"""Fix "for x in f.xreadlines()" -> "for x in f".

This fixer will also convert g(f.xreadlines) into g(f.__iter__)."""

# Author: Collin Winter

# Local imports

from .. import fixer_base

from ..fixer_util import Name

class FixXreadlines(fixer_base.BaseFix):

    PATTERN = """

    power< call=any+ trailer< '.' 'xreadlines' > trailer< '(' ')' > >

    |

    power< any+ trailer< '.' no_call='xreadlines' > >

    """

    def transform(self, node, results):

        no_call = results.get("no_call")

        if no_call:

            no_call.replace(Name("__iter__", prefix=no_call.get_prefix()))

        else:

            node.replace([x.clone() for x in results["call"]])