#!/usr/bin/python3
#建立链表类和遍历此链表
class Node(): def init(self,data=None): self.data=data self.next=None
class LinkedList(): def init(self): self.head=None
def printList(self): ptr=self.head while ptr: print(ptr.data) ptr=ptr.next 1 2 3 4 5 link=LinkedList() link.head=Node(5) n2=Node(15) n3=Node(25) link.head.next=n2 n2.next=n3 link.printList()