lib-python.2.7.lib2to3.fixes.fix_reduce.py Maven / Gradle / Ivy

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# 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 ','
                 not(argument
    >
    """

    def transform(self, node, results):
        touch_import(u'functools', u'reduce', node)