public class Derby {
    public static final String DRIVER = "org.apache.derby.jdbc.EmbeddedDriver";
    public static final String JDBC_URL = "jdbc:derby:zadb;create=true";
    public static void main(String[] args) throws ClassNotFoundException, SQLException {
           Class.forName(DRIVER);
           Connection connection = DriverManager.getConnection(JDBC_URL);
           connection.createStatement().execute("create table channels(channel varchar(20),topic varchar(20), videoclip varchar(20))");
           connection.createStatement().execute("insert into channels values "
                   + "('oodp', 'creational', 'singleton'),"
                   + "('oodp', 'creational', 'factory method'),"
                   + "('oodp', 'creational', 'abstract factory')");
           
           System.out.println("Channels table created and records successfully inserted...");
           
    }       
}

public class QueryDB {
    public static final String SQL_STATEMENT = "select * from channels";
    public static void main(String[] args) throws SQLException {
        Connection connection = DriverManager.getConnection(Derby.JDBC_URL);
        Statement statement = connection.createStatement();
        ResultSet resultSet = statement.executeQuery(SQL_STATEMENT);
        ResultSetMetaData resultSetMetaData = resultSet.getMetaData();
        int columnCount = resultSetMetaData.getColumnCount();
        for (int x = 1; x <= columnCount; x++) System.out.format("%20s", resultSet.getString(x) + " | ");
        while (resultSet.next()){
            System.out.println("");
            for (int x = 1; x <= columnCount;x++) System.out.format("%20s", resultSet.getString(x) + " | ");
        }
        if (statement != null) statement.close();
        if (connection != null) connection.close();
    }
}

Exception in thread "main" java.sql.SQLException: Estado del cursor no válido: sin fila actual.
	at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)
	at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)
	at org.apache.derby.impl.jdbc.Util.generateCsSQLException(Unknown Source)
	at org.apache.derby.impl.jdbc.Util.generateCsSQLException(Unknown Source)
	at org.apache.derby.impl.jdbc.EmbedConnection.newSQLException(Unknown Source)
	at org.apache.derby.impl.jdbc.ConnectionChild.newSQLException(Unknown Source)
	at org.apache.derby.impl.jdbc.EmbedResultSet.checkOnRow(Unknown Source)
	at org.apache.derby.impl.jdbc.EmbedResultSet.getColumnType(Unknown Source)
	at org.apache.derby.impl.jdbc.EmbedResultSet.getString(Unknown Source)
	at derby.QueryDB.main(QueryDB.java:19)
Caused by: ERROR 24000: Estado del cursor no válido: sin fila actual.
	at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
	at org.apache.derby.impl.jdbc.SQLExceptionFactory.wrapArgsForTransportAcrossDRDA(Unknown Source)
	... 10 more
Java Result: 1

import os
import sys
sys.path = ['/var/www/testing'] + sys.path
os.environ['DJANGO_SETTINGS_MODULE'] = 'testing.settings'
import django.core.handlers.wsgi
application = django.core.handlers.wsgi.WSGIHandler()

<VirtualHost *:80>
WSGIScriptAlias / /var/www/testing/testing.wsgi

Servername test.com
Alias /static /var/www/testing/static/

<Directory /var/www/testing/>
Order allow,deny
Allow from all
</Directory>
</VirtualHost>

testing/
├── __init__.py
├── manage.py
├── public_html
│   └── index.html
└── testing
    ├── __init__.py
    ├── off.py
    ├── on.py
    ├── settings.py
    ├── test.wsgi
    ├── urls.py
    └── wsgi.py

<VirtualHost *:80>

        ServerName test.com
        ServerAlias www.test.com
        ServerAdmin webmaster@localhost
        DocumentRoot /var/www/testing/public_html/
        WSGIScriptAlias /var/www/testing/public_html /var/www/testing/testing/test.wsgi



        ErrorLog ${APACHE_LOG_DIR}/error.log
        CustomLog ${APACHE_LOG_DIR}/access.log combined


</VirtualHost>

import serial

a = serial.Serial('/dev/ttyACM0', 9600)
while 1 == 1:
               a.write(1)

<a href="ruta del python"><button>Encender</button></a>