计数元素在嵌套列表中出现

def count_nested_list(nested_list, target):
    count = 0
    for item in nested_list:
        if isinstance(item, list):
            count += count_nested_list(item, target)
        elif item == target:
            count += 1
    return count

nested_list = [1, 2, [3, 4, [5, 6, 7], 8], 9, [10, [11, 12, [13, 14]]]]
target = 3

count = count_nested_list(nested_list, target)
print(f"{target} 在嵌套列表中出现了 {count} 次")