Problem listing services with wmi

[Jean-Sébastien Guay]

Hello,

I'm pretty new to Python, though I have a fair bit of experience with 
C/C++, Java, Perl, PHP and others.

I installed Tim Golden's wmi module 
(http://tgolden.sc.sabren.com/python/wmi.html), in the hopes it would 
help me list and work with services on my Win32 machine. Now, everything 
seems fine except for one thing : Listing services!

I tried running a couple of the examples on Tim's more examples page in 
the python shell (for example, List all running processes, Show the 
percentage free space for each fixed disk, Show the IP and MAC addresses 
for IP-enabled network interfaces, etc.) and they worked fine. But when 
I try to run the first example which is on the first page above, I get 
an error. The code is :

import wmi

c = wmi.WMI ()
for s in c.Win32_Service ():
  if s.State == 'Stopped':
    print s.Caption, s.State


and I get :

Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "G:\Python-2.4\Lib\site-packages\wmi.py", line 404, in __call__
    return self.wmi.query (wql)
  File "G:\Python-2.4\Lib\site-packages\wmi.py", line 583, in query
    raise WMI_EXCEPTIONS.get (hresult, x_wmi (hresult))
wmi.x_wmi: -2147217398

(the exception seems to be thrown on the "for s in..." line)
I have only found one discussion in this newsgroup's archives that seems 
to talk about this problem 
(http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/19fa91ea1a1ff160/0364b7cd22d73483?q=WMI_EXCEPTIONS&rnum=1#0364b7cd22d73483) 
and the fix they suggest there (calling pythoncom.CoInitialize () before 
instantiating the WMI object) doesn't seem to work in this case. In 
other words, this code :

import wmi
import pythoncom

pythoncom.CoInitialize ()
c = wmi.WMI ()
for s in c.Win32_Service ():
  if s.State == 'Stopped':
    print s.Caption, s.State

gives me the same result as above.

Could someone please point me in the right direction to find out what's 
wrong?

Thanks in advance,

J-S

-- 
___________________________________________
Jean-Sébastien Guay   jean_seb at videotron.ca
             http://whitestar02.webhop.org/