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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def time(self):
 """Retrieve the current time from the redis server. :rtype: float :raises: :exc:`~tredis.exceptions.RedisError` """


        def format_response(value):
            """Format a TIME response into a datetime.datetime

            :param list value: TIME response is a list of the number
                of seconds since the epoch and the number of micros
                as two byte strings
            :rtype: float

            """
            seconds, micros = value
            return float(seconds) + (float(micros) / 1000000.0)

        return self._execute([b'TIME'], format_callback=format_response)