A check if Python's UUIDs are reasonably unique

uuids.py

import uuid

ids = set()

i = 0
MAX = 10 ** 7
while i < MAX:
    u = str(uuid.uuid4())
    if u in ids:
        print("{}: {} DUPLICATE".format(i, u))
        break
    ids.add(u)
    print("{}: {} OK".format(i, u))
    i += 1