Python Coding challenge - Day 1290| What is the output of the following Python Code?

 

Code Explanation:

1. Defining the Class

class Test:

- The class keyword is used to define a class named Test.

- A class acts as a blueprint for creating objects.

- Here, the class contains a class variable and a static method.

2. Creating a Class Variable

x = 10

- The variable x is defined inside the class but outside any method.

- It is called a class variable because it belongs to the class.

- Its initial value is 10.

- It can be accessed using Test.x.

3. Using the @staticmethod Decorator

@staticmethod

- This decorator defines the method below it as a static method.

- A static method does not automatically receive self or cls as its first argument.

- It can be called through the class or an instance.

4. Defining the Static Method

def show(): return Test.x

- The show() method returns the value of Test.x.

- It directly accesses the class variable through the class name Test.

- Because it uses Test.x, it reads the class variable rather than an instance-specific attribute.

5. Creating an Object

obj = Test()

- Test() creates an instance of the Test class.

- The created object is assigned to the variable obj.

- Initially, obj can access the class variable x, whose value is 10.

6. Creating an Instance Attribute

obj.x = 20

- This statement creates an instance attribute named x on obj.

- Its value is set to 20.

- It does not change the class variable Test.x, which remains 10.

- The instance attribute shadows the class variable when accessing obj.x.

7. Calling the Method and Printing Values

print(obj.show(), Test.x)

- obj.show() calls the static method.

- The method returns Test.x, which is 10.

- Test.x also evaluates to 10 because the class variable was not modified.

- The instance attribute obj.x = 20 does not affect the method, because the method explicitly accesses Test.x.

Final Output

10 10

Books: 100 Python Programs for Beginner with explanation