Python Coding challenge - Day 1174| What is the output of the following Python Code?

 

Code Explanation:

🔹 1. Creating a Class

class Test:

✅ Explanation:

A class named Test is created.

This class acts as a blueprint for creating objects.

At this moment:

Test Class Created

🔹 2. Creating a Class Variable

x = 10

✅ Explanation:

x is a class variable.

It belongs to the class itself.

Only one copy exists.

Current state:

Test

 └── x = 10

🔹 3. Creating an Object

obj = Test()

✅ Explanation:

An object named obj is created.

Currently, obj has no instance variables.

Object state:

obj

 └── {}

(Empty namespace)

🔹 4. Accessing obj.x Before Assignment

If we had written:

print(obj.x)

Python would search:

obj namespace ❌

Test namespace ✅

and find:

10

because x exists in the class.

🔹 5. Creating an Instance Variable

obj.x = 50

✅ Explanation:

Many beginners think this changes:

Test.x

❌ Wrong

Python creates a new variable inside the object.

Internally:

obj.__dict__["x"] = 50

Now state becomes:

Test

 └── x = 10

obj

 └── x = 50

🔹 6. Printing Class Variable

print(Test.x)

✅ Explanation:

Python directly accesses:

Test.x

Value:

10

Output:

10

🔹 7. Printing Object Variable

print(obj.x)

✅ Explanation:

Python searches:

obj namespace ✅

and finds:

50

No need to check class.

Output:

50

🎯 Final Output

10

50

Book: 500 Days Python Coding Challenges with Explanation