CODEWITHSUNDEEP
pythonoopinheritance
Aman Raheja
Aman Raheja

Reputation: 615

Unexpected results when learning about inheritance

I am learning inheritance and got this problem

class A:
    def test(self):
        print("test of A called")
class B(A):
    def test(self):
        print("test of B called")
        super().test()  
class C(A):
    def test(self):
        print("test of C called")
        super().test()
class D(B,C):
    def test2(self):
        print("test of D called")      
obj=D()
obj.test()

The output is below according to the website where this ques was posted

test of B called
test of C called
test of A called

But in my opinion, the output should be

test of B called
test of A called

Because, class B will be called first (Acc to MRO), and then super().test() is called from class B which will print test of A called.

Where am I wrong here?

Upvotes: 2

Views: 84

Answers (2)

Yogesh Kumar Wadhwa
Yogesh Kumar Wadhwa

Reputation: 49

Paste your code her [http://pythontutor.com/visualize.html][1] and Visulize line by line. I hope its help.

Upvotes: 0

luther
luther

Reputation: 5564

Short answer: When B.test calls super().test(), it uses the MRO of the original object. It doesn't just look at B's hierarchy.

Upvotes: 3

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