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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 page(self, category=values.unset, start_date=values.unset, end_date=values.unset, include_subaccounts=values.unset, page_token=values.unset, page_number=values.unset, page_size=values.unset):
 """ Retrieve a single page of DailyInstance records from the API. Request is executed immediately :param DailyInstance.Category category: The usage category of the UsageRecord resources to read :param date start_date: Only include usage that has occurred on or after this date :param date end_date: Only include usage that occurred on or before this date :param bool include_subaccounts: Whether to include usage from the master account and all its subaccounts :param str page_token: PageToken provided by the API :param int page_number: Page Number, this value is simply for client state :param int page_size: Number of records to return, defaults to 50 :returns: Page of DailyInstance :rtype: twilio.rest.api.v2010.account.usage.record.daily.DailyPage """

        params = values.of({
            'Category': category,
            'StartDate': serialize.iso8601_date(start_date),
            'EndDate': serialize.iso8601_date(end_date),
            'IncludeSubaccounts': include_subaccounts,
            'PageToken': page_token,
            'Page': page_number,
            'PageSize': page_size,
        })

        response = self._version.page(
            'GET',
            self._uri,
            params=params,
        )

        return DailyPage(self._version, response, self._solution)