Python Coding challenge - Day 913| What is the output of the following Python Code?

 

Code Explanation:

1. Defining the Parent Class Shape

class Shape:

This line defines a class named Shape

Shape is intended to be a base (parent) class

It represents a general concept of a shape

2. Defining the area() Method

    def area(self):

        raise NotImplementedError

area() is an instance method

raise NotImplementedError means:

“This method must be implemented by the child class”

This is a common Python technique to force method overriding

It behaves like an abstract method, even though we did not use abc module

3. Defining the Child Class Circle

class Circle(Shape):

Circle is a child class of Shape

It inherits all methods of Shape

4. Using pass in Child Class

    pass

pass means no additional implementation

Circle does not override the area() method

So, Circle still uses the parent class version of area()

5. Creating an Object of Circle

obj = Circle()

An object obj of class Circle is created

Since Circle inherits Shape, it has access to area()

6. Calling area() Method

obj.area()

Python looks for area() in Circle

It does not find it

Then Python looks in the parent class Shape

The parent’s area() method is found and executed

7. What Happens Internally?

raise NotImplementedError

Python raises an exception

This stops program execution

It indicates that the method was supposed to be overridden

8. Final Output

NotImplementedError

This is a runtime error, not a printed output.

Final Conclusion

Output:

NotImplementedError

500 Days Python Coding Challenges with Explanation