>It's the sort of library that you discover your inherited codebase is using, and just say, "fuckfuckfuck...", because it implies that the author cares more about pushing round pegs into square holes than writing the freaking application code

Ugh, this really hits home.

I just started a new day-job where I'm essentially being asked to un-fuck a python codebase. Your statement neatly captures my feelings when I discovered the presence of hacked-together singleton classes littered throughout the thing.

Good luck unit-testing that...