Python Venv Command Guide

Venv creates isolated Python environments.

Top 10 Useful Commands

1. Create Env

python3 -m venv myenv

Explanation: Create 'myenv' folder.

2. Activate (Linux)

source myenv/bin/activate

Explanation: Enter the environment.

3. Activate (Windows)

myenv\Scripts\activate

Explanation: Enter on Windows.

4. Install Package

pip install requests

Explanation: Install into isolated env only.

5. Freeze

pip freeze > requirements.txt

Explanation: Save dependency list.

6. Install from File

pip install -r requirements.txt

Explanation: Restore dependencies.

7. Deactivate

deactivate

Explanation: Exit environment.

8. Check Path

which python

Explanation: Verify you are using the venv python.

9. Delete Env

rm -rf myenv/

Explanation: Delete the folder to remove env.

10. Upgrade Pip

pip install --upgrade pip

Explanation: Update pip inside env.

The Most Powerful Command

python3 -m venv venv && source venv/bin/activate && pip install -r requirements.txt

Explanation: The standard "bootstrapping" one-liner for any Python project.