老师这四句话是什么意思，我理解不了，能讲一下吗

请问哪些是双标签哪些是单标签

from urllib.request import Request
from urllib.request import urlopen
from fake_useragent import UserAgent


url = "https://music.163.com/user/home?id=1320628122"
headers = {
        'User-Agent':UserAgent().random
        }

req = Request(url,headers=headers)
response = urlopen(req)
print(response.read().decode())

老师，我的代码和视频里一样，怎么报这个错了，编码用的是utf-8

为什么这里用的是that，它和this有什么区别吗？

已经解决了老师，我百度设置了自动下载jar包

public class TestThread extends Thread{
    public TestThread(){
        System.out.println(this.getName());
    }

    /**
     * 线程的线程体
     */
    @Override
    public void run() {
        System.out.println(this.getName()+"线程开始");
        for (int i=0;i<20;i++){
            System.out.println(this.getName()+""+i);
        }
        System.out.println(this.getName()+"线程结束");
    }

    public static void main(String[] args) {
        System.out.println("主线程开始");
        //实例化线程
        TestThread t1 =new TestThread();
        TestThread t2 =new TestThread();
        //启动线程
        t1.start();
        t2.start();
        System.out.println("主线程结束");
    }
}

主线程开始

Thread-0

Thread-1

主线程结束

Thread-0线程开始

Thread-1线程开始

Thread-00

Thread-10

Thread-01

Thread-11

Thread-02

Thread-12

Thread-03

Thread-13

Thread-04

Thread-14

Thread-15

Thread-16

Thread-17

Thread-18

Thread-19

Thread-110

Thread-111

Thread-112

Thread-05

Thread-113

Thread-06

Thread-114

Thread-07

Thread-115

Thread-08

Thread-116

Thread-09

Thread-117

Thread-010

Thread-118

Thread-011

Thread-119

Thread-012

Thread-013

Thread-014

Thread-015

Thread-016

Thread-017

Thread-018

Thread-019

Thread-0线程结束

Thread-1线程结束

老师  为什么我输出的代码不是按顺序的，代码很乱  类似交替？是不是就是前面讲的时间片轮询算法

#测试对象的浅拷贝、深拷贝
import copy

class MobilePhone:
    def __int__(self,cpu):
        self.cpu = cpu

class CPU:
    pass

c = CPU()
m = MobilePhone(c)

print("浅拷贝....")
m2 = copy.copy(m)   #浅拷贝。m2是m对象的一个拷贝对象
print("m:",id(m))
print("m2:",id(m2))
print("m中的cpu:",id(m.cpu))
print("m2中的cpu:",id(m2.cpu))

print("深拷贝....")
m3 = copy.deepcopy(m)   #深拷贝.
print("m:",id(m))
print("m3:",id(m3))
print("m中的cpu:",id(m.cpu))
print("m3中的cpu:",id(m3.cpu))

Traceback (most recent call last):

  File "G:\PyCharm：从入门到实践\入门115.py", line 12, in <module>

    m = MobilePhone(c)

TypeError: MobilePhone() takes no arguments

老师为什么我这不接受任何参数啊

这里synchronized的代码块根本运行不进去是什么原因呢老师

老师：

      你好， 这样的什么原因？

Traceback (most recent call last):

  File "C:\Programs\Python\Python38\lib\site-packages\tensorflow\python\pywrap_tensorflow.py", line 58, in <module>

    from tensorflow.python.pywrap_tensorflow_internal import *

  File "C:\Programs\Python\Python38\lib\site-packages\tensorflow\python\pywrap_tensorflow_internal.py", line 28, in <module>

    _pywrap_tensorflow_internal = swig_import_helper()

  File "C:\Programs\Python\Python38\lib\site-packages\tensorflow\python\pywrap_tensorflow_internal.py", line 24, in swig_import_helper

    _mod = imp.load_module('_pywrap_tensorflow_internal', fp, pathname, description)

  File "C:\Programs\Python\Python38\lib\imp.py", line 242, in load_module

    return load_dynamic(name, filename, file)

  File "C:\Programs\Python\Python38\lib\imp.py", line 342, in load_dynamic

    return _load(spec)

ImportError: DLL load failed while importing _pywrap_tensorflow_internal: 找不到指定的模块。

During handling of the above exception, another exception occurred:

Traceback (most recent call last):

  File "C:/Users/george/AppData/Local/Temp/tensorflow_loader.py", line 2, in <module>

    import tensorflow as tf

  File "C:\Programs\Python\Python38\lib\site-packages\tensorflow\__init__.py", line 41, in <module>

    from tensorflow.python.tools import module_util as _module_util

  File "C:\Programs\Python\Python38\lib\site-packages\tensorflow\python\__init__.py", line 50, in <module>

    from tensorflow.python import pywrap_tensorflow

  File "C:\Programs\Python\Python38\lib\site-packages\tensorflow\python\pywrap_tensorflow.py", line 69, in <module>

    raise ImportError(msg)

ImportError: Traceback (most recent call last):

  File "C:\Programs\Python\Python38\lib\site-packages\tensorflow\python\pywrap_tensorflow.py", line 58, in <module>

    from tensorflow.python.pywrap_tensorflow_internal import *

  File "C:\Programs\Python\Python38\lib\site-packages\tensorflow\python\pywrap_tensorflow_internal.py", line 28, in <module>

    _pywrap_tensorflow_internal = swig_import_helper()

  File "C:\Programs\Python\Python38\lib\site-packages\tensorflow\python\pywrap_tensorflow_internal.py", line 24, in swig_import_helper

    _mod = imp.load_module('_pywrap_tensorflow_internal', fp, pathname, description)

  File "C:\Programs\Python\Python38\lib\imp.py", line 242, in load_module

    return load_dynamic(name, filename, file)

  File "C:\Programs\Python\Python38\lib\imp.py", line 342, in load_dynamic

    return _load(spec)

ImportError: DLL load failed while importing _pywrap_tensorflow_internal: 找不到指定的模块。

Failed to load the native TensorFlow runtime.

See https://www.tensorflow.org/install/errors

for some common reasons and solutions.  Include the entire stack trace

above this error message when asking for help.

super().__init__(master), 
super(Application,self).init(master),
Frame.__init__(self,master)
这三个一样吗？

老师这个uni什么意思，是来做什么的?pri我知道是主键。

老师为什么出错

老师，我maven结合idea出现这个错误，配置的是阿里云的仓库

老师这个语句运行为什么报错，Navicat运行出错：1136 - Column count doesn't match value count at row 6

-- 创建雇员表

create table emp(

 empno int(4) primary key,

 ename varchar(10),

 job varchar(9),

 mgr int(4),

 hiredate date,

 sal decimal(7,2),

 comm decimal(7,2),

 deptno int(2)

);

-- 插入数据

insert into emp values

(7369,'Smith','clerk', 7902,'1980-12-17', 800, null, 20),

(7499,'Allen', 'salesman', 7698, '1981-02-20', 1600, 300, 30),

(7521, 'Ward','salesman', 7698,'1981-02-22', 1250,500, 30),

(7566,'Jones', 'manager', 7839, '1981-04-02', 2975,null, 20),

(7654,'Maritn', 'salesman', 7698, '1981-09-28', 1250, 1400,30),

(7698,'Blake''manager', 7839, '1981-05-01', 2850, null,30),

(7782,'Clark', 'manager', 7839,'1981-06-09', 2450, null, 10),

(7788,'Scott','analyst', 7566, '1987-04-19', 3000,null, 20),

(7839, 'King', 'president',null, '1981-11-17', 5000, null, 10),

(7844, 'Turner', 'salesman', 7698, '1981-09-08', 1500, 0, 30),

(7876,'Adams', 'clerk', 7788, '1987-05-23', 1100, null, 20),

(7900,'James', 'clerk', 7698, '1981-12-03', 950, null, 30),

(7902,'Ford', 'analyst', 7566, '1981-12-03', 3000, null, 20),

(7934,'Miller', 'clerk', 7782, '1982-01-23', 1300,null, 10);