gohlke/pythonlibs/: Search will have to use a custom function.  If direct download from url by pip does not work, then we write a custom function to download to a temp file and pip install from local file.  (This is suggestion on site.)

runpip: It would be nice if import and main(...) could be made to work by reloading the module (to refresh the cache), but if not, subprocess should work as a backup.  Having 'run pip command' encapsulated makes it easy to switch without affecting the rest of the code.

Additional features: Raymond's list is not a firm cutoff.  I an not sure what a 'proxy' is in this context and have no sense of what will be useful, especially to beginners, rather than clutter.  But I am willing to be educated and persuaded.  And there are other people, including a second mentor for this project, who can give opinions.