老师我想问下那两句代码是什么意义

import re
a=r'[1-9]\b{4,9}@qq.com$'
s='1258044@qq.com'
v=re.match(a,s)
print(v)

Traceback (most recent call last):

  File "E:/PycharmProjects/百战1/生成器和装饰器/正则表达式/re——match.py", line 30, in <module>

    v=re.match(a,s)

  File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\re.py", line 173, in match

    return _compile(pattern, flags).match(string)

  File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\re.py", line 286, in _compile

    p = sre_compile.compile(pattern, flags)

  File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\sre_compile.py", line 764, in compile

    p = sre_parse.parse(p, flags)

  File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\sre_parse.py", line 924, in parse

    p = _parse_sub(source, pattern, flags & SRE_FLAG_VERBOSE, 0)

  File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\sre_parse.py", line 420, in _parse_sub

    not nested and not items))

  File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\sre_parse.py", line 645, in _parse

    source.tell() - here + len(this))

re.error: nothing to repeat at position 7

Process finished with exit code 1

老师，泛型方法与可变函数在这个代码里面如何体现，就是这个代码逻辑是什么有点模糊。

package com.itbaizhan;

public class MethodGeneric {

    public <T> void method(T ... args){
        for (T t: args) {
            System.out.println(t);
        }
    }
}

public class Test2 {
    public static void main(String[] args) {
        MethodGeneric methodGeneric = new MethodGeneric();
         String[] arr = new String[]{"a","b","c"};
         Integer[] arr2 = new Integer[]{1,2,3};
         methodGeneric.method(arr);
         methodGeneric.method(arr2);
    }
}

老师能不能具体说一下这个命令每一步是什么意思啊

mysql> GRANT replication SLAVE ON *.* TO 'slave' @'%' IDENTIFIED BY '123456';

from urllib.request import Request,build_opener,urlopen
from fake_useragent import UserAgent
from urllib.parse import urlencode
from urllib.request import HTTPCookieProcessor

login_url="https://www.mypianku.net/user/login/"
form_data={
    "user":"18628906572",
    "password":"x..k.d$2000$"
}
headers={
    "User-Agent":UserAgent().random}
req=Request(login_url,headers=headers,data=urlencode(form_data).encode())
opener=build_opener()
resp=opener.open(req)


#---------------------------登录成功--------------------


url="https://www.mypianku.net/user/account/"

headers={
    "User-Agent":UserAgent().random,
    "Cookie":"_pk_id.1.f469=6d7b76987328fd10.1626832666.; d_c=d_1412928085; vrg_sc=4bb1ca6010ff37986d716442a23afa73; vrg_go=1; pyad=2; player123=%E6%B2%90%E6%B5%B4%E4%B9%8B%E7%8E%8BHD%23%23%2Fpy%2FlNmZxwmZsBTZ_1.html%23%235812%23%2394%24%24%E4%B8%80%E8%B7%AF%E6%83%8A%E5%96%9C%E6%AD%A3%E7%89%87%23%23%2Fpy%2FlNmZoRWMp1WM_1.html%23%23271%23%234%24%24%E4%B8%80%E8%B7%AF%E6%83%8A%E5%96%9C%E9%AB%98%E6%B8%85%23%23%2Fpy%2FlNGbrBTZ2wmY_1.html%23%23477%23%238%24%24%E6%B3%95%E5%8C%BB%E7%A7%A6%E6%98%8E2%E6%B8%85%E9%81%93%E5%A4%AB%E7%AC%AC2%E9%9B%86%23%23%2Fpy%2FlNGbmZjY3YmN_2.html%23%231479%23%2368%24%24%E6%B3%95%E5%8C%BB%E7%A7%A6%E6%98%8E%E7%AC%AC03%E9%9B%86%23%23%2Fpy%2FlRmNkdmZsRmN_3.html%23%23837%23%2342%24%24%E4%BA%BA%E5%86%8D%E5%9B%A7%E9%80%94%E4%B9%8B%E6%B3%B0%E5%9B%A7%E6%AD%A3%E7%89%87%23%23%2Fpy%2FlNmZkRjYjlDa_1.html%23%231206%23%2319%24%24%E9%80%9F%E5%BA%A6%E4%B8%8E%E6%BF%80%E6%83%853%EF%BC%9A%E4%B8%9C%E4%BA%AC%E6%BC%82%E7%A7%BBHD1280%E9%AB%98%E6%B8%85%E4%B8%AD%E5%AD%97%E7%89%88%23%23%2Fpy%2FlNWZ5wWb2ADb_1.html%23%23783%23%2313%24%24%E9%80%9F%E5%BA%A6%E4%B8%8E%E6%BF%80%E6%83%856HD1280%E9%AB%98%E6%B8%85%E4%B8%AD%E8%8B%B1%E5%8F%8C%E5%AD%97%E7%89%88%23%23%2Fpy%2FlNWZ5wWb2MzZ_1.html%23%235487%23%2370%24%24%E7%88%B1%E6%83%85%E5%85%AC%E5%AF%93%E7%AC%AC02%E9%9B%86%23%23%2Fpy%2FlRWZ3kGatNDZ_2.html%23%235%23%230%24%24; _pk_ref.1.f469=%5B%22%22%2C%22%22%2C1628861961%2C%22https%3A%2F%2Fcn.bing.com%2F%22%5D; _pk_ses.1.f469=1; PHPSESSID=iihse8vlb216gg5fdg3gp1enr2; Pianku_auth=06c5N-Pw7RaPoL7AOK2gZ9aIXMWGJb9xfbzdsIoHXUhn5Z-bGs1l68_Lhs7og6jww6iG_WLRbyEnhRXTbu_vthptMBgPXAm5yYV9rJlFKV2fnCs086hqg2uotFTErgHhyApWJTPsdVY19PwZJf_HwhyE7FcC83swIfUitbx_hsbqF2XVCp-zj5IU12U; Pianku_cookietime=95b9iaLnS9KECMWRwUf-834BhwpxfnYShmmwOys_Yp0DjXcSV_C1"
}
request=Request(url,headers=headers)
response=urlopen(request)
print(response.read().decode())

老师，请问导入下面这行代码是什么意思呢?
from urllib.request import HTTPCookieProcessor

for x in range(5)  这个括号里的5 是代表个数吗，列表里有几个数字，是这样吗

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <form action="getRequestData.do" method="post">
        <input type="text" name="username"/><br/>
        <input type="password" name="userpwd/"><br/>
        <input type="submit" value="OK"/>
    </form>
</body>
</html>

/**
 * 获取请求数据
 */
public class GetRequestDataServlet extends HttpServlet {
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //获取用户名
        String username = req.getParameter("username");
        //获取用户密码
        String userpwd = req.getParameter("userpwd");

        PrintWriter pw=resp.getWriter();
        pw.println("UserName:"+username);
        pw.println("PassWord:"+userpwd);
        pw.flush();
        pw.close();
    }
}

为什么PassWord那是null?

俺有个疑问，24行Request()为啥传url(登录页面网址)也行，正确的应该是传index_url(登陆成功后的网址)

为啥erl安装几经完成，却显示没有

请问有老师视频里记的课堂笔记吗？word版的

老师，这里Usermapper没有被注册bean对象，怎么可以直接依赖注入的

老師不知道爲什麽輸出的亂碼

from my_fake_useragent import UserAgent
from bs4 import  BeautifulSoup
from time import sleep
import requests

url = 'https://maoyan.com/films/1299372'
header = {'User_Agent':UserAgent().random()}
resp  = requests.get(url,headers=header)

soup = BeautifulSoup(resp.text,'lxml')


print(soup.find_all("a"))

老师，我把数组的第二列都改成了0，像这样的如果出现在实际的数据处理中怎么解决呢？

import pygame

#设置通用属性

BG_COLOR = pygame.Color(255,255,255)

SCREEN_WIDTH = 700

SCREEN_HEIGHT = 500

TEXT_COLOR = pygame.Color(255,0,0)

class MainGame:

  '''

    游戏主窗口类

  '''

  #游戏主窗口对象

  window = None

def __init__(self) -> None:

   pass

def start_game(self) -> None:

  '''

    开始游戏

  '''

  # 初始化游戏窗口

  pygame.display.init()

    #创建一个窗口

  MainGame.window = pygame.display.set_mode((SCREEN_WIDTH,SCREEN_HEIGHT))

  #设置窗口标题

  pygame.display.set_caption('坦克大战1.0')

  #刷新窗口

  while True:

  #给窗口设置填充色

   MainGame.window.fill(BG_COLOR)

  #添加提示文字

  # 1.要添加文字内容

   num = 6

   text = self.get_text_surface(f'敌方坦克的剩余数量{num}')

   #2.如何把文字加上

   MainGame.window.blit(text,(10,10))

   pygame.display.update()

def get_text_surface(self,text:str) ->None:

  """

    获取位置的图片

  """

  #初始化字体模块

  pygame.font.init()

  #获取可以使用的字体

  #print(pygame.font.get_fonts())

  #创建字体

  font = pygame.font.SysFont('kaiti',18)

  #绘制文字信息

  text_surface = font.render(text,True,TEXT_COLOR)

  #将绘制的文字信息返回

  return text_surface

def end_game(self) -> None:

    '''

     结束游戏

     '''

    pass

if __name__ == "__main":

  #调用主窗口类or调用MainGame类中的start_game方法，开始游戏

   MainGame().start_game()    

本节中，使用JsonP进行跨域请求的访问，进行测试的时候，没有任何效果，代码和视频中一样。具体项目代码打包如下，希望老师帮忙看下，哪里出了问题