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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, recurring=values.unset, trigger_by=values.unset, usage_category=values.unset, page_token=values.unset, page_number=values.unset, page_size=values.unset):
 """ Retrieve a single page of TriggerInstance records from the API. Request is executed immediately :param TriggerInstance.Recurring recurring: The frequency of recurring UsageTriggers to read :param TriggerInstance.TriggerField trigger_by: The trigger field of the UsageTriggers to read :param TriggerInstance.UsageCategory usage_category: The usage category of the UsageTriggers to read :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 TriggerInstance :rtype: twilio.rest.api.v2010.account.usage.trigger.TriggerPage """

        params = values.of({
            'Recurring': recurring,
            'TriggerBy': trigger_by,
            'UsageCategory': usage_category,
            'PageToken': page_token,
            'Page': page_number,
            'PageSize': page_size,
        })

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

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