| u""" | |
| Fixer for: | |
| it.__next__() -> it.next(). | |
| next(it) -> it.next(). | |
| """ | |
| from lib2to3.pgen2 import token | |
| from lib2to3.pygram import python_symbols as syms | |
| from lib2to3 import fixer_base | |
| from lib2to3.fixer_util import Name, Call, find_binding, Attr | |
| bind_warning = u"Calls to builtin next() possibly shadowed by global binding" | |
| class FixNext(fixer_base.BaseFix): | |
| PATTERN = u""" | |
| power< base=any+ trailer< '.' attr='__next__' > any* > | |
| | | |
| power< head='next' trailer< '(' arg=any ')' > any* > | |
| | | |
| classdef< 'class' base=any+ ':' | |
| suite< any* | |
| funcdef< 'def' | |
| attr='__next__' | |
| parameters< '(' NAME ')' > any+ > | |
| any* > > | |
| """ | |
| def transform(self, node, results): | |
| assert results | |
| base = results.get(u"base") | |
| attr = results.get(u"attr") | |
| head = results.get(u"head") | |
| arg_ = results.get(u"arg") | |
| if arg_: | |
| arg = arg_.clone() | |
| head.replace(Attr(Name(unicode(arg),prefix=head.prefix), | |
| Name(u"next"))) | |
| arg_.remove() | |
| elif base: | |
| attr.replace(Name(u"next", prefix=attr.prefix)) | |