)
|
|
raise SyntaxError(msg)
|
|
encoding += "-sig"
|
|
return encoding
|
|
|
|
first = read_or_stop()
|
|
if first.startswith(BOM_UTF8):
|
|
bom_found = True
|
|
first = first[3:]
|
|
default = "utf-8-sig"
|
|
if not first:
|
|
return default, []
|
|
|
|
encoding = find_cookie(first)
|
|
if encoding:
|
|
return encoding, [first]
|
|
if not blank_re.match(first):
|
|
return default, [first]
|
|
|
|
second = read_or_stop()
|
|
if not second:
|
|
return default, [first]
|
|
|
|
encoding = find_cookie(second)
|
|
if encoding:
|
|
return encoding, [first, second]
|
|
|
|
return default, [first, second]
|
|
|
|
|
|
def open(filename):
|
|
"""Open a file in read only mode using the encoding detected by
|
|
detect_encoding().
|
|
"""
|
|
buffer = _builtin_open(filename, "rb")
|
|
try:
|
|
encoding, lines = detect_encoding(buffer.readline)
|
|
buffer.seek(0)
|
|
text = TextIOWrapper(buffer, encoding, line_buffering=True)
|
|
text.mode = "r"
|
|
return text
|
|
except BaseException:
|
|
buffer.close()
|
|
raise
|
|
|
|
|
|
def tokenize(readline):
|
|
"""
|
|
The tokenize() generator requires one argument, readline, which
|
|
must be a callable object which provides the same interface as the
|
|
readline() method of built-in file objects. Each call to the function
|
|
should return one line of input as bytes. Alternatively, readline
|
|
can be a callable function terminating with StopIteration:
|
|
readline = open(myfile, 'rb').__next__ # Example of alternate readline
|
|
|
|
The generator produces 5-tuples with these members: the token type; the
|
|
token string; a 2-tuple (srow, scol) of ints specifying the row and
|
|
column where the token begins in the source; a 2-tuple (erow, ecol) of
|
|
ints specifying the row and column where the token ends in the source;
|
|
and the line on which the token was found. The line passed is the
|
|
physical line.
|
|
|
|
The first token sequence will always be an ENCODING token
|
|
which tells you which encoding was used to decode the bytes stream.
|
|
"""
|
|
encoding, consumed = detect_encoding(readline)
|
|
empty = _itertools.repeat(b"")
|
|
rl_gen = _itertools.chain(consumed, iter(readline, b""), empty)
|
|
return _tokenize(rl_gen.__next__, encoding)
|
|
|
|
|
|
def _tokenize(readline, encoding):
|
|
strstart = None
|
|
endprog = None
|
|
lnum = parenlev = continued = 0
|
|
numchars = "0123456789"
|
|
contstr, needcont = "", 0
|
|
contline = None
|
|
indents = [0]
|
|
|
|
if encoding is not None:
|
|
if encoding == "utf-8-sig":
|
|
# BOM will already have been stripped.
|
|
encoding = "utf-8"
|
|
yield TokenInfo(ENCODING, encoding, (0, 0), (0, 0), "")
|
|
last_line = b""
|
|
line = b""
|
|
while True: # loop over lines in stream
|
|
try:
|
|
# We capture the value of the line variable here because
|
|
# readline uses the empty string '' to signal end of input,
|
|
# hence `line` itself will always be overwritten at the end
|
|
# of this loop.
|
|
last_line = line
|
|
line = readline()
|
|
except StopIteration:
|
|
line = b""
|
|
|
|
if encoding is not None:
|
|
line = line.decode(encoding)
|
|
lnum += 1
|
|
pos, max = 0, len(line)
|
|
|
|
if contstr: # continued string
|
|
if not line:
|
|
raise TokenError("EOF in multi-line string", strstart)
|
|
endmatch = endprog.match(line)
|
|
if endmatch:
|
|
pos = end = endmatch.end(0)
|
|
yield TokenInfo(
|
|
STRING, contstr + line[:end], strstart, (lnum, end), contline + line
|
|
)
|
|
contstr, needcont = "", 0
|
|
contline = None
|
|
elif needcont and line[-2:] != "\\\n" and line[-3:] != "\\\r\n":
|
|
yield TokenInfo(
|
|
ERRORTOKEN, contstr + line, strstart, (lnum, len(line)), contline
|
|
)
|
|
contstr = ""
|
|
contline = None
|
|
continue
|
|
else:
|
|
contstr = contstr + line
|
|
contline = contline + line
|
|
continue
|
|
|
|
elif parenlev == 0 and not continued: # new statement
|
|
if not line:
|
|
break
|
|
column = 0
|
|
while pos < max: # measure leading whitespace
|
|
if line[pos] == " ":
|
|
column += 1
|
|
elif line[pos] == "\t":
|
|
column = (column // tabsize + 1) * tabsize
|
|
elif line[pos] == "\f":
|
|
column = 0
|
|
else:
|
|
break
|
|
pos += 1
|
|
if pos == max:
|
|
break
|
|
|
|
if line[pos] in "#\r\n": # skip comments or blank lines
|
|
if line[pos] == "#":
|
|
comment_token = line[pos:].rstrip("\r\n")
|
|
yield TokenInfo(
|
|
COMMENT,
|
|
comment_token,
|
|
(lnum, pos),
|
|
(lnum, pos + len(comment_token)),
|
|
line,
|
|
)
|
|
pos += len(comment_token)
|
|
|
|
yield TokenInfo(NL, line[pos:], (lnum, pos), (lnum, len(line)), line)
|
|
continue
|
|
|
|
if column > indents[-1]: # count indents or dedents
|
|
indents.append(column)
|
|
yield TokenInfo(INDENT, line[:pos], (lnum, 0), (lnum, pos), line)
|
|
while column < indents[-1]:
|
|
if column not in indents:
|
|
raise IndentationError(
|
|
"unindent does not match any outer indentation level",
|
|
("<tokenize>", lnum, pos, line),
|
|
)
|
|
indents = indents[:-1]
|
|
|
|
yield TokenInfo(DEDENT, "", (lnum, pos), (lnum, pos), line)
|
|
|
|
else: # continued statement
|
|
if not line:
|
|
raise TokenError("EOF in multi-line statement", (lnum, 0))
|
|
continued = 0
|
|
|
|
while pos < max:
|
|
pseudomatch = _compile(PseudoToken).match(line, pos)
|
|
if pseudomatch: # scan for tokens
|
|
start, end = pseudomatch.span(1)
|
|
spos, epos, pos = (lnum, start), (lnum, end), end
|
|
if start == end:
|
|
continue
|
|
token, initial = line[start:end], line[start]
|
|
|
|
if initial in numchars or ( # ordinary number
|
|
initial == "." and token != "." and token != "..."
|
|
):
|
|
yield TokenInfo(NUMBER, token, spos, epos, line)
|
|
elif initial in "\r\n":
|
|
if parenlev > 0:
|
|
yield TokenInfo(NL, token, spos, epos, line)
|
|
else:
|
|
yield TokenInfo(NEWLINE, token, spos, epos, line)
|
|
|
|
elif initial == "#":
|
|
assert not token.endswith("\n")
|
|
yield TokenInfo(COMMENT, token, spos, epos, line)
|
|
|
|
elif token in triple_quoted:
|
|
endprog = _compile(endpats[token])
|
|
endmatch = endprog.match(line, pos)
|
|
if endmatch: # all on one line
|
|
pos = endmatch.end(0)
|
|
token = line[start:pos]
|
|
yield TokenInfo(STRING, token, spos, (lnum, pos), line)
|
|
else:
|
|
strstart = (lnum, start) # multiple lines
|
|
contstr = line[start:]
|
|
contline = line
|
|
break
|
|
|
|
# Check up to the first 3 chars of the token to see if
|
|
# they're in the single_quoted set. If so, they start
|
|
# a string.
|
|
# We're using the first 3, because we're looking for
|
|
# "rb'" (for example) at the start of the token. If
|
|
# we switch to longer prefixes, this needs to be
|
|
# adjusted.
|
|
# Note that initial == token[:1].
|
|
# Also note that single quote checking must come after
|
|
# triple quote checking (above).
|
|
elif (
|
|
initial in single_quoted
|
|
or token[:2] in single_quoted
|
|
or token[:3] in single_quoted
|
|
):
|
|
if token[-1] == "\n": # continued string
|
|
strstart = (lnum, start)
|
|
# Again, using the first 3 chars of the
|
|
# token. This is looking for the matching end
|
|
# regex for the correct type of quote
|
|
# character. So it's really looking for
|
|
# endpats["'"] or endpats['"'], by trying to
|
|
# skip string prefix characters, if any.
|
|
endprog = _compile(
|
|
endpats.get(initial)
|
|
or endpats.get(token[1])
|
|
or endpats.get(token[2])
|
|
)
|
|
contstr, needcont = line[start:], 1
|
|
contline = line
|
|
break
|
|
else: # ordinary string
|
|
yield TokenInfo(STRING, token, spos, epos, line)
|
|
|
|
elif initial.isidentifier(): # ordinary name
|
|
yield TokenInfo(NAME, token, spos, epos, line)
|
|
elif initial == "\\": # continued stmt
|
|
continued = 1
|
|
else:
|
|
if initial in "([{":
|
|
parenlev += 1
|
|
elif initial in ")]}":
|
|
parenlev -= 1
|
|
yield TokenInfo(OP, token, spos, epos, line)
|
|
else:
|
|
yield TokenInfo(
|
|
ERRORTOKEN, line[pos], (lnum, pos), (lnum, pos + 1), line
|
|
)
|
|
pos += 1
|
|
|
|
# Add an implicit NEWLINE if the input doesn't end in one
|
|
if (
|
|
last_line
|
|
and last_line[-1] not in "\r\n"
|
|
and not last_line.strip().startswith("#")
|
|
):
|
|
yield TokenInfo(
|
|
NEWLINE, "", (lnum - 1, len(last_line)), (lnum - 1, len(last_line) + 1), ""
|
|
)
|
|
for indent in indents[1:]: # pop remaining indent levels
|
|
yield TokenInfo(DEDENT, "", (lnum, 0), (lnum, 0), "")
|
|
yield TokenInfo(ENDMARKER, "", (lnum, 0), (lnum, 0), "")
|
|
|
|
|
|
def generate_tokens(readline):
|
|
"""Tokenize a source reading Python code as unicode strings.
|
|
|
|
This has the same API as tokenize(), except that it expects the *readline*
|
|
callable to return str objects instead of bytes.
|
|
"""
|
|
return _tokenize(readline, None)
|
|
|
|
|
|
def main():
|
|
import argparse
|
|
|
|
# Helper error handling routines
|
|
def perror(message):
|
|
sys.stderr.write(message)
|
|
sys.stderr.write("\n")
|
|
|
|
def error(message, filename=None, location=None):
|
|
if location:
|
|
args = (filename,) + location + (message,)
|
|
perror("%s:%d:%d: error: %s" % args)
|
|
elif filename:
|
|
perror("%s: error: %s" % (filename, message))
|
|
else:
|
|
perror("error: %s" % message)
|
|
sys.exit(1)
|
|
|
|
# Parse the arguments and options
|
|
parser = argparse.ArgumentParser(prog="python -m tokenize")
|
|
parser.add_argument(
|
|
dest="filename",
|
|
nargs="?",
|
|
metavar="filename.py",
|
|
help="the file to tokenize; defaults to stdin",
|
|
)
|
|
parser.add_argument(
|
|
"-e",
|
|
"--exact",
|
|
dest="exact",
|
|
action="store_true",
|
|
help="display token names using the exact type",
|
|
)
|
|
args = parser.parse_args()
|
|
|
|
try:
|
|
# Tokenize the input
|
|
if args.filename:
|
|
filename = args.filename
|
|
with _builtin_open(filename, "rb") as f:
|
|
tokens = list(tokenize(f.readline))
|
|
else:
|
|
filename = "<stdin>"
|
|
tokens = _tokenize(sys.stdin.readline, None)
|
|
|
|
# Output the tokenization
|
|
for token in tokens:
|
|
token_type = token.type
|
|
if args.exact:
|
|
token_type = token.exact_type
|
|
token_range = "%d,%d-%d,%d:" % (token.start + token.end)
|
|
print("%-20s%-15s%-15r" % (token_range, tok_name[token_type], token.string))
|
|
except IndentationError as err:
|
|
line, column = err.args[1][1:3]
|
|
error(err.args[0], filename, (line, column))
|
|
except TokenError as err:
|
|
line, column = err.args[1]
|
|
error(err.args[0], filename, (line, column))
|
|
except SyntaxError as err:
|
|
error(err, filename)
|
|
except OSError as err:
|
|
error(err)
|
|
except KeyboardInterrupt:
|
|
print("interrupted\n")
|
|
except Exception as err:
|
|
perror("unexpected error: %s" % err)
|
|
raise
|
|
|
|
|
|
if __name__ == "__main__":
|
|
main()
|