我有这样的代码：

lst = [['Descendant Without A Conscience','good','happy'],['Wolf Of The Solstice','30000','sad'],['Women Of Hope','-4000','neutral'],['Pirates Of Perfection','65467',['Warriors And Soldiers','-5435',['Butchers And Soldiers','76542',['World Of The Mountain','6536543',['Ruination Of Dusk','-2000',['Destroying The Stars','5435',['Blinded In My Enemies','765745.5',['Descendant Without A Conscience','happy']]

check_lst = list(set(lst))

for movie in lst:

   if len(movie) > 3:

       raise ValueError('Invalid input.')


   elif movie[2] != movie[2].lower():

       raise ValueError('Invalid input.')

   elif len(lst) != len(check_lst):
       raise ValueError('Invalid input.')

由于某种原因，我的check_lst无法正常工作，并且出现TypeError：无法散列的类型：'list'。我正在尝试从列表中删除重复项，并使我的check_lst没有重复项。 我想念什么？