老师我的xshell老是连上去一下子就卡住然后断掉连接，一直这样百度那些方法都试了都不行，之前连的WiFi跟现在的不一样，之前ip都是192.168.100开头的，现在是192.168.0开头会不会跟这个有关系

老师讲的实例对象共享类属性，从运行结果看 实例对象也有company和count属性

class Student:

    company = "SXT"  # 类属性，从属与类；实例对象可以通过“类名.类变量名（company)”访问
    count = 0

    def __init__(self, name, score):
        self.name = name
        self.score = score
        Student.count = Student.count + 1  # 实例调用类属性

    def say_score(self):
        print("我的公司是：", self.company)
        print(self.name, '的分数是', self.score)


s1 = Student('张三', 80)
s1.say_score()
s2 = Student('李四', 100)
print('一共创建{0}个Student对象'.format(Student.count))
print(s1.count)
print(s1.company)
print(Student.count)

在运行“Solr新增功能”时，出现如下错误提示

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2021-01-17 21:56:11.983 ERROR 14004 --- [           main] o.s.boot.SpringApplication               : Application run failed

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'searchController': Unsatisfied dependency expressed through field 'searchService'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'searchServiceImpl': Injection of @Reference dependencies is failed; nested exception is java.lang.IllegalStateException: zookeeper not connected
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:643) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:130) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:399) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1422) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:594) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:879) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:878) ~[spring-context-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550) ~[spring-context-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]
	at com.ego.SearchApp.main(SearchApp.java:9) [classes/:na]
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'searchServiceImpl': Injection of @Reference dependencies is failed; nested exception is java.lang.IllegalStateException: zookeeper not connected
	at com.alibaba.spring.beans.factory.annotation.AbstractAnnotationBeanPostProcessor.postProcessPropertyValues(AbstractAnnotationBeanPostProcessor.java:145) ~[spring-context-support-1.0.5.jar:na]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1427) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:594) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1287) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1207) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:640) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	... 19 common frames omitted
Caused by: java.lang.IllegalStateException: zookeeper not connected
	at org.apache.dubbo.remoting.zookeeper.curator.CuratorZookeeperClient.<init>(CuratorZookeeperClient.java:83) ~[dubbo-2.7.5.jar:2.7.5]
	at org.apache.dubbo.remoting.zookeeper.curator.CuratorZookeeperTransporter.createZookeeperClient(CuratorZookeeperTransporter.java:26) ~[dubbo-2.7.5.jar:2.7.5]
	at org.apache.dubbo.remoting.zookeeper.support.AbstractZookeeperTransporter.connect(AbstractZookeeperTransporter.java:68) ~[dubbo-2.7.5.jar:2.7.5]
	at org.apache.dubbo.remoting.zookeeper.ZookeeperTransporter$Adaptive.connect(ZookeeperTransporter$Adaptive.java) ~[dubbo-2.7.5.jar:2.7.5]
	at org.apache.dubbo.configcenter.support.zookeeper.ZookeeperDynamicConfiguration.<init>(ZookeeperDynamicConfiguration.java:70) ~[dubbo-2.7.5.jar:2.7.5]
	at org.apache.dubbo.configcenter.support.zookeeper.ZookeeperDynamicConfigurationFactory.createDynamicConfiguration(ZookeeperDynamicConfigurationFactory.java:37) ~[dubbo-2.7.5.jar:2.7.5]
	at org.apache.dubbo.common.config.configcenter.AbstractDynamicConfigurationFactory.lambda$getDynamicConfiguration$0(AbstractDynamicConfigurationFactory.java:39) ~[dubbo-2.7.5.jar:2.7.5]
	at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660) ~[na:1.8.0_202]
	at org.apache.dubbo.common.config.configcenter.AbstractDynamicConfigurationFactory.getDynamicConfiguration(AbstractDynamicConfigurationFactory.java:39) ~[dubbo-2.7.5.jar:2.7.5]
	at org.apache.dubbo.common.config.configcenter.DynamicConfiguration.getDynamicConfiguration(DynamicConfiguration.java:223) ~[dubbo-2.7.5.jar:2.7.5]
	at org.apache.dubbo.config.bootstrap.DubboBootstrap.prepareEnvironment(DubboBootstrap.java:815) ~[dubbo-2.7.5.jar:2.7.5]
	at org.apache.dubbo.config.bootstrap.DubboBootstrap.startConfigCenter(DubboBootstrap.java:560) ~[dubbo-2.7.5.jar:2.7.5]
	at org.apache.dubbo.config.bootstrap.DubboBootstrap.useRegistryAsConfigCenterIfNecessary(DubboBootstrap.java:624) ~[dubbo-2.7.5.jar:2.7.5]
	at org.apache.dubbo.config.bootstrap.DubboBootstrap.initialize(DubboBootstrap.java:508) ~[dubbo-2.7.5.jar:2.7.5]
	at org.apache.dubbo.config.bootstrap.DubboBootstrap.init(DubboBootstrap.java:493) ~[dubbo-2.7.5.jar:2.7.5]
	at org.apache.dubbo.config.ReferenceConfig.init(ReferenceConfig.java:183) ~[dubbo-2.7.5.jar:2.7.5]
	at org.apache.dubbo.config.ReferenceConfig.get(ReferenceConfig.java:151) ~[dubbo-2.7.5.jar:2.7.5]
	at org.apache.dubbo.config.spring.beans.factory.annotation.ReferenceAnnotationBeanPostProcessor.getOrCreateProxy(ReferenceAnnotationBeanPostProcessor.java:249) ~[dubbo-2.7.5.jar:2.7.5]
	at org.apache.dubbo.config.spring.beans.factory.annotation.ReferenceAnnotationBeanPostProcessor.doGetInjectedBean(ReferenceAnnotationBeanPostProcessor.java:142) ~[dubbo-2.7.5.jar:2.7.5]
	at com.alibaba.spring.beans.factory.annotation.AbstractAnnotationBeanPostProcessor.getInjectedObject(AbstractAnnotationBeanPostProcessor.java:358) ~[spring-context-support-1.0.5.jar:na]
	at com.alibaba.spring.beans.factory.annotation.AbstractAnnotationBeanPostProcessor$AnnotatedFieldElement.inject(AbstractAnnotationBeanPostProcessor.java:538) ~[spring-context-support-1.0.5.jar:na]
	at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:130) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at com.alibaba.spring.beans.factory.annotation.AbstractAnnotationBeanPostProcessor.postProcessPropertyValues(AbstractAnnotationBeanPostProcessor.java:141) ~[spring-context-support-1.0.5.jar:na]
	... 30 common frames omitted
Caused by: java.lang.IllegalStateException: zookeeper not connected
	at org.apache.dubbo.remoting.zookeeper.curator.CuratorZookeeperClient.<init>(CuratorZookeeperClient.java:80) ~[dubbo-2.7.5.jar:2.7.5]
	... 52 common frames omitted

2021-01-17 21:56:11.985  INFO 14004 --- [bboShutdownHook] o.apache.dubbo.config.DubboShutdownHook  :  [DUBBO] Run shutdown hook now., dubbo version: 2.7.5, current host: 169.254.20.197
2021-01-17 21:56:11.986  INFO 14004 --- [bboShutdownHook] o.a.d.c.e.listener.LoggingEventListener  :  [DUBBO] Dubbo Service has been destroyed., dubbo version: 2.7.5, current host: 169.254.20.197

Process finished with exit code 1

请问老师：

出现该问题可能是什么原因，该如何解决？

我的SearchServiceImpl.java的代码为

package com.ego.search.service.impl;

import com.ego.dubbo.service.TbItemCatDubboService;
import com.ego.dubbo.service.TbItemDescDubboService;
import com.ego.dubbo.service.TbItemDubboService;
import com.ego.entity.TbItem;
import com.ego.entity.TbItemCat;
import com.ego.entity.TbItemDesc;
import com.ego.search.entity.SearchEntity;
import com.ego.search.service.SearchService;
import org.apache.dubbo.config.annotation.Reference;
import org.apache.solr.client.solrj.response.UpdateResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Sort;
import org.springframework.data.solr.core.SolrTemplate;
import org.springframework.data.solr.core.query.Criteria;
import org.springframework.data.solr.core.query.HighlightOptions;
import org.springframework.data.solr.core.query.HighlightQuery;
import org.springframework.data.solr.core.query.SimpleHighlightQuery;
import org.springframework.data.solr.core.query.result.HighlightEntry;
import org.springframework.data.solr.core.query.result.HighlightPage;
import org.springframework.stereotype.Service;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Service
public class SearchServiceImpl implements SearchService {

    @Autowired
    private SolrTemplate solrTemplate;

    @Reference
    private TbItemDubboService tbItemDubboService;

    @Reference
    private TbItemCatDubboService tbItemCatDubboService;

    @Reference
    private TbItemDescDubboService tbItemDescDubboService;

    @Override
    public Map<String, Object> search(String q, int page, int size) {
        //设置查询条件
        Criteria criteria = new Criteria("item_keywords");
        criteria.is(q);
        HighlightQuery query = new SimpleHighlightQuery(criteria);

        //设置排序规则
        query.addSort(Sort.by(Sort.Direction.DESC, "_version_")); //_version_相当于一个时间戳字段

        //分页设置
        query.setOffset((long) size * (page - 1));
        query.setRows(size);

        //设置查询结果高亮
        HighlightOptions options = new HighlightOptions();
        options.setSimplePrefix("<span style='color:red'>");
        options.setSimplePostfix("</span>");
        options.addField("item_title item_sell_point"); //指定查询的字段
        query.setHighlightOptions(options);

        //执行查询
        HighlightPage<SearchEntity> results = solrTemplate.queryForHighlightPage("ego", query, SearchEntity.class);//ego是Solr的Core，相当于库。

        /**
         * 查询结果主要包括：
         * responseHeader
         * response
         *     numFound
         *     start
         *     docs ...
         *     highlighting ...
         */

        //取出高亮结果数据
        List<HighlightEntry<SearchEntity>> highlighted = results.getHighlighted();

        //通过一个集合存放所有查询到的数据，对应页面中的${itemList}。
        ArrayList<SearchEntity> list = new ArrayList<>();

        for (HighlightEntry<SearchEntity> he:highlighted){
            //非高亮数据：docs
            SearchEntity entity = he.getEntity();

            //将solr中的image转换为images
            String image = entity.getImage();
            entity.setImages(image!=null&&!image.equals("")?image.split(","):new String[1]);

            //高亮数据：highlighting
            List<HighlightEntry.Highlight> highlights = he.getHighlights();
            for (HighlightEntry.Highlight highlight:highlights){
                //包含查询字段名的数据就是高亮数据
                if ("item_title".equals(highlight.getField().getName())){
                    //高亮数据替换非高亮数据
                    entity.setTitle(highlight.getSnipplets().get(0));
                }
            }

            //收集所有查询到的高亮数据
            list.add(entity);
        }

        HashMap<String, Object> map = new HashMap<>();
        map.put("itemList",list);
        map.put("query",q);
        map.put("totalPages",results.getTotalPages());
        return map;
    }

    /**
     * Solr批量新增
     * @param ids 新增商品的若干id
     * @return
     */
    @Override
    public int insert(long[] ids) {
        List<SearchEntity> list=new ArrayList<>();
        for (long id: ids){
            SearchEntity searchEntity = new SearchEntity();
            TbItem tbItem = tbItemDubboService.selectById(id);
            searchEntity.setImage(tbItem.getImage());
            searchEntity.setTitle(tbItem.getTitle());
            searchEntity.setId(id);
            searchEntity.setPrice(tbItem.getPrice());
            searchEntity.setSellPoint(tbItem.getSellPoint());
            TbItemCat tbItemCat = tbItemCatDubboService.selectById(tbItem.getCid());
            searchEntity.setCatName(tbItemCat.getName());
            TbItemDesc tbItemDesc = tbItemDescDubboService.selectById(id);
            searchEntity.setDesc(tbItemDesc.getItemDesc());
            list.add(searchEntity);
        }
        UpdateResponse response = solrTemplate.saveBeans("ego", list);
        solrTemplate.commit("ego"); //须提交事务
        if (response.getStatus()==0){ //Solr新增成功
            return 1;
        }
        return 0;
    }
}

根据错误提示已经做过的排查工作：

1.  发现“private SolrTemplate solrTemplate;”语句在IDEA中有编译错误。

将SolrTemplate改为父接口SolrOperations，启动SearchApp启动类仍出现前述错误提示。

2. 检查zookeeper发现相应的consumer和provider注册正常

3. 先启动其他服务最后再启动SearchApp出现前述错误提示。

4. 经分析，觉得报错是由于SearchServiceImpl类中@Reference注解注入失败所致。于是注释所有@Reference注解，并启动SearchApp主类发现可以正常启动。

现在，不知道为什么@Reference注入会失败，烦请老师解答。

我看见好像跟别的同学问的都一样，但是咱们之前的资料里都是1.8.0的版本的nginx，也没有找到视频里这个版本的，然后现在nginx也安装不上去，这个怎么解决一下呢？

怎么设置了两个？老师，iteamid不是主键吗

# 类包装-启动多线程
from threading import Thread
from time import sleep, time


class MyThread(Thread):
    def __init__(self, name):
        Thread.__init__(self)
        self.name = name

    def run(self):
        print(f"Threading:{self.name} start")
        sleep(3)
        print(f"Threading:{self.name} end ")


if __name__ == '__main__':
    # 开始时间
    start = time()
    # 创建线程列表
    t_list = []
    # 循环创建线程
    for i in range(10):
        t = MyThread(f't{i}')
        t.start()
        t_list.append(t)
        # 等待线程结束
    for t in t_list:
        t.join()
    # 计算使用时间
    end = time() - start
    print(end)

 请问为什么    Threading 结束的内容  格式 不和开始 的格式 一样？

C:\Users\Administrator\AppData\Local\Programs\Python\Python38\python.exe "H:/python DM/并发编程/02_多线程测试_类方法启动.py"

Threading:t0 start

Threading:t1 start

Threading:t2 start

Threading:t3 start

Threading:t4 start

Threading:t5 start

Threading:t6 start

Threading:t7 start

Threading:t8 start

Threading:t9 start

Threading:t1 end 

Threading:t0 end 

Threading:t5 end 

Threading:t4 end Threading:t3 end Threading:t2 end 

Threading:t9 end 

Threading:t8 end Threading:t7 end Threading:t6 end 

3.003864288330078

Process finished with exit code 0

from threading import Thread,Event
from time import sleep


def car():
    global count
    while True:
        if count % 5 != 0:
            print('车到站')
            sleep(1)
            count += 1
        else:
            print('车没来')
            sleep(6)
            count = 1


def person():
    while True:
        if count % 5 != 0:
            print('上车！！！！')
            sleep(1)
        else:
            print('等待中。。。。')
            sleep(1)

if __name__ == '__main__':
    count = 1
    t1 = Thread(target=car)
    t2 = Thread(target=person)
    t1.start()
    t2.start()

问题一：出现了以下情况提示一次车到站却有两个上车

问题二：

老师啊,这是个问题啊.和视频里的比对了好几遍没发现什么不对.

老师您好，我创建的这个文件的时候没了虚拟环境，不影响吧

老师,麻烦帮我看一下应该是哪里出错了.我实在是找不出来了

老师，我这个运行之后，页面不显示阿

老师，视频中提到的“必须使用同一把锁” 这个使用同一把锁是如何实现的？

老师，请问打印薪资大于15000的题目，我在运行if x.get("salary")>15000的时候会报错呢

老师这个问题该怎么解决啊？上网查了发现有好多说法，而且解决方法说的也不是很清楚。。。

老师，你可以统计下，因为你：

1.  中英文切换不及时

2. 中文打错

3. 英文打错

4. 同一个中文一遍又一遍的打错

5. 同一个英文一遍又一遍的打错

6. 用全角的标点符号写代

7. 极其简单的代码肉眼可见的写错导致反复重跑

一共导致了多少无效视频的时间吗？看着您不用心的这些操作，真心烦躁。