Python Coding challenge - Day 1220| What is the output of the following Python Code?

 

Code Explanation:

🔹 1. Importing the importlib Module

import importlib

✅ Explanation

importlib is Python's built-in import library.

It allows you to import modules dynamically while the program is running.

Unlike the normal import statement, you can provide the module name as a string.

Think of it as a module loader.

Program

↓

importlib

↓

Load Module Dynamically

Nothing is imported yet except the importlib module itself.

🔹 2. Dynamically Importing the math Module

math = importlib.import_module("math")

✅ Explanation

Python loads the math module during program execution.

Internally, this behaves almost like:

import math

The string

"math"

tells Python which module to import.

Current Memory

math

↓

Math Module

The variable math now points to the imported module.

🔹 3. Understanding import_module()

importlib.import_module("math")

✅ Explanation

import_module() accepts the module name as a string.

Syntax:

importlib.import_module(module_name)

Example:

"math"

↓

Load math Module

↓

Return Module Object

This is useful when the module name is determined at runtime.

🔹 4. Accessing the factorial() Function

math.factorial

✅ Explanation

The math module contains many mathematical functions such as:

sqrt()

factorial()

ceil()

floor()

pow()

sin()

Here, Python accesses the factorial() function.

Current Structure

Math Module

│

├── sqrt()

├── factorial()

├── ceil()

└── floor()

🔹 5. Calling factorial(4)

math.factorial(4)

✅ Explanation

The factorial() function calculates the product of all positive integers from 1 to the given number.

Calculation:

4!

↓

4 × 3 × 2 × 1

↓

24

Returned value

24

🔹 6. Printing the Result

print(math.factorial(4))

✅ Explanation

Python prints the returned value.

Output

24

🎯 Final Output

24

Book: 900 Days Python Coding Challenges with Explanation