def _user_yes_no_query(self, question):
        """ Helper asking if the user want to download the file

        Note:
            Dowloading huge file can take a while

        """
        sys.stdout.write('%s [y/n]\n' % question)
        while True:
            try:
                return strtobool(raw_input().lower())
            except ValueError:
                sys.stdout.write('Please respond with \'y\' or \'n\'.\n')
Helper asking if the user want to download the file

        Note:
            Dowloading huge file can take a while