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Date: Wed, 21 Nov 2012 09:34:40 +0000
From: Tim Golden <mail@timgolden.me.uk>
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Subject: Re: windows question: default click action points to wrong python version
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On 21/11/2012 08:23, Gelonida N wrote:
> Hi,
> 
> I installed python 2.6 and python 2.7 on a windows 7 machine.
> 
> At the moment Python 2.7 is the interpreter being used if I 'start' a
> python script without explicit interpreter.
> 
> I always thought, that 'repairing' Python 2.6 (reinstalling it) would
> set the default settings back to Python 2.6.
> 
> I also see with assoc / ftypes, that python 2.6. has now been configured
> as default.
> 
> However when I click on a script it is still started with 2.7.
> (even after a full restart of the machine)
> 
> This is really surprising to me.
> I thought ftype is the command to change file associations.


This area is a bit messy. There is a difference between: going to the
command line and typing "myscript.py"; and double-clicking on a file in
Explorer.

The former uses the result of merging the assoc/ftype registry keys:

   HKEY_CURRENT_USER\Software\Classes\Python.File\shell\open\command

   HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Python.File\shell\open\command


while the latter uses the Explorer registry keys at:


HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.py\UserChoice


Initially, I suppose, the two are in sync. But presumably they can get
out of sync, especially if you move backwards and forwards between
associations. I haven't bothered fishing around in the Shell API but I
presume that you can reconcile the two -- or just edit the registry,
obviously.

TJG