My website is hosted in a PAAS provider,
made a virtual environment using below command
$ mkvirtualenv --python=/usr/bin/python3.8 mysite-virtualenv
However I can not activate it, please refer the attached image for file structure.
Your virtual environment was created with virtualenvwrapper. Activate it with command workon mysite-virtualenv
in bash console on PythonAnywhere.
For the web app you need to set it on the "Web" configuration page.