Python Coding challenge - Day 1028| What is the output of the following Python Code?

 

Code Explanation:

1. Defining the Base Class

class Base:

A class named Base is defined.

This class will act as a parent class for other classes.

2. Defining __init_subclass__

    def __init_subclass__(cls):

        cls.tag = cls.__name__.lower()

__init_subclass__ is a special hook method.

Python automatically calls it every time a subclass of Base is created.

cls refers to the new subclass, not Base.

3. Creating Subclass A

class A(Base): pass

What happens internally:

Python creates the class A.

Because A inherits from Base, Python calls:

Base.__init_subclass__(A)

Inside the method:

cls.__name__ → "A"

"A".lower() → "a"

A.tag = "a" is created.

4. Creating Subclass B

class B(Base): pass

What happens internally:

Python creates the class B.

Because B inherits from Base, Python calls:

Base.__init_subclass__(B)

Inside the method:

cls.__name__ → "B"

"B".lower() → "b"

B.tag = "b" is created.

5. Printing the Values

print(A.tag, B.tag)

A.tag → "a"

B.tag → "b"

6. Final Output

a b

✅ Final Answer

✔ Output:

a b

900 Days Python Coding Challenges with Explanation