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This provides a high-level interface to parse a file into a syntax tree.
s# Guido van Rossum <guido@python.org>t Drivert load_grammariÿÿÿÿNi ( t grammart parset tokent tokenizet pgenc B sV e Z d d d „ Z e d „ Z e d „ Z e d „ Z d e d „ Z e d „ Z RS( c C s: | | _ | d k r$ t j ƒ } n | | _ | | _ d S( N( R t Nonet loggingt getLoggert loggert convert( t selfR R R
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s4 Parse a series of tokens and return the syntax tree.i i u s
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c C s" t j | j ƒ } | j | | ƒ S( s* Parse a stream and return the syntax tree.( R t generate_tokenst readlineR) ( R t streamR R ( ( s0 /usr/local/lib/python2.7/lib2to3/pgen2/driver.pyt parse_stream_rawW s c C s | j | | ƒ S( s* Parse a stream and return the syntax tree.( R- ( R R, R ( ( s0 /usr/local/lib/python2.7/lib2to3/pgen2/driver.pyt parse_stream\ s c C s; t j | d | ƒ } z | j | | ƒ SWd | j ƒ Xd S( s( Parse a file and return the syntax tree.t rN( t codecst openR. t close( R t filenamet encodingR R, ( ( s0 /usr/local/lib/python2.7/lib2to3/pgen2/driver.pyt
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j ƒ } | j | ƒ | S( s' Load the grammar (maybe from a pickle).s! Generating grammar tables from %ss Writing grammar tables to %ss Writing failed: %sN(
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| ƒ | S( sÙ Normally, loads a pickled grammar by doing
pkgutil.get_data(package, pickled_grammar)
where *pickled_grammar* is computed from *grammar_source* by adding the
Python version and using a ``.pickle`` extension.
However, if *grammar_source* is an extant file, load_grammar(grammar_source)
is called instead. This facilitates using a packaged grammar file when needed
but preserves load_grammar's automatic regeneration behavior when possible.
( R= R> t isfileR RH t basenamet pkgutilt get_dataR RN t loads( t packaget grammar_sourcet pickled_namet dataRS ( ( s0 /usr/local/lib/python2.7/lib2to3/pgen2/driver.pyt load_packaged_grammar“ s
c G sc | s t j d } n t j d t j d t j d d ƒ x$ | D] } t | d t d t ƒq? Wt S( s Main program, when run as a script: produce grammar pickle files.
Calls load_grammar for each argument, a path to a grammar text file.
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