python-数据结构代码 链表（无序链表、有序链表）

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

    def getData(self):
        return self.data

    def getNext(self):
        return self.next

    def setData(self,newdata):
        self.data = newdata

    def setNext(self,newnext):
        self.next = newnext

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

    def isEmpty(self):
        return self.head == None

    def add(self,item):
        temp = Node(item)
        temp.setNext(self.head)
        self.head = temp
    
    def size(self):
        current = self.head
        count=0
        while current != None:
            count=count+1
            current=current.getNext()
        return count
    
    def search(self,item):
        current=self.head
        found=False
        while current!-None and not foune:
            if current.getData() == item:
                found=True
            else:
                current=current.getNext()
        return found

    def remove(self,item):
        current=self.head
        previous=None
        found=False
        while not found:
            if current.getData()==item:
                found=True
            else:
                previous=current
                current=current.getNext()
        if previous==None:
            self.head=current.getNext()
        else:
            previous.setNext(current.getNext())

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

    def isEmpty(self):
        return self.head == None
    
    def size(self):
        current = self.head
        count=0
        while current != None:
            count=count+1
            current=current.getNext()
        return count

    def remove(self,item):
        current=self.head
        previous=None
        found=False
        while not found:
            if current.getData()==item:
                found=True
            else:
                previous=current
                current=current.getNext()
        if previous==None:
            self.head=current.getNext()
        else:
            previous.setNext(current.getNext())

    def search(self,item):
        current=self.head
        found=False
        stop=False
        while current!=None and not found and not stop:
            if current.getData()==item:
                found=True
            else:
                if current.getData()>item:
                    stop=True
                else:
                    current=current.getNext()
        return found

    def add(self,item):
        current=self.head
        previous=None
        stop=False
        while current!=None and not stop:
            if current.getData()>item:
                stop=True
            else:
                previous=current
                current=current.getNext()
        temp=Node(item)
        if previous==None:
            temp.setNext(self.head)
            self.head=temp
        else:
            temp.setNext(current)
            previous.setNext(temp)