有效沟通问答-【官方】百战程序员_IT在线教育培训机构

a={'name=高小一','age=18','salary=30000','city=北京'}
b={'name=高小二','age=19','salary=20000','city=上海'}
c={'name=高小三','age=20','salary=10000','city=深圳'}
x=[a,b,c]
print(x)

老师请问这个输出想要换行用\n的正确格式是啥啊

Python 全系列/第一阶段：Python入门/编程基本概念 22534楼

老师，类变量就是类属性，实例变量就是实例属性吗？

Python 全系列/第一阶段：Python入门/面向对象 22535楼

from threading import Thread
from time import sleep
class MyThread(Thread):
    def __init__(self, name):
        Thread.__init__(self)
        self.name = name

    def run(self):
        print("开始")
        print(f"射雕三部曲：{self.name}")
        sleep(5)
        print("结束")
for i in range(20):
    t1 = MyThread("神雕英雄传,神雕侠侣,倚天屠龙记")
    t1.setDaemon(True)
    t1.start()

print("主进程结束啦")

请问老师：上述代码，运行报下图错误是什么原因?

Python 全系列/第三阶段：Python 网络与并发编程/并发编程 22536楼

//同意框
var check=document.getElementById("check");
//提交
var sub=document.getElementById("sub");
sub.disabled = !check.checked;

1.disabled 不可用,check下的checked方法模式是false? 取反变成true,disabled变成可用了?是这样吗

JAVA 全系列/第五阶段：网页编程和设计/Javascript 语言（旧） 22537楼

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>

        div{
            width:50px;
            height:25px;
            border:1px solid black;
            text-align:center;
            line-height:25px;
            float:left;

        }
        button{
            clear:left;
        }

    </style>
</head>
<body>
<div></div>
<button></button>
</body>
</html>

那行内元素受到的浮动影响，怎么消除

WEB前端全系列/第一阶段：HTML5+CSS3模块/CSS常用属性 22538楼

如果输入一百会不会index outof range呢

Python 全系列/第一阶段：Python入门/控制语句 22539楼

EditPlus好像是版本不同,窗口功能不一样,后续的连接也报错了

JAVA 全系列/第十四阶段：分布式文件存储与数据缓存/Nginx 22540楼

elc-box中最后一个盒子中浏览更多设置宽高不生效字体图标大小也不生效（字体图标不显示这个问题也有疑问，）

           <!-- 家电部分 -->
            <div class="elc">
                <div class="elc-nav">
                    <a href="#">
                        <img src="../images/41d16e66381cfeda7b6b39ab67678d5e.jpg" alt="">  
                    </a>
                </div>     
                <h2 class="title">家电
                    <a href="#">
                        <span>热门</span>
                        <span>电视影音</span>
                    </a>
                </h2>
                <div class="elc-box">
                    <div class="items-2">
                        <a href="#">
                            <img src="../images/116fc43816b87192be4e67cf762e8da5.jpeg" alt="">
                         </a>
                    </div>
                    <div class="items-1">
                        <a href="#">
                            <img src="../images/03a9e7e96a09d256ca1badeec186c859.jpg" alt=""  class="img1">
                                <h3 class="name2">小米全面屏电视65英寸 E65X </h3>
                                <p class="desc2">全面屏设计</p>
                                <p class="price2">2999元<del class="original">3299元</del></p>
                        </a>
                    </div>
                    <div class="items-1">
                        <a href="#">
                            <img src="../images/20d36fbaa18625e4fe507af31e4e9f83.jpg" alt="" class="img1">
                            <h3 class="name2">全面屏电视E43K  </h3>
                            <p class="desc2">全面屏设计，海量内容</p>
                            <p class="price2">1349元<del class="original">1500元</del></p>
                        </a>
                    </div>
                    <div class="items-1">
                        <a href="#">
                            <img src="../images/9d8674cd21c486feff5328772ab9cf01.jpg" alt="" class="img1">
                            <h3 class="name2">小小米电视4A 70英寸 </h3>
                            <p class="desc2">大屏更享受</p>
                            <p class="price2">3599元<del class="original">3900元</del></p>
                        </a>
                    </div>
                    <div class="items-1">
                        <a href="#">
                            <img src="../images/6bed167fc905bab57dee478bcf1e5e0d.JPG" alt="" class="img1">
                            <h3 class="name2">米家互联网对开门冰箱 540L </h3>
                            <p class="desc2">重磅新品福利特惠</p>
                            <p class="price2">2999元<del class="original">3600元</del></p>
                        </a>
                    </div>
                    <div class="items-2">
                        <a href="#">
                            <img src="../images/dfbdabe36b2d630d57a015e6fb5eb3ea.jpg" alt="">
                        </a>
                    </div>
                    <div class="items-1">
                        <a href="#">
                            <img src="../images/b8c63a2024528fe5410ebe669b7d2407.jpg" alt="" class="img1">
                            <h3 class="name2">Redmi全自动波轮洗衣机1A 8kg</h3>
                            <p class="desc2">一键操作，父母都爱用</p>
                            <p class="price2">849元<del class="original">899元</del></p>
                        </a>
                    </div>
                    <div class="items-1">
                        <a href="#">
                            <img src="../images/74e573c4c0d89048392d14831cc507d5.jpg" alt="" class="img1">
                            <h3 class="name2">Air 13.3" 2019款 </h3>
                            <p class="desc2">新一代独立显卡</p>
                            <p class="price2">6299元</p>
                        </a>
                    </div>
                    <div class="items-1">
                        <a href="#">
                            <img src="../images/7e5f89adf98ab3fccb34012b5209cd58.jpg" alt="" class="img1">
                            <h3 class="name2">米家互联网烟灶套装（天然气）</h3>
                            <p class="desc2">点火排烟，风随火动</p>
                            <p class="price2">2298元</p>
                        </a>
                    </div>
                    <div class="items-last">
                        <div>
                            <a href="#">
                                <img src="../images/1612c93ad4756215774a0dbec7a81bb2.jpg" alt="">
                                <h3 class="name2">米家电烤箱 </h3>
                                <p class="price2">279元</p>
                            </a>
                        </div>
                        <div>
                            <a href="#">
                                <div class="more">浏览更多
                                    <small>电视影音</small>
                                </div>
                                <i class="icontfont">&#xe619;</i>
                            </a>
                        </div>
                    </div>
                </div>
            </div>

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>小米广告部分</title>
    <link rel="icon" href="../images/favicon.ico">
    <link rel="stylesheet" href="../css/reset.css">
    <!-- <link rel="stylesheet" href="../css/demo.css "> -->
    <link rel="stylesheet" href="小米.css">
</head>
<body>
 <div class="content">
        <div class="wrap">
           <!-- 家电部分 -->
            <div class="elc">
                <div class="elc-nav">
                    <a href="#">
                        <img src="../images/41d16e66381cfeda7b6b39ab67678d5e.jpg" alt="">  
                    </a>
                </div>     
                <h2 class="title">家电
                    <a href="#">
                        <span>热门</span>
                        <span>电视影音</span>
                    </a>
                </h2>
                <div class="elc-box">
                    <div class="items-2">
                        <a href="#">
                            <img src="../images/116fc43816b87192be4e67cf762e8da5.jpeg" alt="">
                         </a>
                    </div>
                    <div class="items-1">
                        <a href="#">
                            <img src="../images/03a9e7e96a09d256ca1badeec186c859.jpg" alt=""  class="img1">
                                <h3 class="name2">小米全面屏电视65英寸 E65X </h3>
                                <p class="desc2">全面屏设计</p>
                                <p class="price2">2999元<del class="original">3299元</del></p>
                        </a>
                    </div>
                    <div class="items-1">
                        <a href="#">
                            <img src="../images/20d36fbaa18625e4fe507af31e4e9f83.jpg" alt="" class="img1">
                            <h3 class="name2">全面屏电视E43K  </h3>
                            <p class="desc2">全面屏设计，海量内容</p>
                            <p class="price2">1349元<del class="original">1500元</del></p>
                        </a>
                    </div>
                    <div class="items-1">
                        <a href="#">
                            <img src="../images/9d8674cd21c486feff5328772ab9cf01.jpg" alt="" class="img1">
                            <h3 class="name2">小小米电视4A 70英寸 </h3>
                            <p class="desc2">大屏更享受</p>
                            <p class="price2">3599元<del class="original">3900元</del></p>
                        </a>
                    </div>
                    <div class="items-1">
                        <a href="#">
                            <img src="../images/6bed167fc905bab57dee478bcf1e5e0d.JPG" alt="" class="img1">
                            <h3 class="name2">米家互联网对开门冰箱 540L </h3>
                            <p class="desc2">重磅新品福利特惠</p>
                            <p class="price2">2999元<del class="original">3600元</del></p>
                        </a>
                    </div>
                    <div class="items-2">
                        <a href="#">
                            <img src="../images/dfbdabe36b2d630d57a015e6fb5eb3ea.jpg" alt="">
                        </a>
                    </div>
                    <div class="items-1">
                        <a href="#">
                            <img src="../images/b8c63a2024528fe5410ebe669b7d2407.jpg" alt="" class="img1">
                            <h3 class="name2">Redmi全自动波轮洗衣机1A 8kg</h3>
                            <p class="desc2">一键操作，父母都爱用</p>
                            <p class="price2">849元<del class="original">899元</del></p>
                        </a>
                    </div>
                    <div class="items-1">
                        <a href="#">
                            <img src="../images/74e573c4c0d89048392d14831cc507d5.jpg" alt="" class="img1">
                            <h3 class="name2">Air 13.3" 2019款 </h3>
                            <p class="desc2">新一代独立显卡</p>
                            <p class="price2">6299元</p>
                        </a>
                    </div>
                    <div class="items-1">
                        <a href="#">
                            <img src="../images/7e5f89adf98ab3fccb34012b5209cd58.jpg" alt="" class="img1">
                            <h3 class="name2">米家互联网烟灶套装（天然气）</h3>
                            <p class="desc2">点火排烟，风随火动</p>
                            <p class="price2">2298元</p>
                        </a>
                    </div>
                    <div class="items-last">
                        <div>
                            <a href="#">
                                <img src="../images/1612c93ad4756215774a0dbec7a81bb2.jpg" alt="">
                                <h3 class="name2">米家电烤箱 </h3>
                                <p class="price2">279元</p>
                            </a>
                        </div>
                        <div>
                            <a href="#">
                                <div class="more">浏览更多
                                    <small>电视影音</small>
                                </div>
                                <i class="icontfont">&#xe619;</i>
                            </a>
                        </div>
                    </div>
                </div>
            </div>
         </div>
    </div>

WEB前端全系列/第一阶段：HTML5+CSS3模块/CSS3新特性 22541楼

public String nameValidate(){
    return null
}

这个方法里不用加参数吗？

可以这样写吗：

public String nameValidate(String name){
    this.name=name;
    return null;
}

JAVA 全系列/第二阶段：JAVA 基础深化和提高/智能电话本项目实战 22542楼

我的输入用户与密码都不能登陆

webdemo2.zip

JAVA 全系列/第六阶段：JavaWeb开发/Web实战案例 22543楼

(A+lamda*I)x里面的I是什么意思呢？

人工智能/第四阶段：人工智能基础-高等数学知识强化/线性代数高级 22544楼

使用@ControllerAdvice与@ExceptionHandler注解创建全局异常处理类处理异常，将更新用户的return "redirect:/ok" 改成 return "reidrect:/ok"（把redirect改成拼错的单词），用户更新后页面为什么会跳到error页面，而不是全局异常处理器里跳转的error2页面？？我试了空指针异常和算数异常是会跳到error1和error2页面的

    @RequestMapping("/updateUsers")
    public String updateUser(Users users){

        this.usersService.modifyUser(users);
        return "redirect:/ok";

全局异常处理器

package com.bjsxt.springbootmybatis.exception;

import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.servlet.ModelAndView;

/**
 * 全局异常处理器
 */
@ControllerAdvice
public class GlobalException {
    /**
     * 处理空指针异常
     */
    @ExceptionHandler(value = {java.lang.NullPointerException.class})
    public ModelAndView nullPointExceptionHandler(Exception e){
        ModelAndView modelAndView = new ModelAndView();
        modelAndView.addObject("err",e.toString());
        modelAndView.setViewName("error1");
        return modelAndView;
    }

    @ExceptionHandler(value = {java.lang.Exception.class})
    public ModelAndView ExceptionHandler(Exception e){
        ModelAndView modelAndView = new ModelAndView();
        modelAndView.addObject("err",e.toString());
        modelAndView.setViewName("error2");
        return modelAndView;

    }

}

JAVA 全系列/第九阶段：Spring Boot实战/Spring Boot 22545楼

同学您好