Question

How do I add values to an existing set?

Answer 1

your_set.update(your_sequence_of_values)

e.g, your_set.update([1, 2, 3, 4]). Or, if you have to produce the values in a loop for some other reason,

for value in ...:
    your_set.add(value)

But, of course, doing it in bulk with a single .update call is faster and handier, when otherwise feasible.