Re: Missing python27.dll on Win 7 64-bit

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Date	Fri, 17 Jun 2011 17:23:17 -0500
To	"python-list@python.org" <python-list@python.org>
From	"Thomas L. Shinnick" <tshinnic@prismnet.com>
Subject	Re: Missing python27.dll on Win 7 64-bit
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At 02:13 AM 6/17/2011, David Aldrich wrote:
>Hi
>
>I am building a 32-bit C++ application using Visual C++ Express 2008 
>on 64-bit Windows 7.  The application links to Python, so I 
>installed 32-bit Python 2.7.2 by running python-2.7.2.msi.
>
>When I run my app, I get error:
>
>... python27.dll is missing from your computer ...
>
>and, indeed, it is in neither C:\Windows\System32 nor C:\Windows\SysWOW64.
>
>Please will someone suggest what I am doing wrong?

Maybe nothing, maybe something, too little information to know.

First, _look_ for the file.  That is, find the file wherever it 
is.  Go to the command line and do

     dir /s \ >allfiles.20110617a

Then look at that listing.  WIth Python 2.7.2 which I just installed 
the dll ends up in SysWOW64.  And now I see that they are all there, 
and nowhere else!

      Directory of C:\Windows\SysWOW64
     08/24/2010  07:47 PM         2,148,864 python26.dll
     06/12/2011  03:09 PM         2,206,720 python27.dll
     03/21/2010  01:43 AM         2,137,600 python31.dll
     02/20/2011  10:29 PM         2,227,712 python32.dll

But in December they were in both places!

     2010/11/23 21:42:42      2148864 /cygdrive/c/Windows/System32/python26.dll
     2010/11/23 21:45:32      2286080 /cygdrive/c/Windows/System32/python27.dll
     2010/11/16 20:16:31      2137600 /cygdrive/c/Windows/System32/python31.dll

     2010/11/23 21:42:42      2148864 /cygdrive/c/Windows/SysWOW64/python26.dll
     2010/11/23 21:45:32      2286080 /cygdrive/c/Windows/SysWOW64/python27.dll
     2010/11/16 20:16:31      2137600 /cygdrive/c/Windows/SysWOW64/python31.dll

(Maybe something to do with the 32-bit vs. 64-bit installs 
mis-direction?  I use only the 32-bit now...)

Now, do another install of Python 2.7.2 on another machine.  Do a 
file listing.  Where do the DLLs end up?  Re-do the install on your 
machine.  Where do the DLLs end up?

Do some more checking and tell us what you've _found_ and where...

>Best regards
>
>David
>--
>http://mail.python.org/mailman/listinfo/python-list

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Re: Missing python27.dll on Win 7 64-bit "Thomas L. Shinnick" <tshinnic@prismnet.com> - 2011-06-17 17:23 -0500

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