Remove Duplicates from Sorted List

Problem

Remove duplicates from a sorted list so that each value appears exactly once.

Because the list is sorted, duplicates are adjacent. Scan once and keep a value only when it differs from the last kept value.

Return the resulting list.

Hint

Compare each value with the last one you kept, not with the previous element alone.

case 1

in: [[1,1,2]]

expected: [1,2]

case 2

in: [[1,1,2,3,3]]

expected: [1,2,3]

case 3

in: [[]]

expected: []

case 4

in: [[-3,-1,-1,0,0,2]]

expected: [-3,-1,0,2]

Starter codePython

def remove_duplicates(values):
    # Your code here
    pass

4 test cases · run your code against them in the editor