MRAB <python at mrabarnett.plus.com> writes: > No, but I would vote for {,}. −1. The comma in the set literal syntax is used to separate items, and so that looks like a set that explicitly *not* empty, but rather containing (unspecified) items. -- \ “Broken promises don't upset me. I just think, why did they | `\ believe me?” —Jack Handey | _o__) | Ben Finney