diff -r ffa851df0825 -r 2fb8b9db1c86 symbian-qemu-0.9.1-12/python-2.6.1/Lib/lib2to3/fixes/fix_dict.py --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/symbian-qemu-0.9.1-12/python-2.6.1/Lib/lib2to3/fixes/fix_dict.py Fri Jul 31 15:01:17 2009 +0100 @@ -0,0 +1,99 @@ +# 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()) + +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') > + 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("iter") + if isiter: + method_name = method_name[4:] + assert method_name in ("keys", "items", "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.get_prefix())]), + results["parens"].clone()] + new = pytree.Node(syms.power, args) + if not special: + new.set_prefix("") + new = Call(Name(isiter and "iter" or "list"), [new]) + if tail: + new = pytree.Node(syms.power, [new] + tail) + new.set_prefix(node.get_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