Possibly worth noting that the presentation there is a few years old now and appears to be using Python 2 for the examples, so some of the code wouldn’t be exac

Possibly worth noting that the presentation there is a few years old now and appears to be using Python 2 for the examples, so some of the code wouldn’t be exactly the same in Python 3 even if the ideas still make sense. With that caveat, watching almost anything that Raymond Hettinger presents is positively correlated with improving programmer skill.