On Sat, Dec 30, 2017 at 8:50 PM, Franklin? Lee < leewangzhong+pyt...@gmail.com> wrote: > > Paddy might want something like this: > - For existing APIs which take int or IntFlag flags, allow them to > also take a set (or perhaps any collection) of flags. > - In new APIs, take sets of Enum flags, and don't make them IntFlag. > - Documentation should show preference toward using sets of Enum > flags. Tutorials should pass sets.
I'm not keen on this recommendation. An argument that takes a Set[Foo] would mean that in order to specify: - no flags: you'd have to pass set() -- you can't use {} since that's an empty dict, not an empty set - one flag: you'd have to pass {Foo.BAR} rather than just Foo.BAR - two flags: you'd have to pass {Foo.BAR, Foo.BAZ} rather than Foo.BAR | Foo.BAZ I think for each of these the proposal would be strictly worse than the current convention. -- --Guido van Rossum (python.org/~guido)
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