Python docstring type annotation — a class, not an instance?

Question

Let\'s say I have:

class A(object):
   pass

class B(A):
   pass

I want to declare a function that takes a subclass of A as an argument:

Answer 1

According to the pycharm docs as close as you can get is:

() -> SomeClass

So in your example

def do_something(klass):
   """
   :type klass: () -> A
   """
   pass

This means (for PyCharm) that the argument you are providing is a function that returns an object of a given type. It will properly type hint anything after the object creation.