code: def create(self, client_id, subject, name, from_name, from_email, reply_to, html_url,
                 text_url, list_ids, segment_ids):
          
          body = {
              "Subject": subject,
              "Name": name,
              "FromName": from_name,
              "FromEmail": from_email,
              "ReplyTo": reply_to,
              "HtmlUrl": html_url,
              "TextUrl": text_url,
              "ListIDs": list_ids,
              "SegmentIDs": segment_ids}
          response = self._post("/campaigns/%s.json" %
                                client_id, json.dumps(body))
          self.campaign_id = json_to_py(response)
          return self.campaign_id
docs: Creates a new campaign for a client.
  
          :param client_id: String representing the ID of the client for whom the
            campaign will be created.
          :param subject: String representing the subject of the campaign.
          :param name: String representing the name of the campaign.
          :param from_name: String representing the from name for the campaign.
          :param from_email: String representing the from address for the campaign.
          :param reply_to: String representing the reply-to address for the campaign.
          :param html_url: String representing the URL for the campaign HTML content.
          :param text_url: String representing the URL for the campaign text content.
            Note that text_url is optional and if None or an empty string, text
            content will be automatically generated from the HTML content.
          :param list_ids: Array of Strings representing the IDs of the lists to
            which the campaign will be sent.
          :param segment_ids: Array of Strings representing the IDs of the segments to
            which the campaign will be sent.
          :returns String representing the ID of the newly created campaign.