Python Coding challenge - Day 1114| What is the output of the following Python Code?

 

Code Explanation:

1️⃣ Defining the Decorator Function

def deco(func):

Explanation

deco is a decorator function.

It takes another function (func) as input.

2️⃣ Defining Inner Wrapper Function

def wrapper():

Explanation

A function wrapper is defined inside deco.

This function will modify the behavior of the original function.

3️⃣ Modifying the Original Function Output

return func() + 1

Explanation

Calls the original function func().

Adds 1 to its result.

👉 If original returns 5 → wrapper returns:

5 + 1 = 6

4️⃣ Returning Wrapper Function

return wrapper

Explanation

deco returns the wrapper function.

So original function gets replaced by wrapper.

5️⃣ Using Decorator

@deco

def f():

Explanation

This is equivalent to:

f = deco(f)

👉 So now:

f → wrapper function

6️⃣ Original Function Definition

def f():

    return 5

Explanation

Original function returns 5.

But it is now wrapped by decorator.

7️⃣ Calling the Function

print(f())

Explanation

Actually calls:

wrapper()

Which does:

func() + 1 → 5 + 1 = 6

📤 Final Output

6

Book:  700 Days Python Coding Challenges with Explanation