如何使用Python将列表传递给函数，然后分别对项的出现次数进行排序和计数？

def count_and_sort(lst):

    from collections import Counter
    count_dict = Counter(lst)

    sorted_items = sorted(count_dict.items(), key=lambda x: x[1], reverse=True)
    return sorted_items

from collections import Counter

def count_and_sort(lst):
    count_dict = Counter(lst)
    sorted_items = sorted(count_dict.items(), key=lambda x: x[1], reverse=True)
    return sorted_items

my_list = [1, 2, 3, 2, 1, 3, 4, 5, 1]
result = count_and_sort(my_list)
print(result)

[(1, 3), (2, 2), (3, 2), (4, 1), (5, 1)]