Does Python have class prototypes (or forward declarations)?

Question

I have a series of Python classes in a file. Some classes reference others.

My code is something like this:

class A():
    pass

class B():
    c = C         


        

Answer 1

All correct answers about class vs instance attributes. However, the reason you have an error is just the order of defining your classes. Of course class C has not yet been defined (as class-level code is executed immediately on import):

class A():
    pass

class C():
    pass

class B():
    c = C()

Will work.