def get_query_param(self, key, default=None):
        value = self.get_query_params().get(key, None)
        if(value is None):
            return default
        return value[0]
Returns the request url query param for the given key, defaulting
dataset/ETHPy150Open jahlborn/appengine-rest-server/src/main/python/rest/__init__.py/Dispatcher.get_query_param