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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 preview(self):
 """ Returns an HTML preview for a Scheduled Tweet. """

        if self.id:
            resource = self.PREVIEW
            resource = resource.format(account_id=self.account.id, id=self.id)
            response = Request(self.account.client, 'get', resource).perform()
            return response.body['data']