[issue35338] set union/intersection/difference could accept zero arguments

[SilentGhost]

SilentGhost <ghost.adh at runbox.com> added the comment:

You can write your code like this:

   set().union(*sequence)

as well as: a.union(b, c) if you already have a set object available.

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nosy: +SilentGhost
versions: +Python 3.8 -Python 3.7

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue35338>
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