python实现链表增删

class Node:#定义一个节点    def __init__(self,initdata):        self.data=initdata        self.next=Noneclass MyList:    def __init__(self):        self.head=None  #初始化链表头    def isEmpty(self):        return self.head==None    def add(self,numdata):        node=Node(numdata)        node.next=self.head        self.head=node    def remove(self,numdata):            cur = mylist.head            if cur==None:#判断是否为空               return            if cur.data==numdata:#要删的为头结点                self.head=cur.next                return            while cur.next!=None and cur.next.data!=numdata:                cur=cur.next            if cur.next.next==None and  cur.next.data==numdata:#要删的为尾节点                cur.next=None                return            if cur.next==None:#没有找到要删的节点                return            temp=cur.next            cur.next=temp.next            temp=Nonemylist=MyList()mylist.add(88)mylist.add(1)mylist.add(11)mylist.add(25)mylist.add(4)mylist.add(7)print("head:" ,mylist.head.data)mylist.remove(88)cur=mylist.headwhile True:    print(cur.data)    if  cur.next==None:        break    cur = cur.next