I got this response below which was extremely helpful...
bennr01 posted 3 days ago 0
So what is the proper procedure for pip'ing in new modules?
The community has written a custom implementation of pip, which is included in StaSh. It works rather well, but does not support any modules depending on C/Fortran code.
To install, copy the following: import requests as r; exec(r.get('https://bit.ly/get-stash').text), then paste it in the python REPL (the console) and exute it. Restart pythonista (force quit using double tap). Afterwards, there is a file called launch_stash.py in the my iphone (or whatever it is called) directory. Run it. It takes a bit of time, but you should then see a bash-like shell. This shell supports pip install <modulename>.