用python写个单链表且用头插法将一个列表a=[11，22，33，44，55]建一个表

class Node:
    def __init__(self, data=None):
        self.data = data
        self.next = None

class LinkedList:
    def __init__(self):
        self.head = None

    def add_at_beginning(self, data):
        new_node = Node(data)
        new_node.next = self.head
        self.head = new_node

    def print_list(self):
        current_node = self.head
        while current_node:
            print(current_node.data)
            current_node = current_node.next

a = [11, 22, 33, 44, 55]
linked_list = LinkedList()
for i in a:
    linked_list.add_at_beginning(i)

linked_list.print_list()

输出：

55
44
33
22
11