ModuleNotFoundError: No module named 'python_arptable'

In a WSGI application I got this error message. In a Bash console I used pip3 in order to load the module, but no effect. How can I solve this problem? Thanks for any help! Hans

Install the module into the version of Python/virtualenv that you're using to run your web app. pip3.7 will install into Python 3.7 - use the one that matches your web app Python version.

Thank you! It works.

Glad to hear that!