Python學習--和 Oracle 互動

python 連接配接oracle 資料庫

1、安裝 cx_oracle

pip install cx_oracle

2、出現

  cx_Oracle.DatabaseError: DPI-1047: 64-bit Oracle Client library cannot be loaded: "dlopen(libclntsh.dylib, 1): image not found". See https://oracle.github.io/odpi/doc/installation.html#macos for help

錯誤時解決辦法：

去oracle官網下載下傳mac版的64bit的client basic 和client sdk

http://www.oracle.com/technetwork/topics/intel-macsoft-096467.html

編譯安裝：

sudo su #切換到root使用者

mkdir /Users/guanguan/oracle #建立oracle檔案

mv /Users/guanguan/Downloads/instantclient-* /Users/guanguan/oracle #将下載下傳的兩個Oracle包放到/Users/guanguan/oracle目錄下

cd /Users/guanguan/oracle 進入oracle檔案中

unzip instantclient-basic-macos.64-12.1.0.4.0.zip #解壓

unzip instantclient-sdk-macos.64-12.1.0.4.0.zip #解壓

cd instantclient_12_1/sdk

unzip ottclasses.zip

cd ..

cp -R ./sdk/* .

cp -R ./sdk/include .

ln -s libocci.dylib.12.1 libocci.dylib

ln -s libclntsh.dylib.12.1 libclntsh.dylib

更改環境變量：

vi ~/.bash_profile

export ORACLE_HOME=/Users/guanguan/oracle/instantclient_12_1

export DYLD_LIBRARY_PATH=$ORACLE_HOME

export LD_LIBRARY_PATH=$ORACLE_HOME

然後輸入source ~/.bash_profile 或者 . ~/.bash_profile使環境變量生效

5）測試環境變量是否生效

echo $ORACLE_HOME

/Users/guanguan/oracle/instantclient_12_1

6）然後解壓安裝cx_Oracle：

tar -zxvf cx_Oracle-5.2.1.tar.gz

cd cx_Oracle-5.2.1

python setup.py build

python setup.py install

7）測試cx_Oracle安裝是否成功

python

import cx_Oracle

#運作結果結果：

➜ ~ python Python 2.7.10 (default, Oct 23 2015, 19:19:21) [GCC 4.2.1 Compatible Apple LLVM 7.0.0 (clang-700.0.59.5)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> import cx_Oracle >>>

或者 python -c "import cx_Oracle"

➜ ~ python -c "import cx_Oracle" ➜ ~

此時說明已經安裝成功啦~

報錯資訊：

sh-3.2# python -c "import cx_Oracle" /Library/Python/2.7/site-packages/cx_Oracle-5.2.1-py2.7-macosx-10.11-intel.egg/cx_Oracle.py:3: UserWarning: Module cx_Oracle was already imported from /Library/Python/2.7/site-packages/cx_Oracle-5.2.1-py2.7-macosx-10.11-intel.egg/cx_Oracle.pyc, but /Users/guanguan/oracle/cx_Oracle-5.2.1 is being added to sys.path Traceback (most recent call last):File "", line 1, in File "build/bdist.macosx-10.11-intel/egg/cx_Oracle.py", line 7, in File "build/bdist.macosx-10.11-intel/egg/cx_Oracle.py", line 6, in __bootstrap__ ImportError: dlopen(/var/root/.python-eggs/cx_Oracle-5.2.1-py2.7-macosx-10.11-intel.egg-tmp/cx_Oracle.so, 2): Library not loaded: @rpath/libclntsh.dylib.12.1Referenced from: /var/root/.python-eggs/cx_Oracle-5.2.1-py2.7-macosx-10.11-intel.egg-tmp/cx_Oracle.soReason: image not found

解決方法：(删除之前安裝的cx_Oracle，設定export FORCE_RPATH=TRUE，重新安裝cx_Oracle)

sh-3.2# export FORCE_RPATH=TRUE sh-3.2# pip install cx_Oracle Requirement already satisfied: cx_Oracle in /Library/Python/2.7/site-packages/cx_Oracle-5.2.1-py2.7-macosx-10.11-intel.egg sh-3.2# cd /Library/Python/2.7/site-packages/ sh-3.2# rm -f cx_Oracle-5.2.1-py2.7-macosx-10.11-intel.egg sh-3.2# pip install cx_Oracle Collecting cx_OracleUsing cached cx_Oracle-5.2.1.tar.gz Installing collected packages: cx-OracleRunning setup.py install for cx-Oracle ... done Successfully installed cx-Oracle-5.2.1

sh-3.2# python Python 2.7.10 (default, Oct 23 2015, 19:19:21) [GCC 4.2.1 Compatible Apple LLVM 7.0.0 (clang-700.0.59.5)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> import cx_Oracle >>> exit()

==========================================

python對cx_Oracle的簡單操作：

#! /usr/bin/python

dsnStr = cx_Oracle.makedsn("127.0.0.1", "1521", "orcl")

conn = cx_Oracle.connect(user="test", password="test", dsn=dsnStr)

c=conn.cursor()

x=c.execute('select *from TEST.TEST p WHERE ID<2')

print (x.fetchone())

c.close()

conn.close() 

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