[Pyobjc-dev] Re: [Python-Dev] Pre-PEP: Mutable keys in dictionaries
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From: Guido v. R. <gu...@py...> - 2003-02-06 20:08:35
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> > Could you do this as a subclass of dict? A subclass in Python would > > be inefficient, but might still be good enough for your second use > > case (the ObjC bridge). If not, a subclass in Python might be > > feasible -- it would be a little bit more work than integrating it > > into dictobject.c, but you have a lot less convincing to do, and you > > can even get it to work with Python 2.2. > > But it doesn't solve our problem. We have no control over what > dictionaries are used, either by our users directly or by the Python > library they use. We _do_ have control over the keys that are causing > troubles: our main problem is that we cannot rely on NSString instances > to be immutable, yet we need the ability to use them as keys in > (regular) dicts, just as if they were Python strings. OK, go ahead and try to implement your idea, and report benchmarks here. --Guido van Rossum (home page: http://www.python.org/~guido/) |