Stylized line drawing of mark playing the flute

Getting started with CherryPy

I mentioned briefly last week that I was getting started with CherryPy and how impressed I was with the ease of the install. I also finally figured out that Ubuntu has a psycopg package (python-psycopg), although I still couldn't get to work with it.

Here's a list of the packages that I had to install on my Ubuntu 9.0.4 server to get CherryPy running

apt-get install python

apt-get install python-setuptools

apt-get install flup

apt-get install postgres

apt-get install postgresql postgresql-client postgresql-contrib

apt-get install pgdb

apt-get install postgresql-python

apt-get install python-pygresql

apt-get install gcc

apt-get install g++

apt-get install postgresql-dev

apt-get install libpq-dev

apt-get install python-psycopg

Want to get a "Hello World" example of CherryPy working? It's incredible easy, especially if you use CherryPy's built-in webserver (which seems like it'll handle the sort of loads I'm going to be dealing with).

Here's the code:

import cherrypycherrypy.config.update( {'server.socket_host': '',                        'server.socket_port':  80,                        })class HelloWorld:        def index(self):            return "Hello World" = Truecherrypy.quickstart(HelloWorld())

Then, as root, run the following command to start the built-in webserver (assuming the code above is in the file /var/www/

python /var/www/

If all goes well, you should see something like this:

[16/Jun/2009:21:08:00] ENGINE Listening for SIGHUP.

[16/Jun/2009:21:08:00] ENGINE Listening for SIGTERM.

[16/Jun/2009:21:08:00] ENGINE Listening for SIGUSR1.

[16/Jun/2009:21:08:00] ENGINE Bus STARTING

Go to https://localhost in your browser and you should see the text "Hello World."

And here's a quick database example that connects to a PostgreSQL database called testdb with a single table called todo.

CREATE TABLE todo (    id integer NOT NULL,    title text,    created timestamp without time zone DEFAULT now(),    done boolean DEFAULT false);INSERT INTO todo (id, title, created, done) VALUES (1, 'Learn CherryPy', '2009-06-15 11:31:38.106307', false);
import cherrypyimport psycopgimport syscherrypy.config.update( {'server.socket_host': '',                        'server.socket_port':  80,                        })class HelloWorld:        def index(self):            conn = psycopg.connect('dbname=testdb', 'user=myuser', 'password=mypass')            mark = conn.cursor()            mark.execute('SELECT * FROM todo');            rec = mark.fetchall()            body = ''            for row in rec:                body += str(row)            return body = Truecherrypy.quickstart(HelloWorld())

That's a very basic intro to CherryPy. The complete documentation has lots of great stuff and I'll be back to write more about it after I've had a chance to write something real.