Newbie question

[Harry Knitter]

Hello,

I am new with Python and would like to know how to achieve to make a Python
program continously listening if a certain data file is changed from
another program.
Thanks

Harry

p.s. Im working under Linux

 

[Thomas Guettler]

Am Fri, 23 Jul 2004 13:03:47 +0200 schrieb Harry Knitter:

Hello,

I am new with Python and would like to know how to achieve to make a Python
program continously listening if a certain data file is changed from
another program.
Thanks

untested:

import os
import time

file="...."
mtime=os.path.getmtime(file)
while 1:
if os.path.getmtime(file)!=mtime:
print "%s changed" % file
mtime=os.path.getmtime(file)
time.sleep(1)

 

[Harry Knitter]

Am Fri, 23 Jul 2004 13:03:47 +0200 schrieb Harry Knitter:


untested:

import os
import time

file="...."
mtime=os.path.getmtime(file)
while 1:
if os.path.getmtime(file)!=mtime:
print "%s changed" % file
mtime=os.path.getmtime(file)
time.sleep(1)

Thanks, however, how do I have to invoke this procedure avoiding the program
remaining in this endles loop.What I want to achieve is, that the program
does something, when the file is changed an then listening again. Meanwhile
the user shoud be able to use the program as usual. i.e. I need this
procedure as a background process triggering a special action.

Harry

 

[Kristofer Pettijohn]

Thanks, however, how do I have to invoke this procedure avoiding the program
remaining in this endles loop.What I want to achieve is, that the program
does something, when the file is changed an then listening again. Meanwhile
the user shoud be able to use the program as usual. i.e. I need this
procedure as a background process triggering a special action.

I don't have time at the moment to post example code, but you'll
want to make a class of it, and make that class a thread
(http://docs.python.org/lib/module-threading.html) so it can run in
the background while your program does other things.