title: 'cx_Oracle.Cursor' object has no attribute 'numbersAsStrings' on Django
body: <p>I'm struggling with the error on title,</p>
  
  <p>I need to install cx_Oracle&lt;6 because of an incompatibility with Django_1.9.X</p>
  
  <p>I've tried everything I found in google; setting environment variables, reinstalling instantclient, I don't know what else to do.</p>
  
  <pre><code>  Running setup.py install for cx-Oracle ... error
      Complete output from command /Users/mmariscal/sourcetree/save_the_cau/venv1/bin/python -u -c "import setuptools, tokenize;__file__='/private/var/folders/w4/p5qt5g3143n99zm3gy_z79rh0000gp/T/pip-install-2JYYyQ/cx-Oracle/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /private/var/folders/w4/p5qt5g3143n99zm3gy_z79rh0000gp/T/pip-record-JvIl3W/install-record.txt --single-version-externally-managed --compile --install-headers /Users/mmariscal/sourcetree/save_the_cau/venv1/include/site/python2.7/cx-Oracle:
      running install
      running build
      running build_ext
      building 'cx_Oracle' extension
      creating build
      creating build/temp.macosx-10.13-intel-2.7-12c
      creating build/temp.macosx-10.13-intel-2.7-12c/src
      cc -fno-strict-aliasing -fno-common -dynamic -arch x86_64 -arch i386 -g -Os -pipe -fno-common -fno-strict-aliasing -fwrapv -DENABLE_DTRACE -DMACOSX -DNDEBUG -Wall -Wstrict-prototypes -Wshorten-64-to-32 -DNDEBUG -g -fwrapv -Os -Wall -Wstrict-prototypes -DENABLE_DTRACE -arch i386 -arch x86_64 -pipe -I/opt/instantclient_12_2 -I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c src/cx_Oracle.c -o build/temp.macosx-10.13-intel-2.7-12c/src/cx_Oracle.o -DBUILD_VERSION=5.3
      src/cx_Oracle.c:21:10: fatal error: 'oci.h' file not found
      #include &lt;oci.h&gt;
               ^~~~~~~
      1 error generated.
      error: command 'cc' failed with exit status 1
  
      ----------------------------------------
    Rolling back uninstall of cx-Oracle
  Command "/Users/mmariscal/sourcetree/save_the_cau/venv1/bin/python -u -c "import setuptools, tokenize;__file__='/private/var/folders/w4/p5qt5g3143n99zm3gy_z79rh0000gp/T/pip-install-2JYYyQ/cx-Oracle/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /private/var/folders/w4/p5qt5g3143n99zm3gy_z79rh0000gp/T/pip-record-JvIl3W/install-record.txt --single-version-externally-managed --compile --install-headers /Users/mmariscal/sourcetree/save_the_cau/venv1/include/site/python2.7/cx-Oracle" failed with error code 1 in /private/var/folders/w4/p5qt5g3143n99zm3gy_z79rh0000gp/T/pip-install-2JYYyQ/cx-Oracle/
  </code></pre>
  
  <p>Thanks</p>