Support selecting and ignoring groups of codes

[andersk]

Flake8 supports options like

• flake8 --ignore=E (ignore all E??? rules)
• flake8 --select=E5 (enable all E5?? rules)
• flake8 --select=E,E50 --ignore=E5,E501 (select all E??? rules, except E5?? which are ignored, except E50? which are selected, except E501 which is ignored)

It might be nice to support this or something similar.

[charliermarsh]

Yeah that's nice. If implemented, we should try to retain the strict-checking nature of the CLI (such that we error if you provide --ignore=G, and no codes match G???).

[charliermarsh]

I'm also wondering if there are other linters (even from other ecosystems) that do something more intuitive or ergonomic than the prefix-based selection.