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| 1 u""" |
| 2 Fixer for: |
| 3 it.__next__() -> it.next(). |
| 4 next(it) -> it.next(). |
| 5 """ |
| 6 |
| 7 from lib2to3.pgen2 import token |
| 8 from lib2to3.pygram import python_symbols as syms |
| 9 from lib2to3 import fixer_base |
| 10 from lib2to3.fixer_util import Name, Call, find_binding, Attr |
| 11 |
| 12 bind_warning = u"Calls to builtin next() possibly shadowed by global binding" |
| 13 |
| 14 |
| 15 class FixNext(fixer_base.BaseFix): |
| 16 |
| 17 PATTERN = u""" |
| 18 power< base=any+ trailer< '.' attr='__next__' > any* > |
| 19 | |
| 20 power< head='next' trailer< '(' arg=any ')' > any* > |
| 21 | |
| 22 classdef< 'class' base=any+ ':' |
| 23 suite< any* |
| 24 funcdef< 'def' |
| 25 attr='__next__' |
| 26 parameters< '(' NAME ')' > any+ > |
| 27 any* > > |
| 28 """ |
| 29 |
| 30 def transform(self, node, results): |
| 31 assert results |
| 32 |
| 33 base = results.get(u"base") |
| 34 attr = results.get(u"attr") |
| 35 head = results.get(u"head") |
| 36 arg_ = results.get(u"arg") |
| 37 if arg_: |
| 38 arg = arg_.clone() |
| 39 head.replace(Attr(Name(unicode(arg),prefix=head.prefix), |
| 40 Name(u"next"))) |
| 41 arg_.remove() |
| 42 elif base: |
| 43 attr.replace(Name(u"next", prefix=attr.prefix)) |
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