code: def obj_in_list_always(target_list, obj):
      
      for item in set(target_list):
          if item is not obj:
              return False
      return True
docs: >>> l = [1,1,1]
      >>> obj_in_list_always(l, 1)
      True
      >>> l.append(2)
      >>> obj_in_list_always(l, 1)
      False