mac上安裝python3的cx_Oracle數據庫驅動

問題

使用Python3 for mac上面的cx_Oracle數據庫驅動

步驟

下載Oracle的Instant Client 程序包

Instant Client 下載適用於 Mac OS X (Intel x86)

這裏版本的選擇，應該根據你訪問的oracle庫的版原本選擇。

配置環境變量

ORACLE_HOME=/usr/local/oracle/instantclient_11_2
LD_LIBRARY_PATH=$ORACLE_HOME
VERSION=11.2.0.3.0
ARCH=x86_64
DYLD_LIBRARY_PATH=/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/clidriver/lib:$ORACLE_HOME
export ORACLE_HOME
export LD_LIBRARY_PATH
export VERSION
export ARCH
export DYLD_LIBRARY_PATH

**Note:**這裏的DYLD_LIBRARY_PATH須要留意，若是這裏配置失誤，會致使Python找不到相關庫，以下錯誤：

>>> import cx_Oracle
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: dlopen(/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/cx_Oracle.cpython-36m-darwin.so, 2): Library not loaded: /ade/b/2649109290/oracle/rdbms/lib/libclntsh.dylib.11.1
  Referenced from: /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/cx_Oracle.cpython-36m-darwin.so
  Reason: image not found

安裝Oracle的Instant Client 程序包

mkdir -p /usr/local/oracle/
cd /usr/local/oracle/
tar -xzf instantclient-basic-macos.x64-11.2.0.3.0.zip
tar -xzf instantclient-sdk-macos.x64-11.2.0.3.0.zip
cd instantclient_11_2
ln -s libclntsh.dylib.11.1 libclntsh.dylib
ln -s libocci.dylib.11.1 libocci.dylib

安裝cx_Oracle驅動

env ARCHFLAGS="-arch $ARCH" pip3 install cx_Oracle

檢查cx_Oracle驅動是否安裝成功

zylMBP:instantclient_11_2 zhangyalin$ python3
Python 3.6.1 (v3.6.1:69c0db5050, Mar 21 2017, 01:21:04) 
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import cx_Oracle
>>> exit()

若出現，以下狀況，則須要回頭檢查DYLD_LIBRARY_PATH環境變量：

zylMBP:instantclient_11_2 zhangyalin$ python3
Python 3.6.1 (v3.6.1:69c0db5050, Mar 21 2017, 01:21:04) 
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import cx_Oracle
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: dlopen(/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/cx_Oracle.cpython-36m-darwin.so, 2): Library not loaded: /ade/b/2649109290/oracle/rdbms/lib/libclntsh.dylib.11.1
  Referenced from: /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/cx_Oracle.cpython-36m-darwin.so
  Reason: image not found

總結

但願pip愈來愈好用，其實主要是我對Oracle和Python不熟悉，這裏的安裝須要事想配置好oracle的SDK纔可以比較順利的使用pip安裝oracle的驅動。

參考： Installing cx_Oracle for Python/ Mac OSX Install Oracle for Python on OSX.md