> > I'n curious about abstract_isinstance -- is that what you checked in > > last night? > > Yes. > > > I thought that was for 2.2 but I may have misunderstood > > the issue (I have to admit I have no idea what abstract_isinstance > > does any more :-( ). > > No, abstract_isinstance has been broken for a long time, maybe forever. > It is supposed to work for class-like objects like ExtensionClass > instances as well as for standard classes and types. One problem was > that if you gave it a normal instance as the first argument but an > ExtensionClass as the second argument it raised a type error. It's > annoying to us at the MEMS Exchange because we use ExtensionClasses and > isinstance all the time (Greg likes type checking). We ended up > rewriting isinstance() and issubclass() in Python. The average Python > user doesn't care. Then I'm not sure if this should be fixed in 2.1.2. It's almost a new feature that it doesn't bomb out. :-( --Guido van Rossum (home page: http://www.python.org/~guido/)
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