/Lib/lib2to3/fixes/fix_itertools.py
http://unladen-swallow.googlecode.com/ · Python · 41 lines · 23 code · 5 blank · 13 comment · 3 complexity · d2b48acbc9d415b64f3c71575fbfb9df MD5 · raw file
- """ Fixer for itertools.(imap|ifilter|izip) --> (map|filter|zip) and
- itertools.ifilterfalse --> itertools.filterfalse (bugs 2360-2363)
- imports from itertools are fixed in fix_itertools_import.py
- If itertools is imported as something else (ie: import itertools as it;
- it.izip(spam, eggs)) method calls will not get fixed.
- """
- # Local imports
- from .. import fixer_base
- from ..fixer_util import Name
- class FixItertools(fixer_base.BaseFix):
- it_funcs = "('imap'|'ifilter'|'izip'|'ifilterfalse')"
- PATTERN = """
- power< it='itertools'
- trailer<
- dot='.' func=%(it_funcs)s > trailer< '(' [any] ')' > >
- |
- power< func=%(it_funcs)s trailer< '(' [any] ')' > >
- """ %(locals())
- # Needs to be run after fix_(map|zip|filter)
- run_order = 6
- def transform(self, node, results):
- prefix = None
- func = results['func'][0]
- if 'it' in results and func.value != 'ifilterfalse':
- dot, it = (results['dot'], results['it'])
- # Remove the 'itertools'
- prefix = it.get_prefix()
- it.remove()
- # Replace the node wich contains ('.', 'function') with the
- # function (to be consistant with the second part of the pattern)
- dot.remove()
- func.parent.replace(func)
- prefix = prefix or func.get_prefix()
- func.replace(Name(func.value[1:], prefix=prefix))