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First solution in Clear category for Non-unique Elements by tony-aycc
#Your optional code here
#You can import some modules or create additional functions
def checkio(data: list) -> list:
#Your code here
#It's main function. Don't remove this function
#It's used for auto-testing and must return a result for check.
non_unique = []
for i in data:
if data.count(i) >1:
non_unique.append(i)
return non_unique
print(list(checkio([1, 2, 3, 1, 3])))
print(list(checkio([1, 2, 3, 4, 5])))
print(list(checkio([5, 5, 5, 5, 5])))
print(list(checkio([10, 9, 10, 10, 9, 8])))
Feb. 4, 2020
