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Oct. 17, 2019
8:19 a.m.
Late to the game, I like the proposal a lot but have a couple of questions about it. Why the need for strictness of type for the operator? I get that it's analogous with the behavior for `list`, but I guess I'm also not sure why that should be strict. As a compromise in regard to strictness, what it anything that is a `Mapping` or has `.asdict()` could be added using the operator but only those kinds of thing? Also, why was subtraction dropped? It seems to me the ability to subtract an iterable of keys makes a lot of sense — or maybe that should be a separate PEP?