Python - What does {1|2}|{1}|{2} mean?

Question

zzz = {1|2}|{1}|{2}
print(zzz)

How did we get {1,2,3} as the output?

Answer 1

1|2 = 3

bitwise or |
01
10
--------
11

The union operator | combines two sets to form a new one containing items in either.
{3} | {1, 2} = {1, 2, 3}

https://www.sololearn.com/learn/4073/?ref=app