tornado and postgresql

But I don't want to use MySQL and trying to replace it with PG So I went ahead and modified like this :

define("port", default=8888, help="run on the given port", type=int)
define("pgsql_host", default="127.0.0.1:5432", help="blog database host")
define("pgsql_database", default="pgdb", help="blog database name")
define("pgsql_user", default="admin", help="blog database user")
define("pgsql_password", default="pgpass", help="blog database password")

and

        # Have one global connection to the blog DB across all handlers
    self.db = tornado.database.Connection(
        host=options.pgsql_host, database=options.pgsql_database,
        user=options.pgsql_user, password=options.pgsql_password)

But app just hangs when I run it, how to properly migrate it to PG?

Actually I get error after some time:

    Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/tornado-2.4.1-py2.7.egg/tornado/database.py", line 84, in __init__
    self.reconnect()
  File "/usr/local/lib/python2.7/dist-packages/tornado-2.4.1-py2.7.egg/tornado/database.py", line 101, in reconnect
    self._db = MySQLdb.connect(**self._db_args)
  File "/usr/lib/pymodules/python2.7/MySQLdb/__init__.py", line 81, in Connect
    return Connection(*args, **kwargs)
  File "/usr/lib/pymodules/python2.7/MySQLdb/connections.py", line 187, in __init__
    super(Connection, self).__init__(*args, **kwargs2)
OperationalError: (2013, "Lost connection to MySQL server at 'reading initial communication packet', system error: 0")

Why is it connecting to MySQL?

Solution

Are you sure you can use it with different RDBMS including PostgreSQL? It uses torndb package which is written to work with MySQL.

So i think that if you want to use it with PostgreSQL you should write your own torndb package for postgresql.

EDIT: As you can see at Tornado Wiki you have to have postgresql wrapper (momoko or psycopg) there are some links for further study.

EDIT2: Momoko description:
"An asynchronous Psycopg2 wrapper for Tornado."