python的异常处理

不同版本的python处理方式略有不同：

python2.x：

import MySQLdbtry:    conn=MySQLdb.connect(host='localhost',port=3306,db='test1',user='root',passwd='mysql',charset='utf8')    cur=conn.cursor()    cur.execute('select * from students where id=7')    result=cur.fetchone()    print result    cur.close()    conn.close()except Exception,e:    print e.message

 
python3.x：

import pymysqltry:    conn=pymysql.connect(host='localhost',port=3306,db='test1',user='root',passwd='mysql',charset='utf8')    cur=conn.cursor()    cur.execute('select * from students where id=7')    result=cur.fetchone()    print result    cur.close()    conn.close()except Exception as e:    print(e.message)