Python Programming · Module 10 of 10

Modules, packages and real projects

Reuse code with modules, install packages with pip, and build real projects.

📖 Key ideas

import math gives you math functions like math.sqrt().
Your own .py file can be imported as a module.
pip install requests installs third-party packages.
Virtual environments (python -m venv venv) keep project packages separate.
Popular uses: web (Django, Flask), data (pandas), AI (scikit-learn), automation (scripts).

💡 Real-life example: Modules are like apps on a phone: install what you need instead of building everything yourself.

importBrings in a module

pipInstalls Python packages

venvSeparate environment per project

requirements.txtList of packages a project needs