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

In Python you don't create a prototype per se, but you do need to understand the difference between "class attributes" and instance-level attributes. In the example you've shown above, you are declaring a class attribute on class B, not an instance-level attribute.

This is what you are looking for:

class B():
    def __init__(self):
        self.c = C()