Keep duplicates in a list in Python

Question

I know this is probably an easy answer but I can\'t figure it out. What is the best way in Python to keep the duplicates in a list:

x = [1,2,2,2,3,4,5,6,6,7         


        

Answer 1

keepin' it simple:

array2 = []
aux = 0
aux2=0
for i in x:
    aux2 = i
    if(aux2==aux):
        array2.append(i)
    aux= i
list(set(array2))

That should work