Scan Python packages for provided modules and required dependencies

[livingsilver94]

Following last night's discussion, I'm creating an issue to track Python code scanning in search of modules provided and dependencies required.

We want moss to auto-detect dependencies of Python packages, which isn't easy given the interpreted behavior of Python. We also want to track what modules a certain Python package provides, according to our tooling's goal.

Here I'm showing a proof-of-concept code that scans the site-packages directory and lists all modules a Python package contains. The code is short and simple, shouldn't be hard to port it to moss.

Dependencies are a different beast. In my script I'm commenting the difficulties, and what we can do about them.
Note that GitHub doesn't allow uploading .py files, so I'm renaming it into .txt. python_deps_provides.py.txt