祖先结点不应该是他上层的所有结点吗，不包括上层节点的兄弟结点吗

请问老师，bug在哪儿啊？我真的没找出来

密码不知道是啥呀

老师问题如图所示，主要是关于对数函数的，还有还是之前那个。一塔为啥等于

老师，这里为什么要建两个类呀，一定要建吗

为什么我的客户端运行不出来啊

#coding=utf-8
from socket import *
from threading import Thread
def recv_data():
    while True:
        # 接收服务端数据
        recv_data = client_socket.recv(1024)
        print(f"服务器端说：{recv_data.decode('gbk')}")
def send_data():
    while True:
        msg = input(">")
        client_socket.send(msg.encode("gbk"))
        if msg == "end":
            break
if __name__ == '__main__':
    client_socket=socket(AF_INET,SOCK_STREAM)
    client_socket.connect(("127.0.0.1",8899))
    t1=Thread(target=recv_data())
    t2=Thread(target=send_data())
    t1.start()
    t2.start()
    t1.join()
    t2.join()
    client_socket.close()

为何需要把StateHoliday的属性改为字符创呢

from urllib.request import Request, urlopen
from urllib.parse import quote


def get_html(ur1):
    headers = {
        "User_agent":"Mozilla/4.0(compatible;MSIE7.0;WindowsNT5.1;TheWorld)"
    }
    request = Request(ur1, headers = headers)
    response = urlopen(request)
    return response.read().decode()


def save_html(html,filename):
    with open(filename, 'w', encoding='utf-8') as f:
        f.write(html)


def main():
    ur1 = 'https://tieba.baidu.com/f/search/res?ie=utf-8&qw=%E5%88%BA%E5%AE%A2%E4%BF%A1%E6%9D%A1&red_tag=3423937163'
    html = get_html(ur1)
    save_html(html, filename)


if __name__ == '__main__':
    main()

老师这个怎么解决呢

两个\\为什么输出之后变成一个\了，aabb\\cc→aabb\cc?

请问为什么要采用EeasyUi这种后台管理框架，我看网上很少有用这个框架。

请问老师怎么才能获得Ajax返回的属性值（列表），我想要将这些属性放到另一张表里该怎么实现。

老师，视频里在讲System类下的out变量有这句话：“成员变量out是PrintStream类型的”。 能不能解释一下是什么意思吗？

问题：已经写了while True循环为什么界面依然闪退？

报错：AttributeError: module 'pygame.display' has no attribute 'get'

代码：

"""
新增功能：
左上角文字的绘制：
左上角输出敌方坦克的数量
"""
# 导入pygame模块
import pygame

SCREEN_WIDTH = 700
SCREEN_HEIGHT = 500
BG_COLOR=pygame.Color(0, 0, 0)

# 主类
class MainGame():
    window = None
    def __init__(self):
        pass

    # 开始游戏
    def startGanme(self):
        # 加载主窗口
        # 初始化窗口
        pygame.display.init()
        # 设置窗口的大小和显示
        MainGame.window = pygame.display.set_mode([SCREEN_WIDTH, SCREEN_HEIGHT])
        # 设置窗口的标题
        pygame.display.set_caption("坦克大战游戏测试1.03")
        # 循环窗口常亮
        while True:
            # 给窗口设置一个填充色
            MainGame.window.fill(BG_COLOR)
            # 获取事件
            self.getEvent()
            pygame.display.update()

    # 结束游戏
    def endGanme(self):
        print("谢谢，欢迎再次使用")
        exit()

    # 左上角文字的绘制
    def getTextSufce(self):

        # 字体初始化模块
        pygame.font.init()
        # 查看所有的字体名称
        print(pygame.font.get_fonts())
        # 获取字体Font对象
        font = pygame.font.SysFont("黑体", 18)

    def getEvent(self):
        # 获取所有事件
        eventList = pygame.display.get()
        # 遍历事件
        for event in eventList:
            # 判断按下的键是关闭还是键盘按下
            # 如果按的是退出，关闭窗口
            if event.type == pygame.QUIT:
                self.endGanme()
            # 如果是键盘按下
            if event.type == pygame.KEYDOWN:
                # 判断按下的是上、下
                if event.key == pygame. K_LEFT:
                    print("按下左键坦克向左移动")
                elif event.key == pygame.K_RIGHT:
                    print("按下右键坦克向右移动")
                elif event.key == pygame.K_UP:
                    print("按下上键坦克向上移动")
                elif event.key == pygame.K_DOWN:
                    print("按下下键坦克向下移动")





class Tank():
    def __init__(self):
        pass

    # 移动
    def move(self):
        pass

    # 射击
    def shot(self):
        pass

    # 展示坦克的方法
    def displayTank(self):
        pass
# 我方坦克
class MyTank(Tank):
    def __init__(self):
        pass

# 敌方坦克
class EnemyTank(Tank):
    def __init__(self):
        pass

# 子弹类
class Bullet():
    def __init__(self):
        pass

    # 移动
    def move(self):
        pass

    # 展示子弹方法
    def displayBullet(self):
        pass

# 墙壁类
class Wall():
    def __init__(self):
        pass

    # 展示墙壁的方法
    def displayWall(self):
        pass

# 爆炸类
class Explode():
    def __init__(self):
        pass

    # 展示爆炸效果的方法
    def displayExplode(self):
        pass

# 音效类
class Music():
    def __init__(self):
        pass

    # 播放音乐的方法
    def play(self):
        pass

if __name__ == "__main__":
    MainGame().startGanme()

pygame

SCREEN_WIDTH = SCREEN_HEIGHT = BG_COLOR=pygame.Color()

MainGame():
    window = ():
        ():
        pygame.display.init()
        MainGame.window = pygame.display.set_mode([SCREEN_WIDTHSCREEN_HEIGHT])
        pygame.display.set_caption()
        :
            MainGame.window.fill(BG_COLOR)
            .getEvent()
            pygame.display.update()

    ():
        ()
        ()

    ():

        pygame.font.init()
        (pygame.font.get_fonts())
        = pygame.font.SysFont()

    ():
        eventList = pygame.display.get()
        event eventList:
            event.type == pygame.QUIT:
                .endGanme()
            event.type == pygame.KEYDOWN:
                event.key == pygame. K_LEFT:
                    ()
                event.key == pygame.K_RIGHT:
                    ()
                event.key == pygame.K_UP:
                    ()
                event.key == pygame.K_DOWN:
                    ()





Tank():
    ():
        ():
        ():
        ():
        MyTank(Tank):
    ():
        EnemyTank(Tank):
    ():
        Bullet():
    ():
        ():
        ():
        Wall():
    ():
        ():
        Explode():
    ():
        ():
        Music():
    ():
        ():
        __name__ == :
    MainGame().startGanme()

老师，我坦克按方向键不移动了是咋回事

pygametimerandom
pygame.sprite Sprite
SCREEN_WIDTH=SCREEN_HEIGHT=BG_COLOR=pygame.Color()
TEXT_COLOR=pygame.Color()

BaseItem(Sprite):
    ():
        pygame.sprite.Sprite.()

MainGame():
    window=my_tank=enemyTankList=[]
    enemyTankCount=myBulletList=[]
    enemyBulletList=[]
    explodeList=[]
    ():
        ():
        pygame.display.init()
        MainGame.window=pygame.display.set_mode([SCREEN_WIDTHSCREEN_HEIGHT])
        MainGame.my_tank=Tank()
        .createEnemyTank()
        pygame.display.set_caption()
        :
            time.sleep()
            MainGame.window.fill(BG_COLOR)
            .getEvent()
            MainGame.window.blit(.getTextSuface(%(MainGame.enemyTankList))())
            MainGame.my_tank MainGame.my_tank.live:
                MainGame.my_tank.displayTank()
            :
                MainGame.my_tank
                MainGame.my_tank=MainGame.my_tank.displayTank()
            .blitEnemyTank()
            .blitMyBullet()
            .blitEnemyBullet()
            .blitExplode()

            MainGame.my_tank MainGame.my_tank.live:
                MainGame.my_tank.stop:
                    MainGame.my_tank.move()
            pygame.display.update()

    ():
        top=i (MainGame.enemyTankCount):
            left=random.randint()
            speed=random.randint()
            enemy=EnemyTank(lefttopspeed)
            MainGame.enemyTankList.append(enemy)

    ():
        explode MainGame.explodeList:
                explode.live:
                    explode.displayExplode()
            :
                    MainGame.explodeList.remove(explode)


    ():
        enemyTank MainGame.enemyTankList:
            enemyTank.live:
                enemyTank.displayTank()
                enemyTank.randMove()
                enemyBullet = enemyTank.shot()
                enemyBullet:
                    MainGame.enemyBulletList.append(enemyBullet)
            :  MainGame.enemyTankList.remove(enemyTank)
    ():
        myBullet MainGame.myBulletList:
            myBullet.live:
                myBullet.displayBullet()
                myBullet.move()
            myBullet.myBullet_hit_enemyTank()
            :
                MainGame.myBulletList.remove(myBullet)

    ():
        enemyBullet MainGame.enemyBulletList:
            enemyBullet.live: enemyBullet.displayBullet()
                enemyBullet.move()
                enemyBullet.enemyBullet_hit_myTank()
            :
                MainGame.enemyBulletList.remove(enemyBullet)


    ():
        ()
        ()
    (text):
        pygame.font.init()
        font=pygame.font.SysFont()
        textSurface=font.render(textTEXT_COLOR)
        textSurface
    ():
        eventList= pygame.event.get()
        event eventList:
            event.type == pygame.QUIT:
                .endGame()
            event.type == pygame.KEYDOWN:
                event.key == pygame.K_LEFT:
                    MainGame.my_tank.direction=MainGame.my_tank.stop=()
                event.key == pygame.K_RIGHT:
                    MainGame.my_tank.direction=MainGame.my_tank.stop=()
                event.key == pygame.K_UP:
                    MainGame.my_tank.direction=MainGame.my_tank.stop=()
                event.key == pygame.K_DOWN:
                    MainGame.my_tank.direction=MainGame.my_tank.stop=()
                event.key == pygame.K_SPACE:
                    ()
                    (MainGame.myBulletList)<:
                        myBullet = Bullet(MainGame.my_tank)
                        MainGame.myBulletList.append(myBullet)



            event.type == pygame.KEYUP:
                event.key==pygame.K_UP event.key==pygame.K_DOWN event.key == pygame.K_LEFT event.key ==pygame.K_RIGHT:
                    MainGame.my_tank.stop = Tank(BaseItem):
    (lefttop):
        .images={
            :pygame.image.load():pygame.image.load():pygame.image.load():pygame.image.load()}
        .direction=.image=.images[.direction]
        .rect=.image.get_rect()
        .rect.left=left
        .rect.top=top
        .speed=.stop=.live=():
        .direction == :
            .rect.left>:
                .rect.left -= .speed
        .direction == :
            .rect.top>:
                .rect.top -= .speed
        .direction == :
            .rect.top+.rect.height<SCREEN_HEIGHT:
                .rect.top += .speed
        .direction == :
            .rect.left+.rect.height<SCREEN_WIDTH:
                .rect.left += .speed

    ():
        Bullet()
    ():
        .image=.images[.direction]
        MainGame.window.blit(.image.rect)
MyTank(Tank):
    ():
        EnemyTank(Tank):
    (lefttopspeed):
        (EnemyTank).(lefttop)
        .images={
            :pygame.image.load():pygame.image.load():pygame.image.load():pygame.image.load()
        }
        .direction=.randDirection()
        .image=.images[.direction]
        .rect=.image.get_rect()
        .rect.left=left
        .rect.top=top
        .speed=speed
        .flag=.step=():
        num=random.randint()
        num == :
            num == :
            num == :
            num == :
            ():
        .step<=:
            .direction=.randDirection()
            .step=:
            .move()
            .step-=():
        num=random.randint()
        num<:
            Bullet()
Bullet(BaseItem):
    (tank):
        .image=pygame.image.load()
        .direction=tank.direction
        .rect=.image.get_rect()
        .direction == :
            .rect.left = tank.rect.left + tank.rect.width / - .rect.width / .rect.top = tank.rect.top - .rect.height
        .direction == :
            .rect.left = tank.rect.left + tank.rect.width / - .rect.width / .rect.top = tank.rect.top + tank.rect.height
        .direction == :
            .rect.left = tank.rect.left - .rect.width / - .rect.width / .rect.top = tank.rect.top + tank.rect.width / - .rect.width / .direction == :
            .rect.left = tank.rect.left + tank.rect.width
            .rect.top = tank.rect.top + tank.rect.width / - .rect.width / .speed=.live=():
        .direction == :
            .rect.top>:
                .rect.top-=.speed
            :
                .live=.direction == :
            .rect.left+.rect.width<SCREEN_WIDTH:
                .rect.left+=.speed
            :
                .live=.direction ==:
            .rect.top+.rect.height<SCREEN_HEIGHT:
                .rect.top+=.speed
            :
                .live=.direction == :
            .rect.left>:
                .rect.left-=.speed
            :
                .live=():
        MainGame.window.blit(.image.rect)

    ():
        enemyTank MainGame.enemyTankList:
            pygame.sprite.collide_rect(enemyTank):
                enemyTank.live=.live=explode = Explode(enemyTank)
            MainGame.explodeList.append(explode)
    ():
        MainGame.my_tank MainGame.my_tank.live:
            pygame.sprite.collide_rect(MainGame.my_tank):
                explode=Explode(MainGame.my_tank)
                MainGame.explodeList.append(explode)
                .live=MainGame.my_tank.live=Wall():
    ():
        ():
        Explode():
    (tank):
        .rect = tank.rect
        .images = [
            pygame.image.load()pygame.image.load()pygame.image.load()pygame.image.load()pygame.image.load()]
        .step = .image = .images[.step]
        .live = ():
        .step < (.images):
            .image = .images[.step]
            .step += MainGame.window.blit(.image.rect)
        :
            .live = .step = Music():
    ():
        ():
        __name__==:
    MainGame().startGame()

老师，为什么这里提示错误没有这个writerow()方法呀