python操作数据库

import pymysql,redis

def OpertioMsql(host,user,passwd,db,sql,port=3306,charset='utf8'):
    conn = pymysql.connect(host=host,user=user,passwd=passwd,port=port,db=db,charset=charset)   #建立链接
    cur = conn.cursor(cursor=pymysql.cursors.DictCursor)   #建立游标
    cur.execute(sql)      #执行sql

    if sql.startswith('select'):
        res = cur.fetchall()
    else:
        conn.commit()
        res = 88
    cur.close()
    conn.close()
    return res


def OpRedis(host,passwd,k,v=False,port=6379,db=0):
    r = redis.Redis(host=host,password=passwd,port=port,db=db)
    #连接数据库
    if v:#判断value是否传值，如果传了就说明是set方法
        r.set(k,v)
        res = 88
    else:
        res = r.get(k).decode()
        #因为从redis里面获取到数据都是字节类型的，要把它转成字符串
        #所以要用decode方法
    return res



if __name__ == '__main__':
    sql = 'select * from user;'
    sql2="insert into user(id, username, password) VALUES(3, 'test2', 123)"
    # s = OpertioMsql(host='10.0.1.82',user='byz',passwd='123456',db='byz',sql=sql)
    # print(s)

    s = OpRedis('211.149.218.16','123456','nhy:word',)
    print(s)