On 2019-05-09 17:43, Petr Viktorin wrote:
I don't see the reason for them to be exact. The reason we need tuples/dicts (and not any sequence/mapping) is we access the structs directly, but that will work with subtypes.
Fair enough, that's reasonable. I'll use the _Check() variants instead of _CheckExact() in the PEP 590 implementation.