scrapy爬取百度新闻，参考网上回答修改Pipeline部分代码：

def process_item(self,item,spider):
    asynItem = copy.deepcopy(item)
    query=self.dbpool.runInteraction(self.do_insert,asynItem)
    query.addErrback(self.handle_error)

def handle_error(self,failure):
    print(failure)

def do_insert(self,cursor,item):
    check_sql = "select count(*) from `company_news_scrapy` where (`link`,`company_name`) =({},{})".format("'" + item['link'] + "'","'" + item['company_name'] + "'")
    cursor.execute(check_sql)
    rest = cursor.fetchall()
    if rest[0]['count(*)']==0:
        insert_sql = "insert into `company_news_scrapy`(`company_name`，`link`) values(%s,%s);"
        cursor.execute(insert_sql, (item['company_name']，item['link']))
        

仍然出现部分数据重复插入问题，求帮助。