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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 daily(self):
 """ Access the daily :returns: twilio.rest.api.v2010.account.usage.record.daily.DailyList :rtype: twilio.rest.api.v2010.account.usage.record.daily.DailyList """

        if self._daily is None:
            self._daily = DailyList(self._version, account_sid=self._solution['account_sid'], )
        return self._daily