python3 链表

code

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, nextNode):
        self.next = nextNode


temp = Node(93)
temp.setData(10)
print(temp.getData())

# 定义一个无序链表
class UnorderedList:
    def __init__(self):
        self.head = None

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

    def add(self, item):
        #添加在前面
        temp = Node(item)
        temp.setNext(self.head)
        self.head = temp

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

    def search(self, item):
        current = self.head
        found = False
        while current != None and not found:
            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:
            #移除第一个元素
            self.head = current.getNext()
        else:
            #移除元素,跳过当前元素
            previous.setNext(current.getNext())

    def show(self):
        current = self.head
        while current != None:
            print(current.getData(),end="->")
            current=current.getNext()
        print("
")
            



myList = UnorderedList()
myList.add(31)
myList.add(77)
myList.add(17)
myList.add(93)
myList.add(26)
myList.add(54)
print(myList.search(17))
myList.show()
myList.remove(54)
print(myList.search(54))
myList.show()

 outputs

macname@MacdeMBP ~ % python3 test.py
10
True
54->26->93->17->77->31->

False
26->93->17->77->31->

macname@MacdeMBP ~ %