打印我重复打印两次，有什么方法只打印一次

Question

This is my code

tup = (1,2,3,4,5,6,6)
for i in tup:
    if (tup.count(i)<1):
        print(i)

And it's output is

6
6

But i want it's output should only prints once. What logic do I need to add and why it's printing twice?

Answer 1

import collections
print([item for item, count in collections.Counter(tup).items() if count > 1])

in this case it is printing twice, because it is iterating every element in your TUP and there are two 6 es, and 6 is more than 1