code: def update(self, campaign_id, search_channels, nonsearch_channels, outside_discount, nick=None):
          '''xxxxx.xxxxx.campaign.platform.update
          ===================================
          取得一个推广计划的投放平台设置'''
          request = TOPRequest('xxxxx.xxxxx.campaign.platform.update')
          request['campaign_id'] = campaign_id
          request['search_channels'] = search_channels
          request['nonsearch_channels'] = nonsearch_channels
          request['outside_discount'] = outside_discount
          if nick!=None: request['nick'] = nick
          self.create(self.execute(request), fields=['success','result','success','result_code','result_message'], models={'result':CampaignPlatform})
          return self.resulf update(self, campaign_id, search_channels, nonsearch_channels, outside_discount, nick=None):
          '''xxxxx.xxxxx.campaign.platform.update
          ===================================
          取得一个推广计划的投放平台设置'''
          request = TOPRequest('xxxxx.xxxxx.campaign.platform.update')
          request['campaign_id'] = campaign_id
          request['search_channels'] = search_channels
          request['nonsearch_channels'] = nonsearch_channels
          request['outside_discount'] = outside_discount
          if nick!=None: request['nick'] = nick
          self.create(self.execute(request), fields=['success','result','success','result_code','result_message'], models={'result':CampaignPlatform})
          return self.result
docs: xxxxx.xxxxx.campaign.platform.update
          ===================================
          取得一个推广计划的投放平台设置