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- """ 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):
- BM_compatible = True
- it_funcs = "('imap'|'ifilter'|'izip'|'izip_longest'|'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 not in ('ifilterfalse', 'izip_longest')):
- dot, it = (results['dot'], results['it'])
- # Remove the 'itertools'
- prefix = it.prefix
- it.remove()
- # Replace the node which contains ('.', 'function') with the
- # function (to be consistent with the second part of the pattern)
- dot.remove()
- func.parent.replace(func)
- prefix = prefix or func.prefix
- func.replace(Name(func.value[1:], prefix=prefix))
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