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"""
Adds this import line:
from builtins import XYZ
for each of the functions XYZ that is used in the module.
"""
from __future__ import unicode_literals
from lib2to3 import fixer_base
from lib2to3.pygram import python_symbols as syms
from lib2to3.fixer_util import Name, Call, in_special_context
from libfuturize.fixer_util import touch_import_top
# All builtins are:
# from future.builtins.iterators import (filter, map, zip)
# from future.builtins.misc import (ascii, chr, hex, input, isinstance, oct, open, round, super)
# from future.types import (bytes, dict, int, range, str)
# We don't need isinstance any more.
replaced_builtins = '''filter map zip
ascii chr hex input next oct open round super
bytes dict int range str'''.split()
expression = '|'.join(["name='{0}'".format(name) for name in replaced_builtins])
class FixFutureBuiltins(fixer_base.BaseFix):
BM_compatible = True
run_order = 9
# Currently we only match uses as a function. This doesn't match e.g.:
# if isinstance(s, str):
# ...
PATTERN = """
power<
({0}) trailer< '(' args=[any] ')' >
rest=any* >
""".format(expression)
def transform(self, node, results):
name = results["name"]
touch_import_top(u'builtins', name.value, node)
# name.replace(Name(u"input", prefix=name.prefix))