Py Modules — Free Python Tutorial

TL;DR: Learn Py Modules in Python with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.

Py Modules in Python

A module is a Python file (.py) containing functions, classes, and variables that you can reuse across multiple programs. Instead of rewriting common logic, you import it.

Python has a rich standard library of built-in modules (no installation needed): math (mathematical functions), random (random numbers), datetime (date and time), os (operating system), json (JSON parsing), csv (CSV files), sys (system), re (regular expressions).

Third-party packages (need pip install): numpy (arrays, maths), pandas (data), matplotlib (charts), requests (HTTP calls), Flask (web framework), sklearn (machine learning). Install with: pip install package-name.

import math            # import full module
from math import sqrt  # import specific function
import math as m       # import with alias

# Standard library modules:
import random, datetime, json, os, sys, re, csv

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