Python实现针对给定单链表删除指定节点的方法

#!usr/bin/env python#encoding:utf-8'''''__Author__:沂水寒城功能：给定一个单链表删除指定节点'''class Node(object):  '''''  节点类  '''  def __init__(self,data):    self.num=data    self.next=Noneclass DeleteNode():  '''''  实现删除指定节点功能  '''  def delete_node(self,node):    node.num=node.next.num    node.next=node.next.nextclass PrintNode():  '''''  输出指定节点为起始节点的链表  '''  def print_node(self,node):    res_list=[]    while node:      res_list.append(str(node.num))      node=node.next    print '->'.join(res_list)if __name__ == '__main__':  node1=Node(90)  node2=Node(34)  node3=Node(89)  node4=Node(77)  node5=Node(23)  node1.next=node2  node2.next=node3  node3.next=node4  node4.next=node5  print 'init single linknode is:'  printnode=PrintNode()  printnode.print_node(node1)  delete=DeleteNode()  delete.delete_node(node4)  print 'after delete node,the single linknode is:'  printnode.print_node(node1)