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You left python list off your reply.

> On 29 Jul 2020, at 23:38, R Pasco <pascor22234 at> wrote:
> Hi, Barry,
> On Wed, Jul 29, 2020 at 5:12 PM Barry <barry at <mailto:barry at>> wrote:
> > On 29 Jul 2020, at 19:50, R Pasco <pascor22234 at <mailto:pascor22234 at>> wrote:
> > 
> > ?I'm running python 3.8 on Windows 8.1 x64. Running the following code
> > produces no errors but does not add a key, name or value. I had no problems
> > doing this using _wirreg under python 2.7. Any insight will be helpful.
> How do you check that the key is present?
> I'm using regedit.exe to try to view it. 
> Are you aware that there is one registry for 32 bit code and a separate registry for 64 bit code.
> Only vaguely. Are the "separate" registries really 64 and 32 views of the one and only Registry ? That is, using Winreg ?
> Some examples use "winreg.KEY_ALL_ACCESS | winreg.KEY_WOW64_32KEY" as the access mode. Not sure what this does.
> I am using python 64-bit, so what should the argument value "access=" be set to in the call to "winreg.CreateKeyEx()" ?

Yes they are views.

I cannot remember the details, but I suggest that you look up the details on microsoft's MSDN for the info you need.

Searching for KEY_WOW64_32KEY takes you into thoses docs for example.