Sourced from pymongo's releases.

PyMongo 4.14.0

Community notes: https://www.mongodb.com/community/forums/t/pymongo-4-14-released/326906

Sourced from pymongo's changelog.

Changes in Version 4.14.0 (2025/08/06)

.. warning:: PyMongo 4.14 drops support for MongoDB 4.0. PyMongo now supports MongoDB 4.2+.

PyMongo 4.14 brings a number of changes including:

• Dropped support for MongoDB 4.0.

• Added preliminary support for Python 3.14 and 3.14 with free-threading. We do not yet support the following with Python 3.14:

  • Subinterpreters (concurrent.interpreters)
  • Free-threading with Encryption
  • mod_wsgi

• Removed experimental support for free-threading support in Python 3.13.

• Added :attr:bson.codec_options.TypeRegistry.codecs and :attr:bson.codec_options.TypeRegistry.fallback_encoder properties to allow users to directly access the type codecs and fallback encoder for a given :class:bson.codec_options.TypeRegistry.

• Added :meth:pymongo.asynchronous.mongo_client.AsyncMongoClient.append_metadata and :meth:pymongo.mongo_client.MongoClient.append_metadata to allow instantiated MongoClients to send client metadata on-demand

• Improved performance of selecting a server with the Primary selector.

• Introduces a minor breaking change. When encoding :class:bson.binary.BinaryVector, a ValueError will be raised if the 'padding' metadata field is < 0 or > 7, or non-zero for any type other than PACKED_BIT.

• Changed :meth:~pymongo.uri_parser.parse_uri's options return value to be type dict instead of _CaseInsensitiveDictionary.

• 6354d6c Prepare 4.14.0 release (#2458)
• d7074ba PYTHON-5454 & PYTHON-5455 Add preliminary python 3.14 support (#2451)
• d11cf20 Fix In-Use Encryption examples (#2457)
• baec1e0 Bump pyright from 1.1.392.post0 to 1.1.403 (#2455)
• 003ff56 Bump the actions group with 2 updates (#2454)
• cbe1b9e Update coverage requirement from <=7.5,>=5 to >=5,<=7.10.2 (#2453)
• 0249a08 Bump mypy from 1.14.1 to 1.17.1 (#2452)
• bfaab82 [Spec Resync] 07-28-2025 (#2447)
• 9f64dad PYTHON-5473 - Better test assertions for booleans (#2450)
• 9514a67 PYTHON-5441 - Unskip gridfs download chunk tests (#2449)
• Additional commits viewable in compare view

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot merge will merge this PR after your CI passes on it
• @dependabot squash and merge will squash and merge this PR after your CI passes on it
• @dependabot cancel merge will cancel a previously requested merge and block automerging
• @dependabot reopen will reopen this PR if it is closed
• @dependabot close will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
• @dependabot show <dependency name> ignore conditions will show all of the ignore conditions of the specified dependency
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)