# Copyright 2008 Armin Ronacher.
# Licensed to PSF under a Contributor Agreement.
"""Fixer for reduce().
Makes sure reduce() is imported from the functools module if reduce is
used in that module.
"""
from lib2to3 import fixer_base
from lib2to3.fixer_util import touch_import
class FixReduce(fixer_base.BaseFix):
PATTERN = """
power< 'reduce'
trailer< '('
arglist< (
(not(argument<any '=' any>) any ','
not(argument<any '=' any>) any) |
(not(argument<any '=' any>) any ','
not(argument<any '=' any>) any ','
not(argument<any '=' any>) any)
) >
')' >
>
"""
def transform(self, node, results):
touch_import(u'functools', u'reduce', node)
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