[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 A

BError: Method greet not found

CHello from C

DHello from B

Step-by-Step Solution

Solution:

Step 1: Understand method resolution order (MRO)
Python looks for methods in the order of parent classes listed. Here, C inherits from A first, then B.
Step 2: Determine which greet method is called
Since A is first, C uses A's greet method, returning 'Hello from A'.
Final Answer:
Hello from A -> Option A
Quick Check:
MRO uses first parent method [OK]

Quick Trick: First parent class method is used in conflicts [OK]

Common Mistakes:

MISTAKES

Choosing method from second parent
Expecting child's own method when none defined
Thinking it causes error

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What will be the output of this code?

Step 1: Understand method resolution order (MRO)

Step 2: Determine which greet method is called

Final Answer:

Quick Check:

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