PEP 802: Display Syntax for the Empty Set

[Rosuav (Chris Angelico)]

@aubreym

Pairing it with {:} for dicts elegantly resolves this inconsistency, while also improving the clarity of Python’s syntax. The legacy empty dictionary definition syntax ({}) would hang around for backwards compatibility reasons, but in my opinion your proposed alternate syntax should eventually become the recommended syntax after sufficiently many releases, if it were included in a future language revision.

The question would then become: Why should lists and tuples be written simply as [] and (), but dictionaries have to be {:}? It doesn’t remove the inconsistency, it only shifts it.