u""" Fixer for "class Foo: ..." -> "class Foo(object): ..." """ from lib2to3 import fixer_base from lib2to3.fixer_util import LParen, RParen, Name from libfuturize.fixer_util import touch_import_top def insert_object(node, idx): node.insert_child(idx, RParen()) node.insert_child(idx, Name(u"object")) node.insert_child(idx, LParen()) class FixNewstyle(fixer_base.BaseFix): # Match: # class Blah: # and: # class Blah(): PATTERN = u"classdef< 'class' NAME ['(' ')'] colon=':' any >" def transform(self, node, results): colon = results[u"colon"] idx = node.children.index(colon) if (node.children[idx-2].value == '(' and node.children[idx-1].value == ')'): del node.children[idx-2:idx] idx -= 2 insert_object(node, idx) touch_import_top(u'builtins', 'object', node)