code: def update(self, campaign_id, area, nick=None):
          '''xxxxx.xxxxx.campaign.area.update
          ===================================
          更新一个推广计划的投放地域'''
          request = TOPRequest('xxxxx.xxxxx.campaign.area.update')
          request['campaign_id'] = campaign_id
          request['area'] = area
          if nick!=None: request['nick'] = nick
          self.create(self.execute(request), fields=['success','result','success','result_code','result_message'], models={'result':CampaignArea})
          return self.resulf update(self, campaign_id, area, nick=None):
          '''xxxxx.xxxxx.campaign.area.update
          ===================================
          更新一个推广计划的投放地域'''
          request = TOPRequest('xxxxx.xxxxx.campaign.area.update')
          request['campaign_id'] = campaign_id
          request['area'] = area
          if nick!=None: request['nick'] = nick
          self.create(self.execute(request), fields=['success','result','success','result_code','result_message'], models={'result':CampaignArea})
          return self.result
docs: xxxxx.xxxxx.campaign.area.update
          ===================================
          更新一个推广计划的投放地域