Python Coding challenge - Day 1015| What is the output of the following Python Code?

 

Code Explanation:

1. Defining the class

class Test:

This line defines a class named Test.

2. Defining an instance method

    def f(self):

f is an instance method.

Normally, t.f refers to this method.

3. Assigning to the same name inside the method

        self.f = 5

This line creates an instance attribute named f.

It overwrites (shadows) the method f for this specific object.

After this line runs:

t.__dict__ = {'f': 5}

4. Returning a value

        return 1

The method returns the integer 1.

5. Creating an instance

t = Test()

An object t of class Test is created.

At this moment, t.f still refers to the method.

6. Calling and accessing in print

print(t.f(), t.f)

Let’s evaluate left to right 👇

🔹 First: t.f()

Python finds f as a method in class Test.

The method is called.

Inside the method:

self.f = 5 creates an instance attribute.

1 is returned.

So t.f() evaluates to 1.

🔹 Second: t.f

Python now looks for f in the instance first.

It finds f = 5 in t.__dict__.

The method is no longer visible via t.f.

So t.f evaluates to 5.

✅ Final Output

1 5

400 Days Python Coding Challenges with Explanation