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usr
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lib64
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python2.6
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lib2to3
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fixes
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/usr/lib64/python2.6/lib2to3/fixes
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__init__.py
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__init__.pyc
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/usr/lib64/python2.6/lib2to3/fixes/fix_dict.py
(3798B)
# Copyright 2007 Google, Inc. All Rights Reserved. # Licensed to PSF under a Contributor Agreement. """Fixer for dict methods. d.keys() -> list(d.keys()) d.items() -> list(d.items()) d.values() -> list(d.values()) d.iterkeys() -> iter(d.keys()) d.iteritems() -> iter(d.items()) d.itervalues() -> iter(d.values()) d.viewkeys() -> d.keys() d.viewitems() -> d.items() d.viewvalues() -> d.values() Except in certain very specific contexts: the iter() can be dropped when the context is list(), sorted(), iter() or for...in; the list() can be dropped when the context is list() or sorted() (but not iter() or for...in!). Special contexts that apply to both: list(), sorted(), tuple() set(), any(), all(), sum(). Note: iter(d.keys()) could be written as iter(d) but since the original d.iterkeys() was also redundant we don't fix this. And there are (rare) contexts where it makes a difference (e.g. when passing it as an argument to a function that introspects the argument). """ # Local imports from .. import pytree from .. import patcomp from ..pgen2 import token from .. import fixer_base from ..fixer_util import Name, Call, LParen, RParen, ArgList, Dot from .. import fixer_util iter_exempt = fixer_util.consuming_calls | set(["iter"]) class FixDict(fixer_base.BaseFix): PATTERN = """ power< head=any+ trailer< '.' method=('keys'|'items'|'values'| 'iterkeys'|'iteritems'|'itervalues'| 'viewkeys'|'viewitems'|'viewvalues') > parens=trailer< '(' ')' > tail=any* > """ def transform(self, node, results): head = results["head"] method = results["method"][0] # Extract node for method name tail = results["tail"] syms = self.syms method_name = method.value isiter = method_name.startswith(u"iter") isview = method_name.startswith(u"view") if isiter or isview: method_name = method_name[4:] assert method_name in (u"keys", u"items", u"values"), repr(method) head = [n.clone() for n in head] tail = [n.clone() for n in tail] special = not tail and self.in_special_context(node, isiter) args = head + [pytree.Node(syms.trailer, [Dot(), Name(method_name, prefix=method.prefix)]), results["parens"].clone()] new = pytree.Node(syms.power, args) if not (special or isview): new.prefix = u"" new = Call(Name(u"iter" if isiter else u"list"), [new]) if tail: new = pytree.Node(syms.power, [new] + tail) new.prefix = node.prefix return new P1 = "power< func=NAME trailer< '(' node=any ')' > any* >" p1 = patcomp.compile_pattern(P1) P2 = """for_stmt< 'for' any 'in' node=any ':' any* > | comp_for< 'for' any 'in' node=any any* > """ p2 = patcomp.compile_pattern(P2) def in_special_context(self, node, isiter): if node.parent is None: return False results = {} if (node.parent.parent is not None and self.p1.match(node.parent.parent, results) and results["node"] is node): if isiter: # iter(d.iterkeys()) -> iter(d.keys()), etc. return results["func"].value in iter_exempt else: # list(d.keys()) -> list(d.keys()), etc. return results["func"].value in fixer_util.consuming_calls if not isiter: return False # for ... in d.iterkeys() -> for ... in d.keys(), etc. return self.p2.match(node.parent, results) and results["node"] is node
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