Unable to use nipyapi in spite of it being in the pip list (project)

Question

I am new to Python and Nifi and I have been asked to use nipyapi for automation testing and connect with my nifi dev board. As you can see in the above screenshot, when I pip install nipyapi, it says the requirement is already satisfied. But when I try to import it in my Python project, it says 'no module name nipyapi'. I am using Python v3.6.