The pyjson-tricks package brings several pieces of functionality to python
handling of json files:

* Store and load numpy arrays in human-readable format.
* Store and load class instances both generic and customized.
* Store and load date/times as a dictionary (including timezone).
* Preserve map order {} using OrderedDict.
* Allow for comments in json files by starting lines with #.
* Sets, complex numbers, Decimal, Fraction, enums, compression,
  duplicate keys, etc.

WWW: https://github.com/mverleg/pyjson_tricks