Standard JSON

StandardJSON is a Python library that provides a JSON encoder aiming for full compliance with the ECMA-262 (JavaScript) and ECMA-404 (JSON Data Interchange) specifications. It extends Python's built-in `json.JSONEncoder` to natively serialize additional Python types such as `datetime.datetime`, `datetime.date`, `datetime.time`, and `decimal.Decimal` objects. The latest version is 0.3.1, released in May 2014, and the project appears to be unmaintained.