python built in module


Python Built-in Modules simple example with result



Python Built-in Modules – Simple Examples with Results

Python provides many built-in modules that help us perform common tasks without installing external packages.

1. math Module

Used for mathematical operations.

import math

 

num = 25

 

print("Square root:", math.sqrt(num))

print("Power:", math.pow(2, 3))

print("Value of Pi:", math.pi)

Result:

Square root: 5.0

Power: 8.0

Value of Pi: 3.141592653589793

2. random Module

Used to generate random numbers.

import random

 

number = random.randint(1, 10)

 

print("Random number:", number)

Possible Result:

Random number: 7

The result can be different each time.

3. datetime Module

Used to work with dates and times.

import datetime

 

today = datetime.date.today()

 

print("Today's date:", today)

Result (example):

Today's date: 2026-10-03

4. os Module

Used to work with the operating system.

import os

 

print("Current folder:")

print(os.getcwd())

Result:

Current folder:

C:\Users\Student\Python

The result depends on where the Python program is running.

5. statistics Module

Used for basic statistical calculations.

import statistics

 

marks = [60, 70, 80, 90, 100]

 

print("Average:", statistics.mean(marks))

print("Median:", statistics.median(marks))

Result:

Average: 80

Median: 80

6. calendar Module

Used to display calendars.

import calendar

 

print(calendar.month(2026, 10))

Result:

    October 2026

Mo Tu We Th Fr Sa Su

          1  2  3  4

 5  6  7  8  9 10 11

12 13 14 15 16 17 18

19 20 21 22 23 24 25

26 27 28 29 30 31

7. sys Module

Used to get information about the Python system.

import sys

 

print("Python Version:")

print(sys.version)

Possible Result:

Python Version:

3.14.0 ...

Common Python Built-in Modules

Module

Main Use

Example

math

Mathematics

sqrt(), pow()

random

Random values

randint()

datetime

Date & time

date.today()

os

Operating system

getcwd()

statistics

Statistics

mean()

calendar

Calendar

month()

sys

Python system information

sys.version

json

JSON data

json.dumps()

re

Pattern matching

re.search()

time

Time-related functions

time.sleep()

Simple definition: A module is a Python file/library containing functions, classes, and variables that we can reuse in our programs using import.

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