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Direktori : /proc/thread-self/root/proc/self/root/lib64/python2.7/lib2to3/ |
Current File : //proc/thread-self/root/proc/self/root/lib64/python2.7/lib2to3/pygram.py |
# Copyright 2006 Google, Inc. All Rights Reserved. # Licensed to PSF under a Contributor Agreement. """Export the Python grammar and symbols.""" # Python imports import os # Local imports from .pgen2 import token from .pgen2 import driver from . import pytree # The grammar file _GRAMMAR_FILE = os.path.join(os.path.dirname(__file__), "Grammar.txt") _PATTERN_GRAMMAR_FILE = os.path.join(os.path.dirname(__file__), "PatternGrammar.txt") class Symbols(object): def __init__(self, grammar): """Initializer. Creates an attribute for each grammar symbol (nonterminal), whose value is the symbol's type (an int >= 256). """ for name, symbol in grammar.symbol2number.iteritems(): setattr(self, name, symbol) python_grammar = driver.load_grammar(_GRAMMAR_FILE) python_symbols = Symbols(python_grammar) python_grammar_no_print_statement = python_grammar.copy() del python_grammar_no_print_statement.keywords["print"] pattern_grammar = driver.load_grammar(_PATTERN_GRAMMAR_FILE) pattern_symbols = Symbols(pattern_grammar)