python3.6连接oracle数据库

下载cx_Oracle模块模块：

https://pypi.python.org/pypi/cx_Oracle/5.2.1#downloads

这里下载的是源码进行安装

[root@oracle oracle]# tar xf cx_Oracle-5.2.1.tar.gz
[root@oracle oracle]# cd cx_Oracle-5.2.1

[root@oracle cx_Oracle-5.2.1]# python setup.py build
Traceback (most recent call last):
File "setup.py", line 170, in <module>
raise DistutilsSetupError("cannot locate an Oracle software " \
distutils.errors.DistutilsSetupError: cannot locate an Oracle software installation

报错解决办法：在root用户的.bash_profile文件中添加oracle_home的环境变量

export ORACLE_HOME=/u01/app/product/11.2.0/dbhome_1
PATH=${ORACLE_HOME}/bin:$PATH:$HOME/bin

[root@oracle cx_Oracle-5.2.1]# source /root/.bash_profile
[root@oracle cx_Oracle-5.2.1]# echo ${ORACLE_HOME}
/u01/app/product/11.2.0/dbhome_1

然后继续build：

[root@oracle cx_Oracle-5.2.1]# python setup.py build
running build
running build_ext

后面输出信息省略

[root@oracle cx_Oracle-5.2.1]# python setup.py install
running install
running bdist_egg

后面输出信息省略

按照完成之后，进行验证模块：

>>> import cx_Oracle
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: libclntsh.so.11.1: cannot open shared object file: No such file or directory

解决办法：在root用户的.bash_profile文件中添加LD_LIBRARY_PATH的环境变量

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

[root@oracle cx_Oracle-5.2.1]# source /root/.bash_profile

[root@oracle cx_Oracle-5.2.1]# python
Python 3.6.1 (default, Jul 13 2017, 14:31:18)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-17)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import cx_Oracle

#!/usr/bin/python
#coding=utf8

# import module
import cx_Oracle as oracle

# connect oracle database
db = oracle.connect('scott/redhat@192.168.223.138:1521/oracle.test')

# create cursor
cursor = db.cursor()

# execute sql
cursor.execute('select sysdate from dual')

# fetch data
data = cursor.fetchone()

print('Database time:%s' % data)

# close cursor and oracle
cursor.close()
db.close()

[oracle@oracle scripts]$ python connectoracle.py
Database time:2017-08-04 10:20:39

#!/usr/bin/python
#coding=utf8

import cx_Oracle as oracle

def oraclesql(cursor):
   fp = open(r'/home/oracle/scripts/tablespace.sql')
   fp_sql = fp.read()
   cursor.execute(fp_sql)
   data = cursor.fetchall()
   return data

if __name__ == '__main__':
   ipaddr = "192.168.223.138"
   username = "system"
   password = "redhat"
   oracle_port = "1521"
   oracle_service = "oracle.test"
   try:
      db = oracle.connect(username+"/"+password+"@"+ipaddr+":"+oracle_port+"/"+oracle_service)
    # 将异常捕捉，然后e就是抛异常的具体内容
   except Exception as e:
      print(e)
   else:
      cursor = db.cursor()
      data = oraclesql(cursor)
      for i in data:
         print(i)
      cursor.close()
      db.close()