I keep getting this message
"Oops, try again. remove_duplicates([4, 5, 5, 4]) returned  instead of [4, 5]"
def remove_duplicates(Input): Output_list =  for X in Input: if X not in Output_list: Output_list.append(X) print X return Output_list
It is as if the loop only runs once. I have thought of 'for x in range()' but that is only for numbers.
I'm really stuck..