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This provides a high-level interface to parse a file into a syntax tree.
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s4 Parse a series of tokens and return the syntax tree.i i u s
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| � | S( s� 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 ( ( s, /usr/lib64/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 � x$ | D] } t | d t d t �q? 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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