Hi,
Is it possible that a python script finds out whether another instance
of it is currently running or not?
Thank you,
Max 6 1113
gmax2006 wrote:
Hi,
Is it possible that a python script finds out whether another instance
of it is currently running or not?
Thank you,
Max
Yes, there are several ways. What OS are you using?
~Simon
IPC via files, sockets, and shared memory are all readily available in
python.
the simplest way is to have the script write its pid to a certain file.
pidfn = '/tmp/hellowerld_ipc_pid'
if os.path.isfile(pidfn):
f = file(pidfn)
pid = f.read()
f.close()
if pid in os.popen('ps -A -o pid').read():
print "another instance of me is running!"
else:
f = file(pidfn, 'w')
f.write(str(os.getpid()))
f.close()
gmax2006 wrote:
Hi,
Is it possible that a python script finds out whether another instance
of it is currently running or not?
Thank you,
Max
Simon Forman wrote:
gmax2006 wrote:
Hi,
Is it possible that a python script finds out whether another instance
of it is currently running or not?
Thank you,
Max
Yes, there are several ways. What OS are you using?
~Simon
I have to use an os-independent approach.
At this point I use a file as running-flag. It doesn't work so good.
Because if the python application breaks or get terminated, it won't
run again unless somebody deletes the flag file.
Alan
gmax2006 wrote:
Simon Forman wrote:
gmax2006 wrote:
Hi,
>
Is it possible that a python script finds out whether another instance
of it is currently running or not?
>
Thank you,
Max
Yes, there are several ways. What OS are you using?
~Simon
I have to use an os-independent approach.
At this point I use a file as running-flag. It doesn't work so good.
Because if the python application breaks or get terminated, it won't
run again unless somebody deletes the flag file.
Alan
Hmm, I'm very far from being an expert on this, so hopefully someone
who knows better will reply.
You might have to check the OS your script is running on and do, say,
what faulkner proposed for linux (and Mac?), and something like http://aspn.activestate.com/ASPN/Coo.../Recipe/474070 for
windows.
HTH,
~Simon
In article <11**********************@p79g2000cwp.googlegroups .com>,
Simon Forman <ro*********@yahoo.comwrote:
>gmax2006 wrote:
Cameron Laird wrote:
....
Particularly when I hear "os-independent", I think first of
binding to a socket. While <URL: http://wiki.tcl.tk/1558 >
is written for a Tcl-based crowd, the commentary there ap-
plies quite well to Python.
I was going to suggest something like this, as I have noticed that IDLE
seems to do exactly this, and on windows and linux, but I was afraid to
look the fool if it was indeed foolish. (and also, I didn't know
details of it.)
Thanks Cameron.
Peace,
~Simon This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
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