In [9]: class A(object):                                                                                                                                                                  [3/52]
   ...:     def __init__(self, x):
   ...:         print("A")
   ...:         super().__init__()
   ...:

In [10]: class B(object):
    ...:     def __init__(self, x):
    ...:         print("B")
    ...:         super().__init__()
    ...:

In [11]: class C(A, B):
    ...:     def __init__(self, x):
    ...:         print("C")
    ...:         super().__init__(x)
    ...:

In [13]: C("x")
C
A
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-13-001bd463ab56> in <module>()
----> 1 C("x")

<ipython-input-11-632bc831e6be> in __init__(self, x)
      2     def __init__(self, x):
      3         print("C")
----> 4         super().__init__(x)
      5

<ipython-input-9-51f4d8e73a3b> in __init__(self, x)
      2     def __init__(self, x):
      3         print("A")
----> 4         super().__init__()
      5

<ipython-input-9-51f4d8e73a3b> in __init__(self, x)
      2     def __init__(self, x):
      3         print("A")
----> 4         super().__init__()
      5

TypeError: __init__() missing 1 required positional argument: 'x'