input: Write a python function to find distinct values from a list.
  assert distinct_values([1, 2, 2, 3, 4, 4, 5])==[1, 2, 3, 4, 5]
  assert distinct_values([10, 20, 20, 30, 40, 40, 50])==[10, 20, 30, 40, 50]
  assert distinct_values([5, 5, 5, 7, 9, 9, 6, 6])==[5, 7, 9, 6]
output: def distinct_values(lst):
      return list(set(lst))