如何显示数组元素出现的次数

def count_elements(arr):
    count_dict = {}
    for elem in arr:
        if elem not in count_dict:
            count_dict[elem] = 1
        else:
            count_dict[elem] += 1
    return count_dict

arr = [1, 2, 3, 2, 1, 3, 1, 1, 2, 3, 3, 3]
count_dict = count_elements(arr)
for elem, count in count_dict.items():
    print(f"{elem}出现了{count}次")

1出现了4次
2出现了3次
3出现了5次