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# Copyright 2006 Georg Brandl. # Licensed to PSF under a Contributor Agreement. """Fixer for intern(). intern(s) -> sys.intern(s)""" # Local imports from .. import pytree from .. import fixer_base from ..fixer_util import Name, Attr, touch_import class FixIntern(fixer_base.BaseFix): BM_compatible = True order = "pre" PATTERN = """ power< 'intern' trailer< lpar='(' ( not(arglist | argument<any '=' any>) obj=any | obj=arglist<(not argument<any '=' any>) any ','> ) rpar=')' > after=any* > """ def transform(self, node, results): if results: # I feel like we should be able to express this logic in the # PATTERN above but I don't know how to do it so... obj = results['obj'] if obj: if obj.type == self.syms.star_expr: return # Make no change. if (obj.type == self.syms.argument and obj.children[0].value == '**'): return # Make no change. syms = self.syms obj = results["obj"].clone() if obj.type == syms.arglist: newarglist = obj.clone() else: newarglist = pytree.Node(syms.arglist, [obj.clone()]) after = results["after"] if after: after = [n.clone() for n in after] new = pytree.Node(syms.power, Attr(Name(u"sys"), Name(u"intern")) + [pytree.Node(syms.trailer, [results["lpar"].clone(), newarglist, results["rpar"].clone()])] + after) new.prefix = node.prefix touch_import(None, u'sys', node) return new