1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
Lib/lib2to3/fixes/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(u'functools', u'reduce', node)