I wonder how much time it would take with some samples from GitHub, and various documentation about python laying around (languages, cheatsheet, libraries)...

10 minutes tops, once you have the idea and you've thought it through a bit just spamming out the code isn't that hard nor does it take that long. If there's anything surprising (e.g. function call returns something a bit different than expected) it's fast enough to just read the docs and change your mental model slightly.