Multiple __init__?

test_init.py

class A:
    def __init__(self):
        print("A")
        self.a = 'a'

class B:
    def __init__(self):
        print("B")
        self.b = 'b'

class C(B, A):

    def other_method(self):
        print(self.a, self.b)

C().other_method()

traceback.txt

B
Traceback (most recent call last):
  File "testpy.py", line 16, in <module>
    C().other_method()
  File "testpy.py", line 14, in other_method
    print(self.a, self.b)
AttributeError: 'C' object has no attribute 'a'