Richard Damon schreef op 23/05/2020 om 20:57:
On 5/23/20 2:21 PM, Ralf M. wrote:
Hello,
recently I wrote a small library that uses an Enum. That worked as
expected. Then I added a main() and if __name__ == "__main__" to make
it runable as script. Now Enum members that should be the same aren't
identical any more, there seem to be two instances of the same Enum.
I think I know what's going on, but cannot find a good and elegant way
to avoid the problem. I hope someone here can help me there.
I don;'t think Python anywhere defines that a enum will be a singleton,
and you should be checking for equality (==) not identity (is)
So much this. Always check for equality instead of identity, unless you
know what you're doing and you have a very good reason to use identity.
Everywhere I see questions all the time from people new to Python,
confused about stuff that happens when comparing using identity. I would
like to know where that comes from ... are there tutorials that
encourage using identity checks?
--
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-- Franklin P. Jones
Roel Schroeven
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