Python: Creating a virtual environment

virtualenv is used to manage Python packages for different projects. Using virtualenv allows you to avoid installing Python packages globally which could break system tools or other projects. You can install virtualenv using pip.

Note: If you are using Python 3.3 or newer, the venv module is the preferred way to create and manage virtual environments. venv is included in the Python standard library and requires no additional installation.

Installing virtualenv

python3 -m pip install --user virtualenv

Creating a virtual environment

python3 -m venv env

Activating a virtual environment

source env/bin/activate

Install packages

pip install -r requirements.txt

Freeze requirements

pip freeze > requirements.txt

Leaving the virtual environment

deactivate

Reference:

• python.org