Python Coding challenge - Day 1010| What is the output of the following Python Code?

 

Code Explanation:

1. Defining the class

class Toggle:

This defines a class named Toggle.

2. Defining a method

    def on(self):

on is an instance method.

Normally, t.on refers to this method.

3. Reassigning the method name inside itself

        self.on = False

This line creates an instance attribute named on.

It overwrites (shadows) the method on only for this instance.

After this line:

t.__dict__ contains {"on": False}

The method Toggle.on still exists on the class.

4. Returning a value

        return True

The method returns True the first time it is called.

5. Creating an instance

t = Toggle()

An object t of class Toggle is created.

Initially, t.on refers to the method.

6. First access: calling the method

print(t.on(), t.on)

Let’s break this carefully 👇

🔹 t.on()

Python finds on as a method in the class.

The method is called.

Inside the method:

self.on = False creates an instance attribute.

The method returns True.

So t.on() evaluates to True.

🔹 t.on

Python now looks for on in the instance first.

It finds on = False in t.__dict__.

The method is no longer reachable via t.on.

So t.on evaluates to False.

Final Output

True False

400 Days Python Coding Challenges with Explanation