Please. Use. set().
On Sat, Apr 10, 2021 at 02:03 Serhiy Storchaka <[email protected]> wrote:
> 09.04.21 19:08, micro codery пише:
> >
> > You can now use `{*()}` as a syntax for empty set.
> >
> > I saw that in the ast module and think it's clever, mainly in a good
> > way. I don't think it is the same as having dedicated syntax for the
> > empty set partly because I think it needs to be taught. I don't think a
> > new pythonista would turn to empty tuple unpacking to get the empty set,
> > where I do think that either set() or {,} would be natural, at least
> > after some trial and exceptions.
>
> Do you think that {,} does not need to be taught? It is a new special
> syntax which needs paragraphs in tutorial and language reference. In
> contrary, {*()} is a simple combination of already described syntax
> elements.
>
> > It also doesn't give quite the
> > optimization as {,}.
>
> It is a trivial optimization. It was not implemented yet only because
> such code is never used in tight loops, empty set creation is very rare
> operation at all. We prefer to keep the compiler simpler and focus on
> optimizing common operations which has significant effect.
>
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