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#529 windows script host behaviour changes after pywin32 install

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nobody
None
5
2011-01-12
2011-01-12
Cyrille Bollu
No

Hi,

This problem has been reported on http://pythonforum.org/topic62-pywin32-and-windows-script-host-problem.html.

I'm experiencing the same problem.

The bug is reproductible (validated with http://surfnet.dl.sourceforge.net/sourceforge/pywin32/pywin32-214.win32-py2.5.exe\):

1- take a computer where pywin32 is not installed
2- open a cmd prompt and type "wscript //h:wscript" => you get a prompt telling you that the default script host has been changed
3- install http://surfnet.dl.sourceforge.net/sourceforge/pywin32/pywin32-214.win32-py2.5.exe
4- open a new cmd prompt and type "wscript //h:wscript" => you get "can't change the default script host"

This problem might seem minor but in my company we use this "wscript //h:wscript" command to silently install softwares on client computers. And, when this problem occurs, our silent installation fails.

I will gladly help but I don't have visual studio.

Best regards,

Cyrille

Discussion

  • Mark Hammond

    Mark Hammond - 2011-01-12

    I can't see how python could manage to do this. Some googling shows other people are having a similar issue without Python being installed - I wonder if the installation of *any* WSH-compatible scripting language is causing the problem?

    > I will gladly help but I don't have visual studio.

    You don't need visual studio - running wscript.exe like that shouldn't be loading Python at all (and certainly can't once it is uninstalled but the problem remains). I expect something we write to the registry isn't being cleaned up or something...

     

  • Christoph Gohlke

    Christoph Gohlke - 2011-01-13

    Try rename or delete HKEY_CLASSES_ROOT\pysFile

     

  • Mark Hammond

    Mark Hammond - 2011-01-13

    In my (limited) testing, I unregistered the AXScript engine (python ...\axscript.py --unregister), which deletes that key and a number of others, and the problem remains. I can't verify it ever did work for me though...

     

  • Christoph Gohlke

    Christoph Gohlke - 2011-01-13

    Seems that [HKEY_CLASSES_ROOT\pysFile\Shell\Open] and [HKEY_CLASSES_ROOT\pysFile\Shell\Open2] keys need to be set in the pywin32\com\win32comext\axscript\client\pyscript.py DllRegisterServer() function. The following registry file works for me on Windows 7:

    REGEDIT4

    [HKEY_CLASSES_ROOT\pysFile]
    @="Python Script File"

    [HKEY_CLASSES_ROOT\pysFile\ScriptEngine]
    @="Python"

    [HKEY_CLASSES_ROOT\pysFile\ShellEx]

    [HKEY_CLASSES_ROOT\pysFile\ShellEx\DropHandler]
    @="{60254CA5-953B-11CF-8C96-00AA00B8708C}"

    [HKEY_CLASSES_ROOT\pysFile\ShellEx\PropertySheetHandlers]

    [HKEY_CLASSES_ROOT\pysFile\ShellEx\PropertySheetHandlers\WSHProps]
    @="{60254CA5-953B-11CF-8C96-00AA00B8708C}"

    [HKEY_CLASSES_ROOT\pysFile\Shell\Open]

    [HKEY_CLASSES_ROOT\pysFile\Shell\Open\Command]
    @=hex(2):22,25,53,79,73,74,65,6d,52,6f,6f,74,25,5c,53,79,73,74,65,6d,33,32,5c,\
    57,53,63,72,69,70,74,2e,65,78,65,22,20,22,25,31,22,20,25,2a,00

    [HKEY_CLASSES_ROOT\pysFile\Shell\Open2]
    @=hex(2):4f,70,65,6e,20,26,77,69,74,68,20,43,6f,6d,6d,61,6e,64,20,50,72,6f,6d,\
    70,74,00
    "MUIVerb"=hex(2):40,25,53,79,73,74,65,6d,52,6f,6f,74,25,5c,53,79,73,74,65,6d,\
    33,32,5c,77,73,68,65,78,74,2e,64,6c,6c,2c,2d,34,35,31,31,00

    [HKEY_CLASSES_ROOT\pysFile\Shell\Open2\Command]
    @=hex(2):22,25,53,79,73,74,65,6d,52,6f,6f,74,25,5c,53,79,73,74,65,6d,33,32,5c,\
    43,53,63,72,69,70,74,2e,65,78,65,22,20,22,25,31,22,20,25,2a,00

     

  • Christoph Gohlke

    Christoph Gohlke - 2011-01-13

    Just to be sure: "wscript //h:wscript" must be run as administrator to succeed.

     

  • Cyrille Bollu

    Cyrille Bollu - 2011-01-13

    >Just to be sure: "wscript //h:wscript" must be run as administrator to
    succeed.
    yes sure. I run it as local administrator

    Now, I've removed pywin32-214.win32-py25 from my computer and I can't manage to re-install it.

    I'll now reboot my computer to see if my python 2.6 & co. installation worked. If yes, I'll try your regedit trick.

    BR,

    Cyrille

     

  • Cyrille Bollu

    Cyrille Bollu - 2011-01-13

    Hi,

    Great!

    The registry changes did the trick.

    Many thanks!

    Cyrille

    PS: I let you close the bug

    ========================

    What I did:
    -------------

    Installed python-2.6
    Installed http://downloads.sourceforge.net/project/pywin32/pywin32/Build%20214/pywin32-214.win32-py2.6.exe
    wscript //h:wscript => doesn't work (usual error)
    regedit
    wscript //h:wscript => works

    Note:
    ------

    In my case I only add to create the [HKEY_CLASSES_ROOT\pysFile\Shell] hive; The rest of [HKEY_CLASSES_ROOT\pysFile] was correct.

     

  • Mark Hammond

    Mark Hammond - 2011-04-26

    I still can't find a solution to this. FWIW, the note below about changing the registry is simply a workaround to the problem - it manually sets wscript as the default for .pys files but does not allow for the //h command to succeed in the future.

     

  • Christoph Gohlke

    Christoph Gohlke - 2011-04-26

    That's strange. wscript //h: and cscript //h: commands do succeed for me after manually merging the registry file (Windows 7 Pro 64 bit). Maybe another registry key is incomplete on your system?