Python3.6连接Oracle数据库的方法详解

Python  /  管理员 发布于 7年前   193

本文实例讲述了Python3.6连接Oracle数据库的方法。分享给大家供大家参考，具体如下：

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 buildTraceback (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_1PATH=${ORACLE_HOME}/bin:$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 buildrunning buildrunning build_ext

后面输出信息省略

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

后面输出信息省略

按照完成之后，进行验证模块：

>>> import cx_OracleTraceback (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/libexport 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 linuxType "help", "copyright", "credits" or "license" for more information.>>> import cx_Oracle

#!/usr/bin/python#coding=utf8# import moduleimport cx_Oracle as oracle# connect oracle databasedb = oracle.connect('scott/redhat@192.168.223.138:1521/oracle.test')# create cursorcursor = db.cursor()# execute sqlcursor.execute('select sysdate from dual')# fetch datadata = cursor.fetchone()print('Database time:%s' % data)# close cursor and oraclecursor.close()db.close()

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

#!/usr/bin/python#coding=utf8import cx_Oracle as oracledef oraclesql(cursor):  fp = open(r'/home/oracle/scripts/tablespace.sql')  fp_sql = fp.read()  cursor.execute(fp_sql)  data = cursor.fetchall()  return dataif __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()

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