Hi,
i think you’re mixing here two different things: Server and Client
The pyoclient is (as the name is saying) a client and doesn’t care about LDAP at all. There is no point to try to get the pyoclient to work with python-LDAP for the simple reason that it just connects to a server (namely ownCloud).
The client doesn’t do any authentication on its own. Thats the job of ownCloud which is using your mentioned PHP LDAP module.