I don't know if there's a clear answer to (1), but with respect to (2) I believe there is precedent that the copyright owner would have a strong case if they ha

I don't know if there's a clear answer to (1), but with respect to (2) I believe there is precedent that the copyright owner would have a strong case if they had reason to believe the python library author had seen their work and it played a roll in the transcription to python. You can't look at a GPL work and literally transcribe it to license launder. Companies have tried. You can implement a similar idea in a clean room, though.