potizo的博客

1.二叉树的封装class Node(object): """二叉树的节点封装""" def __init__(self,elem): self.elem = elem self.lchild = None self.rchild = None def __str__(self): return self.elemclass Tree(object): """二叉树封装""" def __init

1.单链表#定义单链表节点class llistNode(object): def __init__(self,elem): self.elem = elem self.next = None#把LinkedListUnderflow定义成标准异常类ValueError的子类，在空表访问元素等场合抛出该异常class LinkedListUnderflow(ValueError): pass#定义linklist类class linklist(