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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 basefix
from .util import Name
class FixItertools(basefix.BaseFix):
it_funcs = "('imap'|'ifilter'|'izip'|'ifilterfalse')"
PATTERN = """
power< it='itertools'
trailer<
dot='.' func=%(it_funcs)s > trailer< '(' [any] ')' > >
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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))
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