[jonjacky]

> "Python, huh? Seems like typos in uncommon branches of the code would cause it to randomly fail at runtime, losing your work!"

Maybe not - Python itself can provide some crash protection. Run it this way: python -i run_pyvim.py. Then if pyvim crashes, Python will still be running with all your work still there. Maybe you can just type run() at the Python prompt to resume the session in almost the state you left it -- depending on how run() is coded, how much re-initialization it does.