[zrobotics]

Eh, is there a point in memorizing it if you don't use it enough? The best way to learn something is repeated practice, so while I use regex enough to not need to look things up normally, I need a quick refresh anytime I need to do anything in matplotlib. There are people who are fluent with the library, but I don't have any more than basic syntax memorized since it's maybe once per year that I need it.

Although if you really do need to learn regex, I highly recommend https://regexone.com At least for me, the way it was taught Wes super-helpful in retaining the syntax knowledge.