Creating and using virtualenv

To create a virtualenv, run

virtualenv NAME_OF_VIRTUALENV

On Ubuntu 18, this command will create virtualenv with Python 2.7.

To create virtualenv with Python 3, run

virtualenv --python=/usr/bin/python3 venv

Here “venv” is my virtualenv name.

To activate virtialenv, go to the folder where your virtialenv folder is present, then run

source venv/bin/activate

You will see name of your virtualenv on the command promt. To exit out of virtualenv, run

deactivate

This can be run from any folder.