input: def deleteDuplicates(list: list) -> list: 
      """Delete all duplicates in a given list of numbers.
      >>> deleteDuplicates([1, 2, 2, 3, 4, 4])
      [1, 2, 3, 4]
      >>> deleteDuplicates([5, 5, 5, 5])
      [5]
      """
      final_list = [] 
      for num in list: 
          if num not in final_list: 
              final_list.append(num) 
      return final_list
output:     final_list = [] 
      for num in list: 
          if num not in final_list: 
              final_list.append(num) 
      return final_list