Why didn't you help your teammate?

A PhD doesn't mean that a person knows everything. It means they made progress in understanding in a narrow area. Might not have included Python.

He was beyond help. That was far from being the only issue.

That's judgemental. Collaboration couldn't have hurt.

I could spend a day doing the hackaton project or I could spend it teaching basic computing to someone who thinks himself an expert and is unwilling to learn. But I can't stop time, so can't do both.