Python 3 isinstance

MRAB google at
Wed Jan 14 23:24:23 CET 2009

Lambert, David W (S&T) wrote:
> Please, why isn't a set permitted as the second argument to
> isinstance?
Do you mean set as a class ("isinstance(s, set)", which is valid) or a
set of classes ("isinstance(s, set([str, bytes])", which isn't valid)?

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