yu = a % b;9;中的9 是什么意思

为什么照着讲义的代码写了一遍会出现图中显示错误？

a啊？

老师，我这个是？

PS D:\vscodeproject2\爬虫\Scarpy\scarpy05> & D:/python_env/spider2_env_/Scripts/Activate.ps1

(spider2_env_) PS D:\vscodeproject2\爬虫\Scarpy\scarpy05> & D:/python_env/spider2_env_/Scripts/python.exe d:/vscodeproject2/爬虫/Scarpy/scarpy05/scarpy05/begin.py

2023-12-26 22:01:30 [scrapy.utils.log] INFO: Scrapy 2.6.1 started (bot: scarpy05)

2023-12-26 22:01:30 [scrapy.utils.log] INFO: Versions: lxml 4.8.0.0, libxml2 2.9.12, cssselect 1.1.0, parsel 1.6.0, w3lib 1.22.0, Twisted 22.4.0, Python 3.10.0 (tags/v3.10.0:b494f59, Oct  4 2021, 19:00:18) [MSC v.1929 64 bit (AMD64)], pyOpenSSL 22.0.0 (OpenSSL 1.1.1n  15 Mar 2022), cryptography 36.0.2, Platform Windows-10-10.0.19045-SP0

2023-12-26 22:01:30 [scrapy.crawler] INFO: Overridden settings:

{'BOT_NAME': 'scarpy05',

 'NEWSPIDER_MODULE': 'scarpy05.spiders',

 'SPIDER_MODULES': ['scarpy05.spiders']}

2023-12-26 22:01:30 [scrapy.utils.log] DEBUG: Using reactor: twisted.internet.selectreactor.SelectReactor

2023-12-26 22:01:30 [scrapy.extensions.telnet] INFO: Telnet Password: 2e9c559873783f27

2023-12-26 22:01:30 [scrapy.middleware] INFO: Enabled extensions:

['scrapy.extensions.corestats.CoreStats',

 'scrapy.extensions.telnet.TelnetConsole',

 'scrapy.extensions.logstats.LogStats']

2023-12-26 22:01:30 [scrapy.middleware] INFO: Enabled downloader middlewares:

['scrapy.downloadermiddlewares.httpauth.HttpAuthMiddleware',

 'scrapy.downloadermiddlewares.downloadtimeout.DownloadTimeoutMiddleware',   

 'scrapy.downloadermiddlewares.defaultheaders.DefaultHeadersMiddleware',

 'scrapy.downloadermiddlewares.useragent.UserAgentMiddleware',

 'scrapy.downloadermiddlewares.retry.RetryMiddleware',

 'scrapy.downloadermiddlewares.redirect.MetaRefreshMiddleware',

 'scrapy.downloadermiddlewares.httpcompression.HttpCompressionMiddleware',

 'scrapy.downloadermiddlewares.redirect.RedirectMiddleware',

 'scrapy.downloadermiddlewares.cookies.CookiesMiddleware',

 'scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware',

 'scrapy.downloadermiddlewares.stats.DownloaderStats']

2023-12-26 22:01:30 [scrapy.middleware] INFO: Enabled spider middlewares:

['scrapy.spidermiddlewares.httperror.HttpErrorMiddleware',

 'scrapy.spidermiddlewares.offsite.OffsiteMiddleware',

 'scrapy.spidermiddlewares.referer.RefererMiddleware',

 'scrapy.spidermiddlewares.urllength.UrlLengthMiddleware',

 'scrapy.spidermiddlewares.depth.DepthMiddleware']

Unhandled error in Deferred:

2023-12-26 22:01:30 [twisted] CRITICAL: Unhandled error in Deferred:

Traceback (most recent call last):

  File "D:\python_env\spider2_env_\lib\site-packages\scrapy\crawler.py", line 206, in crawl

    return self._crawl(crawler, *args, **kwargs)

  File "D:\python_env\spider2_env_\lib\site-packages\scrapy\crawler.py", line 210, in _crawl

    d = crawler.crawl(*args, **kwargs)

  File "D:\python_env\spider2_env_\lib\site-packages\twisted\internet\defer.py", line 1905, in unwindGenerator

    return _cancellableInlineCallbacks(gen)

  File "D:\python_env\spider2_env_\lib\site-packages\twisted\internet\defer.py", line 1815, in _cancellableInlineCallbacks

    _inlineCallbacks(None, gen, status)

--- <exception caught here> ---

  File "D:\python_env\spider2_env_\lib\site-packages\twisted\internet\defer.py", line 1660, in _inlineCallbacks

    result = current_context.run(gen.send, result)

  File "D:\python_env\spider2_env_\lib\site-packages\scrapy\crawler.py", line 102, in crawl

    self.engine = self._create_engine()

  File "D:\python_env\spider2_env_\lib\site-packages\scrapy\crawler.py", line 116, in _create_engine

    return ExecutionEngine(self, lambda _: self.stop())

  File "D:\python_env\spider2_env_\lib\site-packages\scrapy\core\engine.py", line 84, in __init__

    self.scraper = Scraper(crawler)

  File "D:\python_env\spider2_env_\lib\site-packages\scrapy\core\scraper.py", line 75, in __init__

    self.itemproc = itemproc_cls.from_crawler(crawler)

  File "D:\python_env\spider2_env_\lib\site-packages\scrapy\middleware.py", line 59, in from_crawler

    return cls.from_settings(crawler.settings, crawler)

  File "D:\python_env\spider2_env_\lib\site-packages\scrapy\middleware.py", line 41, in from_settings

    mw = create_instance(mwcls, settings, crawler)

  File "D:\python_env\spider2_env_\lib\site-packages\scrapy\utils\misc.py", line 166, in create_instance

    instance = objcls.from_crawler(crawler, *args, **kwargs)

  File "D:\python_env\spider2_env_\lib\site-packages\scrapy\pipelines\media.py", line 76, in from_crawler

    pipe = cls.from_settings(crawler.settings)

  File "D:\python_env\spider2_env_\lib\site-packages\scrapy\pipelines\images.py", line 112, in from_settings

    return cls(store_uri, settings=settings)

  File "D:\python_env\spider2_env_\lib\site-packages\scrapy\pipelines\images.py", line 55, in __init__

    super().__init__(store_uri, settings=settings, download_func=download_func)

  File "D:\python_env\spider2_env_\lib\site-packages\scrapy\pipelines\files.py", line 329, in __init__

    self.store = self._get_store(store_uri)

  File "D:\python_env\spider2_env_\lib\site-packages\scrapy\pipelines\files.py", line 378, in _get_store

    store_cls = self.STORE_SCHEMES[scheme]

builtins.KeyError: 'd'

2023-12-26 22:01:30 [twisted] CRITICAL:

Traceback (most recent call last):

  File "D:\python_env\spider2_env_\lib\site-packages\twisted\internet\defer.py", line 1660, in _inlineCallbacks

    result = current_context.run(gen.send, result)

  File "D:\python_env\spider2_env_\lib\site-packages\scrapy\crawler.py", line 102, in crawl

    self.engine = self._create_engine()

  File "D:\python_env\spider2_env_\lib\site-packages\scrapy\crawler.py", line 116, in _create_engine

    return ExecutionEngine(self, lambda _: self.stop())

  File "D:\python_env\spider2_env_\lib\site-packages\scrapy\core\engine.py", line 84, in __init__

    self.scraper = Scraper(crawler)

  File "D:\python_env\spider2_env_\lib\site-packages\scrapy\core\scraper.py", line 75, in __init__

    self.itemproc = itemproc_cls.from_crawler(crawler)

  File "D:\python_env\spider2_env_\lib\site-packages\scrapy\middleware.py", line 59, in from_crawler

    return cls.from_settings(crawler.settings, crawler)

  File "D:\python_env\spider2_env_\lib\site-packages\scrapy\middleware.py", line 41, in from_settings

    mw = create_instance(mwcls, settings, crawler)

  File "D:\python_env\spider2_env_\lib\site-packages\scrapy\utils\misc.py", line 166, in create_instance

    instance = objcls.from_crawler(crawler, *args, **kwargs)

  File "D:\python_env\spider2_env_\lib\site-packages\scrapy\pipelines\media.py", line 76, in from_crawler

    pipe = cls.from_settings(crawler.settings)

  File "D:\python_env\spider2_env_\lib\site-packages\scrapy\pipelines\images.py", line 112, in from_settings

    return cls(store_uri, settings=settings)

  File "D:\python_env\spider2_env_\lib\site-packages\scrapy\pipelines\images.py", line 55, in __init__

    super().__init__(store_uri, settings=settings, download_func=download_func)

  File "D:\python_env\spider2_env_\lib\site-packages\scrapy\pipelines\files.py", line 329, in __init__

    self.store = self._get_store(store_uri)

  File "D:\python_env\spider2_env_\lib\site-packages\scrapy\pipelines\files.py", line 378, in _get_store

    store_cls = self.STORE_SCHEMES[scheme]

KeyError: 'd'

(spider2_env_) PS D:\vscodeproject2\爬虫\Scarpy\scarpy05>

这里定义类class MyNumbers 里面为什么不写__init__（）方法了？

import java.awt.*;
import javax.swing.*;

public class BallGame extends JFrame {

    Image ball = Toolkit.getDefaultToolkit().getImage("images/ball.png");
    Image desk = Toolkit.getDefaultToolkit().getImage("images/desk.png");

    //绘制窗口
    public void paint(Graphics g){
        System.out.println("窗口被画了一次！");
        g.drawImage(desk,0,0,null);
        g.drawImage(ball,200,200,null);

        //实现动画每秒绘制窗口25次
        while(true){
            repaint();

            try {
                Thread.sleep(40);   //1s=1000ms，1000/40=25，每秒画25次。
            } catch (InterruptedException e) {
                //throw new RuntimeException(e);
                e.printStackTrace();
            }
        }
    }

    //创建窗口
    void launchFrame(){
        setSize(856,501);
        setLocation(100,100);
        setVisible(true);
    }

    public static void main(String[] args){

        System.out.println("我的小游戏开始啦");

        BallGame game = new BallGame();
        game.launchFrame();

    }

}

加入while(true){}之后，程序出现卡死情况，窗口无法正常绘制。

运行程序：

停止：

我这个dubbo启动后就一直访问不到，查看日志发现他一直走得是docker网络，怎么解决呢？

老师，麻烦看下我这儿一创建就报错怎么回事，解决不了额

老师，这是为什么？

安装jre如图显示

#请问一下老师，怎么关闭自动增长呢？

老师，视图函数是啥意思，想问一下

#请问：语句的约束名是随便取的吗？老师

这节课主要讲啥 是说 普通函数可以通过函数名()的形式去调用函数，但是类对象的实例方法不能用这种方式去调用，如果想用函数名()的形式去调用的话 就需要定义一个call方法对么，看了好几遍 听着听着就糊涂了