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Needed a tool, didn't want to write it myself, found something that's almost what I needed, modified the Python to add the missing feature in a hacky works for me but would be totally inappropriate to upstream way.
I don't know Python but I can read the code, search for documentation, make reasonable guesses, see what the error messages say, &c.
I seem to do this about once every 3-5 years (modifying someone else's Python, generally having no idea what I'm doing, but making it work in the end).