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Message: [QUOTE="mdsteele, post: 2044500"] Wow, that's a really nice recipe; I didn't even know about the copy_reg module. I'll have to start using that. I did notice one failure mode, however--it doesn't work with methods named __foo because im_func.__name__ contains the *unmangled* version of the function name, so when you try to unpickle the method, the try statement never succeeds and you get an UnboundLocalError on func. The good news is that I think it can be fixed by mangling the name manually in _pickle_method(), like so: def _pickle_method(method): func_name = method.im_func.__name__ obj = method.im_self cls = method.im_class if func_name.startswith('__') and not func_name.endswith('__'): cls_name = cls.__name__.lstrip('_') if cls_name: func_name = '_' + cls_name + func_name return _unpickle_method, (func_name, obj, cls) [/QUOTE]