Python Mastery – From Basics to Brilliance / Modules & Packages

Virtual environments

🌐 Virtual Environments

A virtual environment is an isolated Python environment created for a project.

It allows each project to have its own packages and package versions without affecting other projects.

🤔 Why Use Virtual Environments?

Suppose you have two projects:

Project A → Django 4
Project B → Django 5

Installing both globally can cause version conflicts.

With virtual environments:

📁 Project A
   └── 🐍 Virtual Environment → Django 4

📁 Project B
   └── 🐍 Virtual Environment → Django 5

Each project stays independent.

🛠️ Create a Virtual Environment

python -m venv venv

Here:

  • python -m venv → Creates a virtual environment

  • venv → Name of the environment

▶️ Activate It

Windows

venv\Scripts\activate

macOS / Linux

source venv/bin/activate

Once activated, packages installed using pip are installed inside that environment.

pip install requests

❌ Deactivate

When you're finished:

deactivate

Virtual Environment = A separate Python workspace for each project.