Python: Virtualenv – Install | Create | (De)activate

virtualenv serves for creating isolated Python environments.

It creates a folder with a copy of Python interpreter and a copy of the pip library which will be used to install other packages in this virtual environment without affecting other projects or system-wide libraries.

virtualenv makes it easier to work on more than one project at a time without introducing conflicts in their dependencies.

From this article you will find out how to install, create, activate and deactivate virtualenv.

Cool Tip: How to install pip on MacOS, Ubuntu, CentOS! Read more →

Install Virtualenv

Install pip:

$ sudo apt install python3-pip

Install the latest versions of virtualenv using pip:

$ sudo pip install --upgrade virtualenv

Create Python Virtualenv

Create a venvs directory to store all virtual environments:

$ mkdir venvs

Create a new virtual environment for your project:

$ virtualenv venvs/<project-name>

Set Python version in virtualenv, if you want to use different Python version:

$ virtualenv -p /usr/bin/python2.7 venvs/<project-name>

(De)activate Python Virtualenv

Activate virtualenv:

$ source venvs/<project-name>/bin/activate

Deactivate virtual Python environment:

$ deactivate

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