Python Virtualenv

Virtualenv is a tool to create isolated Python environments.

This way, you can create virtual Python environments and install the Python libraries you need there without affecting your host OS. This is something interesting for developers who may have multiple Virtualenvs with diferent dependencies of their programs.
viertualenv /path/to/new/virtual/environment.
https://virtualenv.pypa.io/en/latest/

Additionally, virtual environments can be used for Python wsgi apps on web servers.

Also you can use venv Python command like this:
python -m venv /path/to/new/virtual/environment
https://docs.python.org/es/3/library/venv.html