JezK
Edit File: fix_xrange.py
# Copyright 2007 Google, Inc. All Rights Reserved. # Licensed to PSF under a Contributor Agreement. """Fixer that changes xrange(...) into range(...).""" # Local imports from .. import fixer_base from ..fixer_util import Name, Call, consuming_calls from .. import patcomp class FixXrange(fixer_base.BaseFix): BM_compatible = True PATTERN = """ power< (name='range'|name='xrange') trailer< '(' args=any ')' > rest=any* > """ def start_tree(self, tree, filename): super(FixXrange, self).start_tree(tree, filename) self.transformed_xranges = set() def finish_tree(self, tree, filename): self.transformed_xranges = None def transform(self, node, results): name = results["name"] if name.value == "xrange": return self.transform_xrange(node, results) elif name.value == "range": return self.transform_range(node, results) else: raise ValueError(repr(name)) def transform_xrange(self, node, results): name = results["name"] name.replace(Name("range", prefix=name.prefix)) # This prevents the new range call from being wrapped in a list later. self.transformed_xranges.add(id(node)) def transform_range(self, node, results): if (id(node) not in self.transformed_xranges and not self.in_special_context(node)): range_call = Call(Name("range"), [results["args"].clone()]) # Encase the range call in list(). list_call = Call(Name("list"), [range_call], prefix=node.prefix) # Put things that were after the range() call after the list call. for n in results["rest"]: list_call.append_child(n) return list_call 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* > | comparison< any 'in' node=any any*> """ p2 = patcomp.compile_pattern(P2) def in_special_context(self, node): 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): # list(d.keys()) -> list(d.keys()), etc. return results["func"].value in consuming_calls # for ... in d.iterkeys() -> for ... in d.keys(), etc. return self.p2.match(node.parent, results) and results["node"] is node