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Virtualenv - Python

Virtual Env

How to use

Installation and activation

// Installation
pip install virtualenv

// Create venv with name venv
// option1
virtualenv venv
// option2
virtualenv -p python3 myvenv

// Activate venv
. venv/bin/activate

// DeActivate venv
deactivate

Packages export and import

pip list
pip freeze > requirements.txt
type requirements.txt
virtualenv mydev
. venv/bin/activate
pip list
pip install -r requirements.txt
pip list
deactivate

Install Flask

pip install Flask

Run App

python app.py

// Change env from Prod to Dev
export FLASK_ENV=development