老师这个为啥报错

#【6】要求输入员工薪资，若薪资小于0则重新输入，最后打印出录入员工的数量和薪资明细并求出平均薪资
empNum=0
salarys=[]
salarySum=0
while True:
    s=input("请输入员工薪资:(输入q或Q时退出):")
    if s.upper =="Q":
        print("录入完成，退出")
        break#输入q要退出循环
    if float(s)<0:
        print("请重新输入：")
        continue
    empNum += 1
    salarys.append(float(s))
    salarySum += float(s)
if empNum != 0:#除数不为0，才能求平均
print("员工数量:",empNum)
print("薪资明细:",salarys.append(float(s)))
print("平均薪资:",salarySum/empNum)

老师，我按照你发的代码自己又敲了一遍，但是还是显示第10行有问题，我又重输了好几次，不知道为什么

class Student:
    def __init__(self,name,score,age,salary):
        self.name = name
        self.score = score
        self.age=age
        self.salary=salary
    def say_score(self):
        print("{0}的分数是{1}".format(self.name,self.score))
    def say_age(self):
        print("{0}的年龄是{1}".format(self.name, self.age))
    def say_salary(self):
        print("{0}的薪资是{1}".format(self.name, self.salary))
S1 = Student("高琪",78,18,3000)
S1.say_score()
S1.say_age()
S1.say_salary()

这个还能再简化吗，老师。

java.net.ConnectException: Connection refused: connect

at java.base/java.net.DualStackPlainSocketImpl.connect0(Native Method)

at java.base/java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79)

at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:400)

at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:243)

at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:225)

at java.base/java.net.PlainSocketImpl.connect(PlainSocketImpl.java:148)

at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:402)

at java.base/java.net.Socket.connect(Socket.java:591)

at org.apache.commons.net.SocketClient.connect(SocketClient.java:182)

at org.apache.commons.net.SocketClient.connect(SocketClient.java:203)

at com.bjsxt.commons.FtpUtil.uploadFile(FtpUtil.java:39)

at com.bjsxt.service.impl.PicUploadServiceImpl.fileUpload(PicUploadServiceImpl.java:49)

at com.bjsxt.web.controller.PicUploadController.fileUpload(PicUploadController.java:31)

at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.base/java.lang.reflect.Method.invoke(Method.java:564)

at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)

at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)

at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)

at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:777)

at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:706)

at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)

at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:943)

at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877)

at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)

at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:868)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)

at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)

at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)

at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)

at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)

at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)

at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)

at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)

at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)

at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1135)

at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)

at java.base/java.lang.Thread.run(Thread.java:844)

上传截图出现无法连接的错误，不知道什么原因

老师IDEA总是显示这个：

信息 [RMI TCP Connection(3)-127.0.0.1] org.apache.jasper.servlet.TldScanner.scanJars 至少有一个JAR被扫描用于TLD但尚未包含TLD。 为此记录器启用调试日志记录，以获取已扫描但未在其中找到TLD的完整JAR列表。 在扫描期间跳过不需要的JAR可以缩短启动时间和JSP编译时间。

老师，django2.2版本开发调试模块这里应该怎么改啊，网上也没找到相关的

请问下这个字符串驻留池是指的存放字符串的内存么

老师，我想问下，这个项目能写上简历么？我的意思是这个项目太多人写了，我是不是应该把项目名字给换一下再写到简历上去？

老师好   

1. 请问视频中老师是用什么测量工具 好方便的哦

2. 我的火狐浏览器点击页面空白处 没有一次性保存很多图片功能

老师，pycharm里没有字符串驻留机制吗？

package com.ITbaizhan.test;

import java.util.Arrays;

public class testBinarySearch {
    public static void main(String[] args) {
        int[] arr ={1,5,9,7,6,3,2,8,4};
        int searchword =4;
        int a =binarysearch(arr,searchword);
        System.out.println(a);
    }
    public static int binarysearch(int[] array,int value){
        int low =0;
        int high = array.length-1;
        while(low<=high){
             int middle =(low+high)/2;
                if (value==array[middle]){
                    return middle;
                }   if(value<array[middle]) {
                    high =middle-1;
                    }if(value>array[middle]){
                        low=middle+1;
                     }
                }return -1;
    }
}

老师，为什么我数组最后一个4，搜索不出来

  老师我这火狐和谷歌还是一直在拦截  ，IE浏览器是可以访问的，但是火狐和谷歌不能访问，是版本问题吗，但是我在网上下载了好几个版本还是一样的，如果老师有谷歌和火狐安装包发我一下我在试试

老师，第二个这里是不是应该为 not in 啊

老师，这个Mongo视频中文档，资料里没有？