Python Coding challenge - Day 1175| What is the output of the following Python Code?

 

Explanation:

🔹 1. Importing partial

from functools import partial

✅ Explanation:

partial is imported from Python's built-in functools module.

partial() is used to create a new function by fixing (pre-filling) some arguments of an existing function.

Think of it as:

Original Function

      ↓

Fix Some Arguments

      ↓

New Function

🔹 2. Creating a Lambda Function

add = lambda a, b: a + b

✅ Explanation:

A lambda function is created.

Equivalent to:

def add(a, b):

    return a + b

This function takes:

a

b

and returns:

a + b

Example:

add(10, 5)

returns:

15

🔹 3. Creating a Partial Function

add10 = partial(add, 10)

✅ Explanation:

Here:

partial(add, 10)

creates a new function.

Python fixes:

a = 10

permanently.

Internally it behaves like:

def add10(b):

    return add(10, b)

So:

add10(5)

becomes:

add(10, 5)

🔹 4. Internal State After partial

Current situation:

add(a, b)

Original function:

Needs 2 arguments

After:

add10 = partial(add, 10)

New function:

add10(b)

Only needs:

1 argument

because:

a = 10

is already fixed.

🔹 5. Calling Partial Function

print(add10(5))

✅ Explanation:

Python executes:

add10(5)

which internally becomes:

add(10, 5)

🔹 6. Lambda Execution

Original function:

lambda a, b: a + b

Substitute values:

a = 10

b = 5

Calculation:

10 + 5

Result:

15

🔹 7. Printing Result

print(add10(5))

prints:

15

🎯 Final Output

15

Book: 100 Python Programs for Beginner with explanation