Compile cx_Oracle for Maya & Python

I recently wanted to use cx_Oracle to connect to a database inside Maya. The problem is that cx_Oracle.pyd is compiled against an older version of Visual Studio than Maya is and that causes Maya to throw a dll error when you attempt to import cx_Oracle. The solution is to compile the source of cx_Oracle using Visual Studio 2010. The solution is also backwards compatible with vanilla Python 2.7.x.

Here are the steps I went through, followed by a link to the compiled pyd file.

1. Download the cx_Oracle source code from here. Direct link to the package I used (5.1.2)
2. Unzip so that you have the following path (C:/cx_Oracle-5.1.2)
3. I have the 64 bit Oracle SQL Developer Client installed to this path: C:/oracle/product/11.2.0/client_64bit
4. I have 64 bit Python 2.7 installed here: C:/Program Files/Python27
5. Download Oracle SDK for instant client from here I used. (12.1.0.1.0) – instantclient-sdk-windows.x64-12.1.0.1.0.zip
6. Unzip the SDK anywhere (Example C:/OracleSDK)
7. Create a folder inside your Oracle Client install called sdk. (Path in my case C:/oracle/product/11.2.0/client_64bit/sdk)
8. Copy the C:/OracleSDK/include DIRECTORY to the C:/oracle/product/11.2.0/client_64bit/sdk directory. You now have this path C:/oracle/product/11.2.0/client_64bit/sdk/include, which contains a bunch of header files.
9. Create a folder inside your Oracle Client install called oci/include. (Path in my case C:/oracle/product/11.2.0/client_64bit/oci/include)
10. Copy the contents of C:/OracleSDK/sdk/lib (2 directories) into C:/oracle/product/11.2.0/client_64bit/oci/include directory. You now have this path C:/oracle/product/11.2.0/client_64bit/oci/include/bc and C:/oracle/product/11.2.0/client_64bit/oci/include/msvc
11. Copy the lib files from C:/oracle/product/11.2.0/client_64bit/oci/include/msvc into your Python’s libs directory. In my case to here – C:/Program Files/Python27/libs
12. Open up a Visual Studio 2010 64 Command Prompt (Start -> All programs -> Microsoft Visual Studio 2010 -> Visual Studio Tools -> Visual Studio x64 Win64 Command Prompt (2010)
13. Run the following commands:

14. You will now have a C:/cx_Oracle-5.1.2/build/lib.win-amd64-2.7-11g/cx_Oracle.pyd.
15. To clean things up, I removed the lib files I copied to my Python install in step 9. I also removed the cx_Oracle.pyd from C:/Program Files/Python27/Lib/site-packages.
16. Put the cx_Oracle.pyd within your Python path, import cx_Oracle and connect to your data base. Happy DB-ing