Returns a Boolean stating whether the set is contained in the specified set and that the sets are not equal.

set < other

other

A set object or expression evaluating to a set.

None

#TODO

>>> {1, 2} < {1, 2}
False
>>> {1, 2} < {1, 2, 3}
True
>>> {1, 2} < {'frob'}
False

#TODO