{"id":27218,"library":"ovsdbapp","title":"ovsdbapp","description":"A library for creating OVSDB applications. Current version 2.17.0, released as part of OpenStack zed cycle. Follows OpenStack release cadence (approximately 6 months).","status":"active","version":"2.17.0","language":"python","source_language":"en","source_url":"https://opendev.org/openstack/ovsdbapp","tags":["ovsdb","openstack","ovs","networking"],"install":[{"cmd":"pip install ovsdbapp","lang":"bash","label":"Install from PyPI"}],"dependencies":[],"imports":[{"note":"Transaction is accessed via api.Transaction","wrong":"from ovsdbapp import Transaction","symbol":"Transaction","correct":"from ovsdbapp import api"},{"note":"vswitch module moved to backend.ovs_idl","wrong":"from ovsdbapp.vswitch import VswitchdInterface","symbol":"VswitchdInterface","correct":"from ovsdbapp.backend.ovs_idl import vswitch"}],"quickstart":{"code":"import os\nfrom ovsdbapp.backend.ovs_idl import connection\nfrom ovsdbapp import api\n\n    remote = os.environ.get('OVSDB_REMOTE', 'tcp:127.0.0.1:6640')\n    conn = connection.Connection(remote=remote)\n    idl = conn.start()\n    txn = api.Transaction(idl)\n    # Use txn for operations\n    print('OVSDB connection established')","lang":"python","description":"Initialize OVSDB connection and transaction."},"warnings":[{"fix":"Use from ovsdbapp.backend.ovs_idl import ...","message":"Top-level api and schema imports moved to backend.ovs_idl. Importing from ovsdbapp directly may fail.","severity":"breaking","affected_versions":">=2.0.0"},{"fix":"Update imports to backend.ovs_idl.api","message":"The ovsdbapp.api module is deprecated; use ovsdbapp.backend.ovs_idl.api instead.","severity":"deprecated","affected_versions":">=1.7.0"},{"fix":"Always call connection.start() to initialize the IDL.","message":"Connection.start() must be called before creating a transaction, otherwise IDL is None.","severity":"gotcha","affected_versions":"all"}],"env_vars":null,"last_verified":"2026-04-27T00:00:00.000Z","next_check":"2026-07-26T00:00:00.000Z","problems":[{"fix":"Use from ovsdbapp import api and then api.Transaction","cause":"Wrong import path; Transaction is inside ovsdbapp.api.","error":"ImportError: cannot import name 'Transaction' from 'ovsdbapp'"},{"fix":"Call connection.start() before creating transaction.","cause":"IDL not started before accessing transaction.","error":"AttributeError: 'NoneType' object has no attribute 'tables'"}],"ecosystem":"pypi","meta_description":null,"install_score":null,"install_tag":null,"quickstart_score":null,"quickstart_tag":null}