class Person:
    def __int__(self,name,age):
        print("创建Person")
        self.name=name
        self.age=age
    def say_age(self):
        print("{0}的年龄{1}".format(self.name,self.age))

class Student(Person):
    pass
s1=Student("高淇",18)

s1.say_age()

报错了

老师    视频里面没说的去除中间的空行  是怎么弄得

老师为什么这里的添加列表那里，创建变量是要用self.list而不是就list,这里不明白，是因为就是不仅在这个方法中用到它，而在其它方法中也会用到？？？？？？？？？？？？？？？？？？？？？？

cities这一段没理解

老师注册的密码为什么自动变成了加密的呢？这个具体调度流程是怎样的啊

TestBoolean {
    (String[] args){
        aa=bb=(aa){
            System..println()}{
            System..println()}

        (bb){
            System..println()}{
            System..println()}
    }
}

老师请问构造器和Javabean分别再什么情况下用呢，有啥区别

老师，为什么这个只有一个客户端有反应，

老师想问一下a与b完全没有交集的时候，差集会失败吗，会返回false吗

老师 statsmodels中有空值该如何处理呢？

老师，没什么，我的电脑运行embed标签，音频和视频不自动播放啊？

老师好，能够找到项目的所在目录和.java文件，下载了给的反编译工具想试试，.class文件怎么找

老师，这个选什么呀

老师，数据库服务已启动，还是运行报错

"C:\Program Files\Java\jdk1.8.0_201\bin\java.exe" -agentlib:jdwp=transport=dt_socket,address=127.0.0.1:60083,suspend=y,server=n -javaagent:C:\Users\Freem\.IntelliJIdea2019.1\system\captureAgent\debugger-agent.jar -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_201\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\rt.jar;D:\workspace\jdbcDemo\out\production\jdbcDemo;D:\workspace\jdbcDemo\lib\mysql-connector-java-5.1.47.jar;D:\program files\JetBrains\IntelliJ IDEA 2019.1\lib\idea_rt.jar" com.bjsxt.JdbcTest

Connected to the target VM, address: '127.0.0.1:60083', transport: 'socket'

Tue Nov 05 19:37:11 CST 2019 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.

java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:965)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3978)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3914)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:871)

at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1714)

at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1224)

at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2199)

at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2230)

at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2025)

at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:778)

at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

at java.lang.reflect.Constructor.newInstance(Constructor.java:423)

at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)

at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:386)

at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:330)

at java.sql.DriverManager.getConnection(DriverManager.java:664)

at java.sql.DriverManager.getConnection(DriverManager.java:247)

at com.bjsxt.JdbcTest.insertDepartments(JdbcTest.java:16)

at com.bjsxt.JdbcTest.main(JdbcTest.java:45)

Disconnected from the target VM, address: '127.0.0.1:60083', transport: 'socket'

Process finished with exit code 0