def _deserialize_datetime(self, data):
        for key in data:
            if isinstance(data[key], dict):
                if data[key].get('type') == 'datetime':
                    data[key] = \
                        datetime.datetime.fromtimestamp(data[key]['value'])
        return data
Take any values coming in as a datetime and deserialize them
dataset/ETHPy150Open gmr/tinman/tinman/serializers.py/Serializer._deserialize_datetime