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