仅按地址删除节点，但也会删除其他值，以及如何防止内存泄漏

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

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

    def deleteNode(self, node):
        if self.head is None or node is None:
            return

        # 如果要删除的节点是头节点
        if self.head == node:
            self.head = node.next
            node = None
            return

        # 找到要删除的节点的前一个节点
        prev = self.head
        while prev.next != None and prev.next != node:
            prev = prev.next

        # 如果找到了要删除的节点
        if prev.next == node:
            prev.next = node.next
            node = None

    def printList(self):
        temp = self.head
        while temp:
            print(temp.data, end=" ")
            temp = temp.next

# 创建链表
llist = LinkedList()
llist.head = Node(1)
second = Node(2)
third = Node(3)

llist.head.next = second
second.next = third

# 删除节点2
llist.deleteNode(second)

# 打印链表
llist.printList()