按总项数显示每个列表项的个数(计数

def count_items(lst):
    count_dict = {}
    for item in lst:
        if item in count_dict:
            count_dict[item] += 1
        else:
            count_dict[item] = 1
    return count_dict

# 示例列表
my_list = [1, 2, 3, 2, 1, 3, 4, 5, 4, 4, 4]

# 调用函数进行计数
result = count_items(my_list)

# 输出每个列表项的个数
for item, count in result.items():
    print(f"{item}: {count}")

1: 2
2: 2
3: 2
4: 4
5: 1