import pickle
import json
from json import JSONEncoder
import datetime

class PythonObjectEncoder(JSONEncoder):

    def default(self, obj):
        if isinstance(obj, (datetime.datetime, datetime.date)):
            return obj.isoformat()
        elif isinstance(
            obj, (list, dict, str, unicode, int, float, bool, type, type(None))
        ):
            return JSONEncoder.default(self, obj)
        else:
            logging.warning(
                "Unable to find matching encoder for type %s. Using pickle",
                str(type(obj)),
            )
            return {"_python_object": pickle.dumps(obj)}

json.dumps(data, cls=PythonObjectEncoder, sort_keys=True)