text: list1 = [5, 8, 12, 6, 8, 6]
  list1.sort(reverse=True)
  print(list1)
  
  ########################################
  # 1. Now tuple1 can not write
  tuple1 = tuple(list1)
  print(tuple1)
  
  ########################################
  # 1. Now set1 can not contain duplicate
  set1 = set(list1)
  print(set1)
  
  ########################################
  # 1. Can be chain
  items = tuple(set(list1))
  print(items)
  
  tuple2 = {1, 2, 3, 4, 5}
  
  ########################################
  # 1. list2 can be changed
  list2 = list(tuple2)
  print(list2)
  
  set2 = {1, 2, 3, 4, 5}
  ########################################
  # 1. list3 can be used by indexer
  # 2. Data only can be unique
  list3 = list(set2)
  
  ########################################
  # 1. tuple3 can be used by indexer
  tuple3 = tuple(set2)