[Solved] What will be the output of this code?class A: def greet(self): return 'Hello from A' class B: def greet(self): return 'Hello from B' class C(A, B): pass obj = C() print(obj.greet()) | Python

Python - Multiple Inheritance and Method Resolution

What will be the output of this code?

class A:
    def greet(self):
        return 'Hello from A'

class B:
    def greet(self):
        return 'Hello from B'

class C(A, B):
    pass

obj = C()
print(obj.greet())

AHello from C

BHello from B

CHello from A

DError: Ambiguous method

Step-by-Step Solution

Solution:

Step 1: Understand method resolution order (MRO)
Python looks for methods in the order of inheritance listed: A then B.
Step 2: Check which greet method is called
Class C inherits from A first, so greet from A is used.
Final Answer:
Hello from A -> Option C
Quick Check:
MRO picks first parent method = Hello from A [OK]

Quick Trick: First parent class method is used if not overridden [OK]

Common Mistakes:

MISTAKES

Assuming method from second parent is called
Expecting error due to ambiguity
Thinking child class defines greet

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What will be the output of this code?

Step 1: Understand method resolution order (MRO)

Step 2: Check which greet method is called

Final Answer:

Quick Check:

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