[Tutor] Confusion about definition of proper subset in python set

[Cameron Simpson]

On 30Oct2020 17:14, boB Stepp <robertvstepp at gmail.com> wrote:
>I think that he is referring to:
>
>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>issubset(other)
>set <= other
>Test whether every element in the set is in other.
>
>set < other
>Test whether the set is a proper subset of other, that is, set <= other 
>and set != other.

Hmm, yes. It is even the text he cites.

Manprit, the second definition says that the two conditions hold ("<= 
and !="). It does not imply that it is possible for these two conditions 
to hold: "= and !=". They didn't write "< and !=" because "<" is what 
that entry is defining.

Cheers,
Cameron Simpson <cs at cskk.id.au>