Set performance test (less than 10 seconds on my Mac)

gistfile1.txt

from uuid import uuid4
s = set()
for i in range (500000):
    s.add(str(uuid4()))

count = 0
for uu in s:
  if uu in s:
     count += 1

print(count)
if "other_string" not in s:
    print("this is normal")

This generates a set of 500 000 random strings and then test if each one is in the set. It takes less than 10 seconds on my Mac