Antoine Pitrou firstname.lastname@example.org added the comment:
If there are a few of these idioms, I'm not against adding a new section to PEP 7 (something like the "Programming Recommendations" section in the PEP 8). It's just not worth doing it for the "*p++ = x;" idiom alone IMHO.
If these are recommandations, perhaps we should put them in the devguide instead?
But I agree that it's not worth doing it only for "*p++" anyway.