Format and return data appropriate to the requested API format.

        data: The data retured by the api request

def return_data(self, data, format=None):
        """Format and return data appropriate to the requested API format.

        data: The data retured by the api request

        """
        if format is None:
            format = self.format
        if format == "json":
            formatted_data = json.loads(data)
        else:
            formatted_data = data
        return formatted_data