JSON Handling with datetime Support

While working on some ETL testing code, we needed to load some synthetic data to a database. At first we thought of using YAML for the synthetic data, but it was very slow so we decided to switch to JSON which is still readable but way faster (loading 183 records took 0.68sec with YAML vs 0.008sec in JSON).

However we needed support for serializing datetime objects. Here's dtjson, which support datetime objects in JSON serialization. You can use it almost a drop-in replacement for json: import dtjson as json.