code: def update_delisting(self, num_iid, session):
          '''taobao.item.update.delisting 商品下架
          
          单个商品下架 
          输入的num_iid必须属于当前会话用户'''
          request = TOPRequest('taobao.item.update.delisting')
          request['num_iid'] = num_iid
          self.create(self.execute(request, session)['item'])
          return self update_delisting(self, num_iid, session):
          '''taobao.item.update.delisting 商品下架
          
          单个商品下架 
          输入的num_iid必须属于当前会话用户'''
          request = TOPRequest('taobao.item.update.delisting')
          request['num_iid'] = num_iid
          self.create(self.execute(request, session)['item'])
          return self
docs: taobao.item.update.delisting 商品下架
          
          单个商品下架 
          输入的num_iid必须属于当前会话用户