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I don't know how to solve it
Non-unique Elementsdef checkio(data: list) -> list:
for i in data:
if data.count(i) == 1:
del data[data.index(i)]
return data
data = [1,2,3,4,5] result -> [2,4]
def checkio(data: list) -> list:
for i in data:
if data.count(i) == 1:
del data[data.index(i)]
return data
data = [1,2,3,4,5] result -> [2,4]
