MRO

>>> class Parent:
...     def spam(self):
...             print('Parent.spam')
... 
>>> class A(Parent):
...     def spam(self):
...             print('A.spam')
...             super().spam()
... 
>>> class B(A):
...     def spam(self):
...             print('B.spam')
...             super().spam()
... 
>>> class C(Parent):
...     def spam(self):
...             print('C.spam')
...             super().spam()
... 
>>> class D(Parent):
...     def spam(self):
...             print('D.spam')
...             super().spam()
... 
>>> class E(A, C, D):
...     pass
... 
>>> e = E()
>>> e.spam()
A.spam
C.spam
D.spam
Parent.spam
>>> 
>>> 
>>> class F(C, D, A):
...     pass
... 
>>> f = F()
>>> f.spam()
C.spam
D.spam
A.spam
Parent.spam
>>> 
>>> A.__mro__
(<class '__main__.A'>, <class '__main__.Parent'>, <class 'object'>)
>>> B.__mro__
(<class '__main__.B'>, <class '__main__.A'>, <class '__main__.Parent'>, <class 'object'>)
>>> C.__mro__
(<class '__main__.C'>, <class '__main__.Parent'>, <class 'object'>)
>>> E.__mro__
(<class '__main__.E'>, <class '__main__.A'>, <class '__main__.C'>, <class '__main__.D'>, <class '__main__.Parent'>, <class 'object'>)