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Tip revision: 5757429130b8bba026e75d358ef0494a6ac0aed8 authored by Benjamin Peterson on 27 November 2010, 14:46:13 UTC
3.1.3 final version bump
Tip revision: 5757429
fix_reduce.py
# 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):

    BM_compatible = True
    order = "pre"

    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('functools', 'reduce', node)
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