How to join two sets in one line without using “|”

Question

Assume that S and T are assigned sets. Without using the join operator |, how can I find the union of the two sets? This, for example,

Answer 1

If by join you mean union, try this:

set(list(s) + list(t))

It's a bit of a hack, but I can't think of a better one liner to do it.