how to start a process and get it's pid?
peter at engcorp.com
Sat Nov 12 02:52:57 CET 2005
Fredrik Lundh wrote:
> Daniel Crespo wrote:
>>I don't get the correct PID.
>>When I do os.spawnl(os.P_NOWAIT, "c:/windows/notepad.exe")
>>I get 168 (for example), while in the tasklist appears notepad.exe with
>>the 2476 PID.
> not sure, but the return value looks like a PID, so maybe you're seeing the
> PID for the cmd.exe instance used to run the program. or something.
I believe it's documented here
http://docs.python.org/lib/os-process.html that the return value is not
the PID but the "process handle". I believe this can be converted to
the PID with a convenient pywin32 call though at the moment I can't
recall which. Googling quickly suggests that
win32process.GetWindowThreadProcessId(handle) will do the trick (the
second item returned is the PID), but I'm fairly sure there's a simpler
approach if you keep looking. I recall there being a Cookbook recipe
related to this too....
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