We have the classes A and B defined as follows −
class A(object): pass class B(A): pass
B can be proved to be a sub class of A in two ways as follows
class A(object):pass class B(A):pass print issubclass(B, A) # Here we use the issubclass() method to check if B is subclass of A print B.__bases__ # Here we check the base classes or super classes of B
This gives the output
True (<class '__main__.A'>,)