Example: import pickle def function(): def closure(): pass return closure pickle.dumps(function()) Which yields: AttributeError: Can't pickle local object 'function.<locals>.closure' There is this question How to refactor method returning closure to be pickleable? which has an answer that suggests import dill as pickle - but in my case that would require monkey patching. Since I also found some examples Can Python pickle lambda functions? on how to pickle lambda functions (which isn't support by pickle out of the box either), I have some hope that there is a way to actually pickle function() with stdlib pickle - only by refactoring above code example. Continue reading...
