Why am I getting an error about my class defining __slots__ when trying to pickle an object?

Question

I\'m trying to pickle an object of a (new-style) class I defined. But I\'m getting the following error:

>>> with open(\'temp/connection.pickle\',\'         


        

Answer 1

Perhaps an attribute of your instance is using __slots__

For example, socket has __slots__ so it can't be pickled

You need to identify which attribute is causing the error and write your own __getstate__ and __setstate__ to ignore that attribute