How can I pickle a dynamically created nested class in python?

Question

I have a nested class:

class WidgetType(object):
    
    class FloatType(object):
        pass
    
    class TextType(object):
        pass

.. and

Answer 1

Pickle only works with classes defined in module scope (top level). In this case, it looks like you could define the nested classes in module scope and then set them as properties on WidgetType, assuming there's a reason not to just reference TextType and FloatType in your code. Or, import the module they're in and use widget_type.TextType and widget_type.FloatType.