Pickling dynamically generated classes?

Question

I\'m using type() to dynamically generate classes that will ultimately be pickled. The problem is that the un-pickling process needs the definition of the class

Answer 1

You can assign a global name to your dynamically generated class to make it picklable.

>>> class Foo(object):
...     pass
>>> class_name = 'Goo'
>>> my_class = type(class_name, (Foo, ), {'run': lambda self, x: 2*x })
>>> globals()[class_name] = my_class
>>> g = my_class()
>>> pickle.dumps(g)

Of course, you need to make sure that the names of your classes are unique.