General Development question

I downloaded a 3rd party library using pip into my ha virtual environment. Turns out it was written in python2 not 3 and is giving me problems. I want to go through and try to port it to 3. I cloned the repository from github and have it in a directory in my code directory. The source code seems to be in a file called First, that seems strange to me. Second, if I make the changes in that file, how do I get it to where I can use it in my appdaemon files? Do I just copy it over the one that got installed when I did the pip install???