1.環境設置

[root@oracle ~]# cat /etc/redhat-release

CentOS release 6.9 (Final)

[root@oracle ~]# python -V

Python 2.6.6

版本：Oracle 12c

2.前提：安裝cx_Oracle模塊依賴包

由於使用Python連接Oracle，所以需要下載oracle客戶端包

官網：http://www.oracle.com/technetwork/topics/linuxx86-64soft-092277.html?ssSourceSiteId=otncn

oracle-instantclient12.1-basic-12.1.0.2.0-1.x86_64.rpm

oracle-instantclient12.1-devel-12.1.0.2.0-1.x86_64.rpm

oracle-instantclient12.1-sqlplus-12.1.0.2.0-1.x86_64.rpm

[root@oracle ~]# rpm - ivh oracle-instantclient12.1-*

3.設置環境變量

[root@oracle ~]# cat ~/.bash_profile

export /usr/lib/oracle/12.1/client64/
export LD_LIBRARY_PATH=/usr/lib/oracle/12.1/client64/lib

4.安裝cx_Oracle模塊

官網：https://pypi.python.org/pypi/cx_Oracle

cx_Oracle-6.2.1.tar.gz

[root@oracle ~]# tar -zxvf cx_Oracle-6.2.1.tar.gz 
[root@oracle cx_Oracle-6.2.1]# python setup.py install

可能會遇到報錯

error: command 'gcc' failed with exit status 1

解決方法：

yum install python-devel

yum install libevent-devel

5.查看是否可以導入cx_Oracle模塊

[root@oracle ~]# python

Python 2.6.6 (r266:84292, Aug 18 2016, 15:13:37)

[GCC 4.4.7 20120313 (Red Hat 4.4.7-17)] on linux2

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

>>> import cx_Oracle

>>> #無報錯說明成功

6.編寫Python連接oracle數據庫腳本(oracle用戶，因為我這裏都是用oracle用戶權限安裝的）

[oracle@oracle ~]$ cat py_oracle.py

#!/usr/bin/env python
#-*- coding: UTF-8 -*-
import cx_Oracle  #導入模塊
db=cx_Oracle.connect('system/oracle@localhost:1521/ORCL')  #連接user/passwd@host:端口/instance
cursor = db.cursor() #創建遊標對象
cursor.execute('select sysdate from dual')  #執行命令
data = cursor.fetchone() #返回值
print('Database time:%s' % data)  打印輸出
cursor.close()  #關閉遊標對象
db.close()  #關閉數據庫

7.執行腳本

[oracle@oracle ~]$ python py_oracle.py

Database time:2018-03-20 20:47:59

Python 連接 Oracle數據庫