有效沟通问答-【官方】百战程序员_IT在线教育培训机构

import time
def writelog(func):
    try:
        file=open("log.txt","a",encoding="utf-8") #a就是追加模式
        #写入相关数据信息（访问的函数名，访问的时间）
        file.write(func.__name__)
        file.write("\t") #添加一个制表符
        #写入访问时间
        file.write(time.asctime())
        file.write("\n")
    except Exception as e:
        print(e)
    finally:
        file.close()
def func1():
    writelog(func1)
    print("我是功能1")
def func2():
    writelog(func2)
    print("我是功能2")
func1()
func2()

老师代码当中那个func.__name__ 和 time.asctime() 这两个是什么意思可以解释一下吗

Python 全系列/第四阶段：函数式编程和核心特性/生成器和装饰器 23296楼

在idle中c与d的比较为什么会返回true?

Python 全系列/第一阶段：Python入门/编程基本概念 23297楼

问题1：对第9个图片上第三行文字进行绝对定位时，为什么设置left为0，文字是整体靠左对齐?设置left为92px时文字才处于相对居中位置，而前两行文字和第1，5个图片上所有文字均是设置left为0来实现文字整体居中的。

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box{
            width:100%;
            height:1155px;
        }
        .wrap{
            width:1240px;
            height:1155px;
            margin:0 auto;
        }
        /* 给img1，5，9的父元素设置相对定位 */
        .wrap-x{
            position:relative;
        }
        .wrap>div{
            width:303px;
            height:375px;
            float:left;
            margin-top:10px;
            margin-right:9px;
            background-color:gainsboro;
            /* 图片居中设置，用margin:0 auto;会和外边距设置冲突
            只显示水平居中，不显示外边距 */
            text-align:center;
        }
        .wrap>div:nth-child(4n){
            margin-right:0;
        }
        img{
            width:230px;
            height:230px;
        }
        .imgs{
            width:100%;
            height:100%;
        }
        /* 给img1，5，9上的文字进行绝对定位，使之出现在图片上 */
        .name{
            width:303px;
            height:31.33px;
            position:absolute;
            top:220px;
            left:0;
            color:#FFFFFF;
            font-size:21px;
            font-weight:700;
            margin-bottom:0;
        }
        .desc{
            width:303px;
            height:20.67px;
            position:absolute;
            top:260px;
            left:0;
            color:#ffffff;
            font-size:14px;
        }
        .price{
            width:82.06px;
            height:36px;
            position:absolute;
            top:280px;
            left:100px;
            color:#ebce6b;
            font-size:24px; 
            font-weight:700;
        }
        .original1{
            font-size:14px;
            font-weight:700;
            color:#ffffff;
            text-decoration:line-through;
            margin-left:4px;
        }
        .goods-name{
            width:303px;
            height:24px;
            color: #333333;
            font-size:16px;
            margin:0 0 2px;
        }
        .goods-desc{
            width:303px;
            height:20.67px;
            color:#999999;
            font-size:14px;
        }
        /* 为什么设置第三个P标记里的价格字体不生效?但P嵌套的span标记设置的字体却能生效？ */
        .goods-price{
            /* width:58.71px; */
            /* height:32.67px; */
            color:#CC0000;
            font-size:22px;
            padding:0 0 0 14px;
        }
        a{
            text-decoration:none;
        }
        span{
            width:14px;
            height:20.67px;
            color:#CC0000;
            font-size:14px;
            padding:0 0 0 0;
        }
        .original2{
            width:37.36px;
            height:15.33px;
            text-decoration:line-through;
            color:#666666;
            font-size:14px;
            margin-left:8px;
        }

    </style>
</head>
<body>
    <div class="box">
        <div class="wrap">
          <div class="wrap-x"><a href="#">
              <img src="../images/img1.jpg" class="imgs" alt="">
              <p class="name">魅族 EP3C 耳机</p>
              <p class="desc">【限时特惠99元】</p>
              <p class="price">￥99<span class="original1">￥120</span></p>
          </a></div>
          <div class="wrap-x"><a href="#">
              <img src="../images/img2.png" alt="">
             <p class="goods-name">魅族 POP Pro 主动降噪耳机</p>
             <p class="goods-desc">三重混合主动降噪技术 | 三麦克风智能通话降噪</p>
             <p class="goods-price"><span>￥</span>499</p>
          </a></div>
          <div class="wrap-x"><a href="#">
              <img src="../images/img3.png" alt="">
              <p class="goods-name">魅族 POP2s 真无线耳机</p>
              <p class="goods-desc">【限时3期免息】好声音标杆 | Flyme 妙连</p>
              <p class="goods-price"><span>￥</span>299</p>
          </a></div>
          <div class="wrap-x"><a href="#">
              <img src="../images/img4.png" alt="">
              <p class="goods-name">魅族 EP63NC 无线降噪耳机</p>
              <p class="goods-desc">【限时特惠249元+3期免息】</p>
              <p class="goods-price"><span>￥</span>249<span class="original2">￥499</span></p>
          </a></div>
          <div class="wrap-x"><a href="#">
              <img src="../images/img5.jpg" class="imgs" alt="">
              <p class="name">魅族 HD60 头戴式蓝牙耳机</p>
              <p class="desc">【限时特惠329元+3期免息】</p>
              <p class="price">￥329<span class="original1">￥499</span></p>
          </a></div>
          <div class="wrap-x"><a href="#">
              <img src="../images/img6.png" alt="">
              <p class="goods-name">魅族 HD60 降噪耳机</p>
              <p class="goods-desc">【限时特惠799元+12期免息】</p>
              <p class="goods-price"><span>￥</span>799<span class="original2">￥1099</span></p>
          </a></div>
          <div class="wrap-x"><a href="#">
              <img src="../images/img7.png" alt="">
              <p class="goods-name">魅族 POP2 真无线蓝牙耳机</p>
              <p class="goods-desc">【限时特惠249元】</p>
              <p class="goods-price"><span>￥</span>249<span class="original2">￥399</span></p>
          </a></div>
          <div class="wrap-x"><a href="#">
              <img src="../images/img8.png" alt="">
              <p class="goods-name">魅族 HIFI 解码耳放</p>
              <p class="goods-desc">【限时特惠149元】</p>
              <p class="goods-price"><span>￥</span>149<span class="original2">￥169</span></p>
          </a></div>
          <div class="wrap-x"><a href="#">
              <img src="../images/img9.jpg" class="imgs" alt="">
              <p class="name">MEIZU UR 高端定制耳机 预约</p>
              <p class="desc">【预约专用】私人定制，为你而声</p>
              <p class="price">￥200</p>
          </a></div>
          <div class="wrap-x"><a href="#">
              <img src="../images/img10.png" alt="">
              <p class="goods-name">MEIZU UR LIVE 特调版</p>
              <p class="goods-desc">手工定制公模 ｜ 楼氏定制四单元动铁</p>
              <p class="goods-price"><span>￥</span>1299</p>
          </a></div>
          <div class="wrap-x"><a href="#">
              <img src="../images/img11.png" alt="">
              <p class="goods-name">POP 真无线蓝牙耳机</p>
              <p class="goods-desc">【限时特惠299元】</p>
              <p class="goods-price"><span>￥</span>299<span class="original2">￥499</span></p>
          </a></div>
          <div class="wrap-x"><a href="#">
              <img src="../images/img12.png" alt="">
              <p class="goods-name">魅族 EP2X 耳机</p>
              <p class="goods-desc">一体式线控 | 3.5mm接口 | 流线设计</p>
              <p class="goods-price"><span>￥</span>69<span class="original2">￥129</span></p>
          </a></div>
       </div>
    </div>
</body>
</html>

WEB前端全系列/第一阶段：HTML5+CSS3模块/初识CSS 23298楼

老师，为什么课上老师用long的时候后面没加L呢？

JAVA 全系列/第一阶段：JAVA 快速入门/变量、数据类型、运算符 23299楼

from threading import Thread
from time import sleep
# 线程的实现
# 方法包装

# 创建普通方法
def func1(name):
    print(f"Threading:{name} start")
    sleep(3)
# 创建线程
#t1=Thread(target=func1,args=("t1",))
#t2=Thread(target=func1,args=("t2",))

t1=Thread(target=func1("t1",))
t2=Thread(target=func1("t2",))

# 开启线程
t1.start()
t2.start()
#func1("t1")
#func1("t2")

请问一下为什么同样用Thread方法, 后面加args的就可以实现多线程, 我把args放进func1里面就变单线程了?

Python 全系列/第三阶段：Python 网络与并发编程/并发编程 23300楼

老师，这是我的settings.xml文件，是按照视频的步骤走的呀

JAVA 全系列/第八阶段：Linux入门到实战/Maven 23301楼

出错了，咋搞，网络上搜不到信息，怎么解决这个问题？

Python 全系列/第二阶段：Python 深入与提高/模块 23302楼

//服务端代码
import java.io.IOException;
import java.io.PrintWriter;
import java.net.Socket;

public class BasicSocketClient {
    public static void main(String[] args) {
        Socket socket=null;
        PrintWriter pw=null;

        try {
            //创建Socket对象，两个参数：1.服务端的IP地址，2.服务端所监听的端口
            socket =new Socket("127.0.0.1",8888);
            pw.println("服务端 你好");
            pw.flush();

        } catch (IOException e) {
            e.printStackTrace();
        }finally{
            if (pw!=null){
                pw.close();
            }
            if (socket!=null){
                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }

    }
}
//客户端代码

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.ServerSocket;
import java.net.Socket;

public class BasicSocketServer {
    public static void main(String[] args) {
        Socket socket=null;
        BufferedReader br=null;
        try {
            ServerSocket serverSocket=new ServerSocket(8888);
            System.out.println("服务器启动等待监听。。");
            //启动服务器监听
            socket= serverSocket.accept();
            //读取客户端发送的消息
            br= new BufferedReader(new InputStreamReader(socket.getInputStream()));
            System.out.println(br.readLine());
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            if (br!=null){
                try {
                    br.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (socket!=null){
                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }


    }
}
为啥我的结果报错，服务端输出null

JAVA 全系列/第二阶段：JAVA 基础深化和提高/网络编程（旧） 23303楼

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-deploy-plugin:2.7:deploy (default-deploy) on project nexusdemo: Failed to retrieve remote metadata com.yzy:nexusdemo:1.0-SNAPSHOT/maven-metadata.xml: Could not transfer metadata com.yzy:nexusdemo:1.0-SNAPSHOT/maven-metadata.xml from/to snapshots (http://192.168.10.130:8081/nexus/content/repositories/snaps hots/): Illegal character in path at index 59: http://192.168.10.130:8081/nexus/content/repositories/snaps hots/com/yzy/nexusdemo/1.0-SNAPSHOT/maven-metadata.xml -> [Help 1]

[ERROR]

[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.

[ERROR] Re-run Maven using the -X switch to enable full debug logging.

[ERROR]

[ERROR] For more information about the errors and possible solutions, please read the following articles:

[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

Process finished with exit code 1

老师，报的这个错误找不出来原因？请老师解答

JAVA 全系列/第八阶段：Linux入门到实战/Maven 23304楼

老师，调试文件保存目录是不是出了问题。