PEP-8 still says 79 chars IIRC, but at this point that's honoured more in the breach than the observance.
With modern screens and editors, >80 isn't really a problem for most. Black defaults to 88; I happen to like 96. A company I work for has standardized on 120, which IMHO is too wide.
Pick something you like, configure black/your editor/etc to observe it, and be consistent, and you'll be fine.