Ned Batchelder - Machete-mode debugging: Hacking your way out of a tight spot - PyCon 2016

When chasing mysterious bugs, it's helpful to use all the tools at your disposal. We'll explore ways to use Python's dynamic tools to help track down the cause of head-scratching problems in large systems. Tools include the inspect module, monkey-patching, trace functions, and the Python mechanisms at work behind them all.