MongoDB 2.6 shipped a rewritten mongoexport that changed, in a backward breaking way, the MongoDB Extended JSON format for a number of BSON types. most notably BSON datetime (2.6 outputs $date in ISO-8601 format) and BSON int64 (now exported as $numberLong). There have been a number of other requests to make dumps configurable in other ways. See these tickets:

PYTHON-1103
PYTHON-767
Github PR-297
Github PR-295

This ticket tracks the addition of support to configure the output of json_util.dumps and loads. Things that should be configurable:

• support for ordereddict output in loads
• aware / naive datetimes in loads
• datetime in ISO-8601 format for dumps
• bson.int64.Int64 output to $numberlong for dumps
• UUID output to $binary and support for UUIDRepresentation in dumps and loads