[issue39296] Windows register keys

[Tony]

Tony  added the comment:

Hi Steve,

Thank you for this. 
I know about the working of WOW64 and the redirection to the 
(HKEY_LOCAL_MACHINE) ..\Wow6432Node, that is explained on md.docs.
The HKEY_CURRENT_USER redirection is not well explained, and so it appears I’m 
not the only one (Google) who was confused about this behavior.
So, again, many thanks for your explanation!

Tony Kalf.

Van: Steve Dower
Verzonden: maandag 13 januari 2020 19:49
Aan: factoryx.c...@gmail.com
Onderwerp: [issue39296] Windows register keys

Steve Dower  added the comment:

You should read the version number from the Version or SysVersion values, 
rather than from the tag.

Having -32 in the key name is a compatibility requirement. Without it, if you 
installed 32-bit and 64-bit versions for the current user (which is now the 
default), they would overwrite each other.

The Wow6432Node key is due to Windows, not Python. We don't decide the name or 
when it is used, and Windows determined that HKEY_CURRENT_USER is not subject 
to registry redirection. That's why you don't see it there.

Hope that helps clarify what's going on.

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[issue39296] Windows register keys

[Steve Dower]

Steve Dower  added the comment:

You should read the version number from the Version or SysVersion values, 
rather than from the tag.

Having -32 in the key name is a compatibility requirement. Without it, if you 
installed 32-bit and 64-bit versions for the current user (which is now the 
default), they would overwrite each other.

The Wow6432Node key is due to Windows, not Python. We don't decide the name or 
when it is used, and Windows determined that HKEY_CURRENT_USER is not subject 
to registry redirection. That's why you don't see it there.

Hope that helps clarify what's going on.

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[issue39296] Windows register keys

[Tony]

Tony  added the comment:

The attachment I forgot..

Greetings, Tony.

Van: Steve Dower
Verzonden: zaterdag 11 januari 2020 17:30
Aan: factoryx.c...@gmail.com
Onderwerp: [issue39296] Windows register keys

Steve Dower  added the comment:

Have you read PEP 514? Does that help?

If not, can you provide specific suggestions in terms of that standard to help 
us understand what you are suggesting?

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Added file: https://bugs.python.org/file48836/python-reg1.jpg

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[issue39296] Windows register keys

[Tony]

Tony  added the comment:

Hello Steve,

I just red the PEP 514.
Thank you for pointing this out.
However, when installing the latest version (3.8.1), the multi-user install is 
registered under key 
“HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\” as the PEP describes.
The key “HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Python\PythonCore\3.8-32”
Is a bit confusing, because since I know I have to search the registry for 
32bit apps installed on a 64bit OS in “..\WOW6432Node”,
the versionsuffix “-32” is a bit overdone in my opinion because have to write 
extra code to extract the version number only, as you can see in the screenshot 
of the registry (See attachment).
The single user option however, is registered different. Here the key is not 
registered  like the multi-user option under key “..\WOW6432Node”, but in key 
“HKEY_CURRENT_USER\Software\” while I would expect the same as the Multi-user 
option: “..\WOW6432Node”.
I hope I explained enough about this.

Greetings, Tony.

Van: Steve Dower
Verzonden: zaterdag 11 januari 2020 17:30
Aan: factoryx.c...@gmail.com
Onderwerp: [issue39296] Windows register keys

Steve Dower  added the comment:

Have you read PEP 514? Does that help?

If not, can you provide specific suggestions in terms of that standard to help 
us understand what you are suggesting?

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[issue39296] Windows register keys

[Steve Dower]

Steve Dower  added the comment:

Have you read PEP 514? Does that help?

If not, can you provide specific suggestions in terms of that standard to help 
us understand what you are suggesting?

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[issue39296] Windows register keys

[Tony]

New submission from Tony :

It would be more practical to name the Windows main registry keys 'python', 
with for example 'python32' or 'python64'. This would make searching the 
registry for registered python versions (single and/or multi users) a lot 
easier.

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components: Windows
messages: 359765
nosy: ToKa, paul.moore, steve.dower, tim.golden, zach.ware
priority: normal
severity: normal
status: open
title: Windows register keys
versions: Python 3.8

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