Are Python sets mutable?

Question

Are sets in Python mutable?

---

In other words, if I do this:

x = set([1, 2, 3])
y = x

y |= set([4, 5, 6])

Are x and

Answer 1

Sets are muttable

s = {2,3,4,5,6}
type(s)

s.add(9)
s
{2, 3, 4, 5, 6, 9}

We are able to change elements of set