old_list = ['cc', 222, 111, 'bb', 'cc', 'aaa', 'sss', 'bb', 'cc', 'aaa', 'zzz', 'sss', 111] new_list = sorted(set(old_list), key=old_list.index) print(new_list) # ['cc', 222, 111, 'bb', 'aaa', 'sss', 'zzz']