Python3.6連線Oracle資料庫的方法詳解

阿新 • • 發佈：2020-01-09

本文例項講述了Python3.6連線Oracle資料庫的方法。分享給大家供大家參考，具體如下：

下載cx_Oracle模組模組：

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

這裡下載的是原始碼進行安裝

[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

報錯解決辦法：在root使用者的.bash_profile檔案中新增oracle_home的環境變數

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

然後繼續build：

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

後面輸出資訊省略

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

後面輸出資訊省略

按照完成之後，進行驗證模組：

>>> 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

解決辦法：在root使用者的.bash_profile檔案中新增LD_LIBRARY_PATH的環境變數

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/[email protected]: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)
  # 將異常捕捉，然後e就是拋異常的具體內容
  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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希望本文所述對大家Python程式設計有所幫助。