First create a client instance using the keystoneauth session API:

>>> from keystoneauth1 import loading
>>> from keystoneauth1 import session
>>> from nectarallocationclient import client
>>> loader = loading.get_plugin_loader('password')
>>> auth = loader.load_from_options(auth_url=AUTH_URL,
...                                 username=USERNAME,
...                                 password=PASSWORD,
...                                 project_name=PROJECT_NAME,
...                                 user_domain_id='default',
...                                 project_domain_id='default'
)
>>> sess = session.Session(auth=auth)
>>> nectar = client.Client(VERSION, session=sess)

Here VERSION can currently only be 1.

If you have PROJECT_ID instead of a PROJECT_NAME, use the project_id parameter. Similarly, if your cloud uses keystone v3 and you have a DOMAIN_NAME or DOMAIN_ID, provide it as user_domain_(name|id) and if you are using a PROJECT_NAME also provide the domain information as project_domain_(name|id).

nectarallocationclient adds 'python-nectarallocationclient' and its version to the user-agent string that keystoneauth produces. If you are creating an application using nectarallocationclient and want to register a name and version in the user-agent string, pass those to the Session:

>>> sess = session.Session(
...     auth=auth, app_name'nodepool', app_version'1.2.3')

If you are making a library that consumes nectarallocationclient but is not an end-user application, you can append a (name, version) tuple to the session's additional_user_agent property:

>>> sess = session.Session(auth=auth)
>>> sess.additional_user_agent.append(('shade', '1.2.3'))

For more information on this keystoneauth API, see Using Sessions.

Then call methods on its managers:

>>> nectar.allocations.list()
[<Allocation: 1 (my-cool-project)>]

>>> nectar.allocations.create("new-project",....)
<Allocation: 2 (new-project)>