python中pymysql的executemany使用方式_python

sql="insert into tablename (id,name) values (%s,%s)"

values=[(1,"zhangsan"),(2,"lisi")]
#或者
values=((1,"zhangsan"),(2,"lisi"))

cursor.executemany(sql,values) 

list = []
for x in xinghao_items:
   
    values = (str(x).replace('nan',''))
    list.append(values)
    num = num + 1
    if num == 500000:
        sql = "insert into t_mlcc(part_number)values('%s')"
        cursor.executemany(sql.replace('\'',''),list)
        db.commit()
        # 执行sql语句
        print("============" + time.strftime('%Y-%m-%d %H:%M:%S') + "=====insert ok=====")
        num = 0  # 计数归零
        list.clear()  # 清空list