using python_ldap for authentication

[tooper]

Hello all,

I'd like to use an ldap server just for authentication, but I'm a
complete beginner with all the ldap stuff...

I've tried this from the python_ldap Demo examples :

----------
import ldap, getpass

ldap_url="... validation ldap server URL & port ..."
l = ldap.initialize(ldap_url)

login_dn = "cn=thierry"
login_pw = getpass.getpass("Password for %s: " % login_dn)
l.simple_bind(login_dn, login_pw)
----------

but it seems to succeed whatever the password I'm providing :-(

How to simply assess the binding really occured ?
Do I need to start doing stuff with the "l" object to catch an error
and realize I'm not in fact connected : that's my current workaround
but I'm not very proud of it...

Thanks in advance !