txpostgres connection function (With automatic reconnect)

connect.py

from psycopg2.extras import DictCursor
from txpostgres import txpostgres
from txpostgres.reconnection import DeadConnectionDetector

def db_pool_from_config(config):
    """
    Create a connection pool.  Returns a deferred that will fire when the
    connection pool is ready.

    """
    def connection_factory(self, *args, **kwargs):
        kwargs['detector'] = DeadConnectionDetector()
        return txpostgres.Connection(*args, **kwargs)

    txpostgres.ConnectionPool.connectionFactory = connection_factory
    return txpostgres.ConnectionPool(
        None,
        database=config.get('database'),
        user=config.get('user'),
        password=config.get('password'),
        host=config.get('host'),
        cursor_factory=DictCursor,
        min=config.get('num_conn', 5),
    ).start()