>>> dir(keystone)
['__abstractmethods__', '__class__', '__delattr__', '__dict__', '__doc__', '__format__', '__getattr__', '__getattribute__', '__hash__', '__init__', '__module__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', '__weakref__', '_abc_cache', '_abc_negative_cache', '_abc_negative_cache_version', '_abc_registry', '_auth_token', '_build_keyring_key', '_cs_request', '_decode_body', '_endpoint', '_management_url', '_process_management_url', 'auth_ref', 'auth_token', 'auth_token_from_user', 'auth_url', 'authenticate', 'credentials', 'debug_log', 'delete', 'deprecated_session_variables', 'domain', 'domain_id', 'domain_name', 'domains', 'endpoint_filter', 'endpoints', 'federation', 'force_new_token', 'get', 'get_auth_ref_from_keyring', 'get_endpoint', 'get_options', 'get_raw_token_from_identity_service', 'get_token', 'groups', 'has_service_catalog', 'head', 'invalidate', 'load_from_options', 'management_url', 'oauth1', 'password', 'patch', 'policies', 'post', 'process_token', 'project_domain_id', 'project_domain_name', 'project_id', 'project_name', 'projects', 'put', 'region_name', 'regions', 'request', 'role_assignments', 'roles', 'serialize', 'service_catalog', 'services', 'session', 'stale_duration', 'store_auth_ref_into_keyring', 'tenant_id', 'tenant_name', 'trust_id', 'trusts', 'use_keyring', 'user_domain_id', 'user_domain_name', 'user_id', 'username', 'users', 'version']