Python Basics — Modules & Packages

Modules & Packages

As your programs grow, you’ll need to organize code into reusable pieces. Python’s module and package system makes this easy — and gives you access to thousands of pre-built libraries.

What You’ll Learn

#	Topic	What You’ll Master
1	Importing Modules	import, from…import, import…as
2	Standard Library Tour	Python’s built-in modules
3	Creating Modules	Writing your own reusable modules
4	Packages & __init__.py	Organizing modules into packages
5	Virtual Environments & pip	Managing dependencies
6	Practice Exercises	Test your understanding

Quick Preview

# Using a built-in module
import math
print(math.sqrt(144))  # 12.0

# Using a specific function
from datetime import datetime
print(datetime.now().strftime("%Y-%m-%d"))  # 2025-03-03

# Using a third-party package (install with pip)
# pip install requests
import requests
response = requests.get("https://api.github.com")
print(response.status_code)  # 200

Module vs Package

Concept	What It Is	Example
Module	A single .py file	math.py, helpers.py
Package	A directory of modules with __init__.py	mypackage/
Library	A collection of packages	requests, numpy
Framework	A library with a structure/pattern	Django, Flask

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Start Learning: Importing Modules →