[python-win32] How to determine if a process (known pid) is still running ?

[Stef Mientki]

Tim Golden wrote:
> Stef Mientki wrote:
>> How to determine if a process (known pid) os still running ?
>>
>> Googling the web, I found 1 solution in killing the process,
>> but that's not what I want, I want to reuse the running process.
>>
>> I could also ask a complete list of active processes,
>> but from my experiences that's quite slow.
>>
>> Any better solutions ?
>
> I'm not entirely sure what you're trying to achieve,
> or what "reuse the running process" means. 
ok, maybe I'm totally on the wrong track (I'm just an amateur),
because the GetExitCodeProcess, suggested by Julia,
gives an error "invalid handle"

What I want is quite simple:
from my program I want to show chm-help info,
so I've the following code

1      if not ( self.Win32_Viewer ) :
2        self.Win32_Viewer = win32help.HtmlHelp ( 0, str(CHM), 
win32help.HH_DISPLAY_INDEX, '' )
3      win32help.HtmlHelp ( self.Win32_Viewer,
4                           str(CHM),
5                           win32help.HH_DISPLAY_INDEX,
6                           str ( keyword ) )

Now this works well, until the user has closed the windows help window,
in which case line 3 crashes (of course).

Now I just did some experiments,
and saw that I could probably do enough by only performing line 2 (with 
a keyword),
as this, to my surprise, uses the same help window if one is already opened.
Is this indeed A corrrect way ?

thanks,
Stef


> This WMI
> snippet will tell you whether a given pid is running
> or not. As you may know, WMI isn't the fastest thing
> on earth, but it may be fast enough for you.
>
> <code>
> import wmi
>
> pid = int (raw_input ("Enter PID:"))
>
> c = wmi.WMI (find_classes=False)
> for process in c.Win32_Process ([], ProcessId=pid):
>   print "PID %s in use by %s" % (pid, process.Caption)
>   break
> else:
>   print "PID %d not in use" % pid
>
> </code>
>
>
> TJG
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