- update to 3.10.1:
- Support for Client-Side Field Level Encryption with MongoDB 4.2. See
:doc:`examples/encryption` for examples.
- Support for Python 3.8.
- Added :attr:`pymongo.client_session.ClientSession.in_transaction`.
- Do not hold the Topology lock while creating connections in a MongoClient's
background thread. This change fixes a bug where application operations would
block while the background thread ensures that all server pools have
minPoolSize connections.
- Fix a UnicodeDecodeError bug when coercing a PyMongoError with a non-ascii
error message to unicode on Python 2.
- Fix an edge case bug where PyMongo could exceed the server's
maxMessageSizeBytes when generating a compressed bulk write command.