如何在自定义链表实现中找到最常见的元素？

def find_most_common_element(head):
    count_dict = {}
    current = head

    # 遍历链表，统计元素出现次数
    while current is not None:
        if current.value not in count_dict:
            count_dict[current.value] = 1
        else:
            count_dict[current.value] += 1
        current = current.next

    most_common_element = None
    max_count = 0

    # 找到出现次数最多的元素
    for key, value in count_dict.items():
        if value > max_count:
            most_common_element = key
            max_count = value

    return most_common_element