- update to 4.2.0:
- Support for MongoDB 6.0.
- Support for the Queryable Encryption beta with MongoDB 6.0. Note that backwards-breaking
changes may be made before the final release. See :ref:`automatic-queryable-client-side-encryption` for example usage.
- Provisional (beta) support for :func:`pymongo.timeout` to apply a single timeout
to an entire block of pymongo operations.
- Added the ``timeoutMS`` URI and keyword argument to :class:`~pymongo.mongo_client.MongoClient`.
- Added the :attr:`pymongo.errors.PyMongoError.timeout` property which is ``True`` when
the error was caused by a timeout.
- Added the ``check_exists`` argument to :meth:`~pymongo.database.Database.create_collection`
that when True (the default) runs an additional ``listCollections`` command to verify that the
collection does not exist already.
- Added key management APIs to :class:`~pymongo.encryption.ClientEncryption`:
- Support for the ``crypt_shared`` library to replace ``mongocryptd`` using the new
``crypt_shared_lib_path`` and ``crypt_shared_lib_required`` arguments to
:class:`~pymongo.encryption_options.AutoEncryptionOpts`.
- Fixed a bug where :meth:`~pymongo.collection.Collection.estimated_document_count`
would fail with a "CommandNotSupportedOnView" error on views (`PYTHON-2885`_).
- Fixed a bug where invalid UTF-8 strings could be passed as patterns for :class:`~bson.regex.Regex`
objects. :func:`bson.encode` now correctly raises :class:`bson.errors.InvalidStringData` (`PYTHON-3048`_).
- Fixed a bug that caused ``AutoReconnect("connection pool paused")`` errors in the child
process after fork (`PYTHON-3257`_).
- Fixed a bug where :meth:`~pymongo.collection.Collection.count_documents` and
:meth:`~pymongo.collection.Collection.distinct` would fail in a transaction with
``directConnection=True`` (`PYTHON-3333`_).
- GridFS no longer uploads an incomplete files collection document after encountering an
error in the middle of an upload fork. This results in fewer
:class:`~gridfs.errors.CorruptGridFile` errors (`PYTHON-1552`_).
- Renamed PyMongo's internal C extension methods to avoid crashing due to name conflicts
with mpi4py and other shared libraries (`PYTHON-2110`_).