python连接mysql

1） 安装 

sudo apt-get install mysql-server
sudo apt-get install python-mysqldb

2） 使用

import MySQLdbdef get_db_connector():return MySQLdb.connect(host='localhost', user='root', passwd='changme', db='databaseName')def set_db_close(conn, cur):conn.commit()cur.close()conn.close()def query_one(query_str):try:conn = get_db_connector()cur = conn.cursor()cur.execute(query_str)record = cur.fetchone()set_db_close(conn, cur)return recordexcept MySQLdb.Error, e:conn.rollback()#若出错，可以回滚。print "Error %d: %s" % (e.args[0], e.args[1])def exist_username(username):#使用以上定义封装好的数据库操作的例子：query_str = "select id from user where name= '%s'" % username #name= %s is wrong!!!! it should be name= '%s'record = query_one(query_str)if record == None:return 0else :return 1