dcrosta/python-guide — comment on commit a21305bc9dc9058573bf7d1506b5e0a3fe44f315
File: docs/writing/style.rst line 33
By dcrosta:

Huh, will you look at that.

As far as `_` is concerned, I think it's safe to use if you're not using it for gettext (or similar). Unfortunately, there's no other non-letter character that's a valid Python identifier by itself. I guess I could recommend using any single character, which are probably not recommended as variable names anyway (except in the case of counters).