Python导入cx_Oracle报错

系统环境：RHEL5.4   python2.5（手动编译安装，系统带有2.4版本）

在使用python脚本访问数据库时，需要导入cx_Oracle模块    

$>>>import cx_Oracle

Traceback (most recent call last):

  File "/ghca/monitor/async_Msg_MQDis/run.py", line 2, in <module>

    import async_Msg_MQDis

  File "/ghca/monitor/async_Msg_MQDis/async_Msg_MQDis.py", line 1, in <module>

    import cx_Oracle

ImportError: No module named cx_Oracle

分析原因：

1、怀疑缺少模块包

[oracle@radius1 async_Msg_MQDis]$ rpm -qa|grep cx

cx_Oracle-5.1.2-1

发现已安装，查询包安装目录

[oracle@radius1 async_Msg_MQDis]$ rpm -ql cx_Oracle-5.1.2-1|less

/usr/lib64/python2.4/site-packages/cx_Oracle.so

/usr/share/doc/cx_Oracle-5.1.2

2、切换到模块目录下进行导入

$cd /usr/lib64/python2.4/site-packages

[oracle@radius1 site-packages]$ python

Python 2.5.2 (r252:60911, Apr 11 2013, 14:10:12) 

[GCC 4.1.2 20080704 (Red Hat 4.1.2-46)] on linux2

Type "help", "copyright", "credits" or "license" for more information.

>>> import cx_Oracle

Traceback (most recent call last):

  File "<stdin>", line 1, in <module>

ImportError: ./cx_Oracle.so: undefined symbol: PyUnicodeUCS4_Decode

>>> 

3、猜测可能是python版本与cx_Oracle对应版本不一致导入

[oracle@radius1 ~]$ ls /usr/bin/python2.4 

/usr/bin/python2.4

[oracle@radius1 ~]$ /usr/bin/python2.4

Python 2.4.3 (#1, Jun 11 2009, 14:09:37) 

[GCC 4.1.2 20080704 (Red Hat 4.1.2-44)] on linux2

Type "help", "copyright", "credits" or "license" for more information.

>>> import cx_Oracle

>>> 

导入成功

总结：中途也曾重新下载cx_Oracle-5.1.2-10g-py25-1.i386.rpm和cx_Oracle-5.1.2-10g-py25-1.x86_64.rpm进行尝试，均未导入成功，并且在安装了cx_Oracle*py25*.x86_64.rpm版本进行导入时报缺少“libpython2.5.so.1.0”库文件错误。在公司测试机上装有python2.6，其中 /usr/lib/libpython2.6.so.1.0 库文件属于python-libs-2.6.6-20.el6.i686包。