For those, like me, who get excited by this note that there are restrictions on the Unicode categories that are allowed, see the supported characters¹ and gory details². It is often enough to write math-y code in a usable way, but occasionally you'll find you can't use the character you want.

¹ https://docs.python.org/3/reference/lexical_analysis.html#id...

² https://www.python.org/dev/peps/pep-3131/