本文实例讲述了python安装oracle扩展及数据库连接方法。分享给大家供大家参考，具体如下：

下载：

cx_Oracle下载地址：cx-oracle.sourceforge.net/
instantclient-basic下载地址：www.oracle.com/technetwork/database/features/instant-client/index-097480.html

window环境：

python27 oracle10

需要软件：

cx_Oracle-5.1.2-10g.win32-py2.7.msi
instantclient-basic-win32-10.2.0.4.zip

1. 直接双击msi文件，即安装cx_Oracle；

2. 解压instantclient-basic-win32-10.2.0.4.zip，将得到的.dll文件全部拷贝到F:Python27Libsite-packages目录下

linux环境：

python26 orracle10

需要软件：

cx_Oracle-5.1.2-10g-py26-1.x86_64.rpm
basic-10.2.0.4.0-linux-x86_64.zip

1. rpm -ivh cx_Oracle-5.1.2-10g-py26-1.x86_64.rpm
2. （此处参考www.gxlcms.com/article/106295.htm）

设置环境变量

vi /root/.bash_profile

增加如下两行：

export ORACLE_HOME=/usr/local/instantclient_10_2
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$ORACLE_HOME

运行source /root/.bash_profile使改动生效

建立此链接库的符号链接

cd $ORACLE_HOME
ln -s libclntsh.so.x.x libclntsh.so

重新安装cx_Oracle

注意加--nodeps参数，否则还会报上述错误

[root@BJ-UPDATE-01 ~]# rpm -ivh --nodeps cx_Oracle-5.0.1-10g-py24-1.x86_64.rpm
#5.0.3版本不用加--nodeps参数

测试：

#Python
>>> import cx_Oracle
>>> db = cx_Oracle.connect('user/psw@114.242.113.91:1521/orcl')
>>> print db
<cx_Oracle.Connection to user@114.242.113.91:1521/orcl>
>>> cr=db.cursor()
>>> cr.execute("select * from LOGININFO")
<builtin.OracleCursor on <cx_Oracle.Connection to user@114.242.113.91:1521/orcl>>
>>> rs=cr.fetchall()
>>> print rs
[('40288a8542746fd90142746fdbb50001', 'cccccc', 1, 1, None, None, None), ('40288a85427474b601427474b8270001', 'eeee', 1, 1, None, None, None), ('40288a854273bce0014273bee6310002', 'dddddd', 0, 0, None, None, None), ('40288a854274532d014274532f600001', 'cccccc', 1, 1, None, None, None), ('40288a8542747c750142747c77ac0001', 'eeee', 1, 1, None, None, None), ('40288a8542744fb30142744fb5e90001', 'cccccc', 1, 1, None, None, None)]
>>>

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