python 链接mysql 修改查询删除语句

import mysql.connector.pooling
 
config = {
    "host": "localhost",
    "port": 3306,
    "user": "root",
    "password": "",
    "database": "demo"
}
 
try:
    pool = mysql.connector.pooling.MySQLConnectionPool(
        **config,
        pool_size=10
    )
 
    con = pool.get_connection()
    con.start_transaction()
    cursor = con.cursor()
    #  复制表结构
    # sql= "create table t_emp_new like t_emp "
    # cursor.execute(sql)
 
    sql = "select avg(sal) as avg from t_emp"
    cursor.execute(sql)
    # 取一条记录
    temp = cursor.fetchone()
    # 平均底薪
    avg = temp[0]
 
    sql = " select deptno from t_emp group by deptno having avg(sal)> %s"
    cursor.execute(sql,[avg])
    # 取出所有记录
    temp = cursor.fetchall()
    # print(temp)
 
    # sql = "insert into t_emp_new select * from t_emp where deptno in ( "
    # for index in range(len(temp)):
    #     one = temp[index][0]
    #     if index  < len(temp) -1 :
    #        sql+= str(one)+ ","
    #     else:
    #         sql += str(one)
    # sql += ")"
    # # print(sql) insert into t_emp_new select * from t_emp where deptno in ( 10,20)
    # cursor.execute(sql)
 
    # sql = "delete from t_emp where deptno in ("
    # for index in range(len(temp)):
    #     one = temp[index][0]
    #     if index < len(temp)-1:
    #         sql += str(one)+ ","
    #     else:
    #         sql += str(one)
    # sql += " )"
    # # delete  from t_emp where    deptno in (10, 20)
    # # print(sql)
    # cursor.execute(sql)
 
    # 查询部门 编号
    sql = " select deptno from t_dept where dname = %s"
    cursor.execute(sql,['SALES'])
    deptno = cursor.fetchone()
    # print(deptno[0])  30
 
    sql = "update t_emp_new set deptno = %s"
    cursor.execute(sql,[deptno[0]])
 
    con.commit()
 
except Exception as e:
    print(e)
    if 'con' in dir():
        con.close()