""" 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))