On Sun, Mar 22, 2020 at 6:51 PM Steven D'Aprano <steve@pearwood.info> wrote:
We might have a terminology issue here, since according to Wikipedia
there is some dispute over whether or not to include the equality case
in subset/superset:


For what it is worth, I'm in the school that subset implies proper subset

Wikipedia's pedantry notwithstanding, I don't think this is a useful position *when talking about Python sets*, since Python's set's .issubset() method returns True when the argument is the same set:

>>> {1}.issubset({1})

Or did I miss a wink?

--Guido van Rossum (python.org/~guido)