On Mon, Aug 10, 2020 at 12:20:49PM +0100, haael wrote:
>
> Forgive me if this has already been discussed.
>
>
> Could we add the idea of "negative" sets to Python? That means sets that
> contain EVERYTHING EXCEPT certain elements.
Can you give an example of what you would use this for? A use-case.
It seems to me that the easiest way to use this would be to use invert
the meaning of your universal set. Instead of:
unprocessed = set.UNIVERSAL
for element in universe():
if element in unprocessed:
process(element)
unprocessed.remove(element)
do it like this:
processed = set()
for element in universe():
if element not in processed:
process(element)
processed.add(element)
If you have a different use-case to this, I don't know what it would be.
--
Steven
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