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Last week I noticed that the pickle and cPickle modules
cannot handle bound methods. I found a solution that is
simple and (I think) general, so perhaps it should
become part of the standard library.
Here is my code:
import copy_reg
def pickle_bound_method(method):
 return getattr, (method.im_self, method.__name__)
class _Foo:
 def bar(self):
 pass
_foo = _Foo()
copy_reg.constructor(getattr)
copy_reg.pickle(type(_foo.bar), pickle_bound_method)