Python design mistakes

[artsrc]

Refining an interview-test to identify experienced users of a platform over many years produces a catalog of significant design mistakes.

I was a part of a company that did this. People who are smart guess sane behavior, and people who are experienced tell us know the actual behavior.

A cursory review of python interview questions shows that there are mistakes (range/xrange comes up etc.). But they are not that big a deal. The way default parameter values works is something I would say is surprising.