Re: Stuck at "Python version 3.5 required, which was not found in the registry."

Hi Greg,

I'm not sure why you are experiencing those issues....but apparently you
are not alone. Others have experienced such issues when attempting to
install 32-bit stuff on 64-bit Windows machines. You may wish to install
64-bit Python as well -- it may make it happier. :-) Once you have
everything you want you can always uninstall the 64-bit version -- assuming
that an upgrade to 64-bit is completely out of the works, of course! And if
it puts it in the wrong place, you can always move cx_Oracle.pyd to the
right place. That is the only file that really matters anyway.

Regarding the issue of vcvarsall.bat -- my guess is you have to run the
special command prompt that Microsoft provides that sets the environment
correctly....or set your environment correctly yourself. :-)

Failing that, you can send me an e-mail and I can reply with the .pyd file
directly (suitably renamed, of course, to get around the "security"
employed by Windows).

On Tue, Feb 16, 2016 at 9:33 AM, Tipps, Greg (Greg Tipps) <[email protected]>
wrote:

> Hello cx_Oracle users,
>
>
>
> I have a 64-bit Windows Server 2012 R2 box that is running 32-bit Python
> 2.7.4 and uses cx_Oracle to connect to an Oracle 11g database, and I am
> trying to upgrade to 32-bit Python 3.5.
>
>
>
> For Python 2.7.4 I was able to use the PyPi .exe installer (page link:
> https://pypi.python.org/pypi/cx_Oracle/), but the Python 3.5 installer
> (cx_Oracle-5.2.1-11g.win32-py3.5.exe) always gives me this error: “Python
> version 3.5 required, which was not found in the registry."
>
>
>
> Some Googling of that led me to a blog post (link:
> http://codeyarns.com/2012/04/28/python-version-not-found-in-registry-error/)
> where the author was able to get around this error by creating some new
> registry keys- It turned out that in their case, the module was looking for
> some values under HKEY_CURRENT_USER\SOFTWARE\Python\PythonCore\3.2 , and
>  those values were actually written by the Python installer at
> HKEY_LOCAL_MACHINE\SOFTWARE\Python\PythonCore\3.2. They were able to
> export the HKLM values, edit the .reg file, then import them into HKCU, and
> successfully install the module.
>
>
>
> I noticed that in my case, since I am working with 32-bit Python on a
> 64-bit system, those keys were written at
> HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Python\PythonCore\3.2, so I tried
> exporting the Wow6432Node\Python key and importing it in these three
> locations:
>
> HKEY_CURRENT_USER\SOFTWARE\Python
>
> HKEY_CURRENT_USER\SOFTWARE\Python\Wow6432Node
>
> HKEY_LOCAL_MACHINE\SOFTWARE\Python
>
>
>
> I rebooted the server after making these changes and ran the installer
> again, and was still met with the “Python version 3.5 required” error. I
> tried to find the registry path the installer is checking by inspecting the
> source code (https://bitbucket.org/anthony_tuininga/cx_oracle), but I
> wasn’t able to find that error string. Can anyone here point me in one
> direction or another?
>
>
>
> P.S. I’m trying to keep this message short, but: I have also tried to
> build & install the cx_Oracle module using pip, and while the server has 10
> separate versions of the MS Visual C++ redistributable and the 11GB MS
> Video Studio Community 2015 package installed, that build attempt always
> fails at “error: Unable to find vcvarsall.bat” so I’m hoping the registry
> issue with the binary installer might be easier to resolve.
>
>
>
> --Greg
>
>
>
>
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