Lambert, David W (S&T) wrote:
Overly terse. I do mean that this is illegal:isinstance(s, {str, bytes}) tuples have order, immutability, and the possibility of repeat items. A set is most reasonable in a mathematical sense.
You could say the same about s.startswith(("a", "b")).
It might be because sets are a more recent addition to the language; if
they had been in Python from the start then maybe they would've been
used instead.
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