"""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): BM_compatible = True 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.prefix)) else: node.replace([x.clone() for x in results["call"]])