Run a powershell script from python that uses Web-Administration module

Question

I have a very long powershell script that I need to execute from a python script. The powershell script works fine when I run it from command line, but fails when I run it from python.

I've simplified my powershell script to the following code, which reproduces the issue.

Powershell Script:

import-module WebAdministration
Add-Type -Path C:\Windows\System32\inetsrv\Microsoft.Web.Administration.dll
Set-WebConfigurationProperty '/system.webServer/proxy' -Name "enabled" -Value "true"

Python Script:

import subprocess
print subprocess.check_output("powershell [pathToMyPowershellScript]");

When I run the powershell script from cmd.exe, it works fine and produces no output. When I run the python script, it produces the following error:

Set-WebConfigurationProperty : Retrieving the COM class factory for component 
with CLSID {688EEEE5-6A7E-422F-B2E1-6AF00DC944A6} failed due to the following
error: 80040154
Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG)).
At [pathToMyPowershellScript]:3 char:1
+ Set-WebConfigurationProperty '/system.webServer/proxy' -Name "enabled" -Value "t ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo          
 : NotSpecified: (:) [Set-WebConfigurationProperty], COMException
+ FullyQualifiedErrorId : System.Runtime.InteropServices.COMException,
  Microsoft.IIs.PowerShell.Provider.SetConfigurationPropertyCommand

I'm running IIS 7.5 on Windows 7 Professional (x64), with Python 2.7 and Powershell 1.0 Any ideas?

Also happens when I run the powershell script from ruby

zcotter
– zcotter

2013-03-18 19:39:01 +00:00
Commented Mar 18, 2013 at 19:39 — zcotter
– zcotter, Commented Mar 18, 2013 at 19:39

zcotter · Accepted Answer · 2013-03-29 17:17:24Z

2

I was able to fix this by running the powershell script from the "sysnative" version of cmd:

subprocess.check_call("c:\\windows\\sysnative\\cmd.exe /c 
                       powershell pathToScript", shell=True)

This solves the bitness issue.

answered Mar 29, 2013 at 17:17

zcotter

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1 Comment

Fernando Retimo Over a year ago

I've been looking for ages for a solution, This did the work!!

Christopher Douglas · Accepted Answer · 2013-03-18 23:52:29Z

1

Your program may be calling the wrong version of powershell, try explictly calling the exe.

%SystemRoot%\SysWoW64\WindowsPowerShell\v1.0\powershell.exe

Heres some related reading you might find interesting.

answered Mar 18, 2013 at 23:52

Christopher Douglas

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