"""Fixer that addes parentheses where they are required
This converts ``[x for x in 1, 2]`` to ``[x for x in (1, 2)]``."""
# By Taek Joo Kim and Benjamin Peterson
from .. import fixer_base
from ..fixer_util import LParen, RParen
# XXX This doesn't support nested for loops like [x for x in 1, 2 for x in 1, 2]
class FixParen(fixer_base.BaseFix):
target=testlist_safe< any (',' any)+ [',']
target=testlist_safe< any (',' any)+ [',']
def transform(self, node, results):
target = results["target"]
lparen.prefix = target.prefix
target.prefix = u"" # Make it hug the parentheses
target.insert_child(0, lparen)
target.append_child(RParen())