Are Python sets mutable

Question

x = set([11, 12, 13])
y = x

y |= set([14, 15, 16])

Are x and y still pointing to the same object, or was a new set created and assigned to y?

Answer 1

Python sets are data structures which are used to store values.
Sets are unique in the sense that they will not hold duplicate values, also sets are unordered.
There are frozen class of sets which are immutable and also a class exists where sets can be changed.

An Example:

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

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

y

Output

{1, 2, 3, 4, 5, 6}

x

Output

{1, 2, 3, 4, 5, 6}

Both x and y are set and are same.