This week, I discovered the location of and then deployed the fix for a deadlock in a python codebase. It actually took me about the full week to do this (with a bunch of other stuff happening on the side).
It was a particularly nasty bug and python did not make debugging it easy. Worst part was that it was non deterministic and seemingly only happened in production. Ended up adding a ridiculous amount of trace statements until I could nail it down.
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