Connect to an URI in postgres

Question

I'm guessing this is a pretty basic question, but I can't figure out why:

import psycopg2 psycopg2.connect("postgresql://postgres:postgres@localhost/postgres") 

Is giving the following error:

psycopg2.OperationalError: missing "=" after "postgresql://postgres:postgres@localhost/postgres" in connection info string 

Any idea? According to the docs about connection strings I believe it should work, however it only does like this:

psycopg2.connect("host=localhost user=postgres password=postgres dbname=postgres") 

I'm using the latest psycopg2 version on Python2.7.3 on Ubuntu12.04

Answer 1

I would use the urlparse module to parse the url and then use the result in the connection method. This way it's possible to overcome the psycop2 problem.

from urlparse import urlparse # for python 3+ use: from urllib.parse import urlparse result = urlparse("postgresql://postgres:postgres@localhost/postgres") username = result.username password = result.password database = result.path[1:] hostname = result.hostname port = result.port connection = psycopg2.connect(     database = database,     user = username,     password = password,     host = hostname,     port = port ) 

Answer 2

The connection string passed to psycopg2.connect is not parsed by psycopg2: it is passed verbatim to libpq. Support for connection URIs was added in PostgreSQL 9.2.