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

[T. M.]

Same

On Thursday, October 29, 2020, Manprit Singh <manpritsinghece at gmail.com>
wrote:

> Dear sir ,
>
> Consider explanation given about  set < other in python official
> documentation
>
> Test whether the set is a proper subset of *other*, that is, set <= other
> and set != other.
>
> This confuses me actually.
>
> set <= other   and set != other , how it is possible at same time ?
>
> As far as i know, if S is a set and ss is its proper subset, then ss is
> strictly contained in S and necessarily excludes at least one member of S.
>
> Need some light on it.
>
> Regards
> Manprit Singh
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