task Non-unique Elements help
def checkio(data: list) -> list: for i in data: if data.count(i)==1: data.remove(i) return data when run the code above, 2nd example can not pass, but other exapmles are ok. I don't kown why. please help !
task.non-unique-elementsCreated: March 5, 2020, 9:42 a.m.
Updated: March 6, 2020, 9:47 a.m.
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