Async Sleep?

[Aleksandar Cikota]

Hi all,

Does a async sleep exist?
How to check this every 10 sec, but that the CPU is free?


Code:
import win32com.client
import time
import os
Document = win32com.client .Dispatch('MaxI m.Document')
Application = win32com.client .dynamic.Dispat ch('MaxIm.Appli cation')

path_to_watch = "F:/Images/VRT/"
before = dict ([(f, None) for f in os.listdir (path_to_watch)])

##check this every 10 sec
after = dict ([(f, None) for f in os.listdir (path_to_watch)])
added = [f for f in after if not f in before]
if added:
name= ' ,'.join (added)
print name
if str(name[-3:])=='fit':
Document.OpenFi le('F:/Images/VRT/'+name)
Document.SaveFi le('F:/Images/VRT/'+ str(name[0:-4])+'.jpeg',
6, False)
Application.Clo seAll()

before = after



Tkank You!

Regards,
Aleksandar

[Daniel Nogradi]

Re: Async Sleep?

> Hi all,[color=blue]
>
> Does a async sleep exist?
> How to check this every 10 sec, but that the CPU is free?[/color]

I would use a separate thread for this, perhaps even a completely
detached daemon. You might want to check the docs for threading:

http://docs.python.org/lib/module-threading.html

and these recipes on how to create a daemon:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/278731

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52216

You can also spawn a separate process with the spawn* family of
functions. If you use them with the os.P_NOWAIT mode, your program
will not hang until the spawned process finishes. See:

http://docs.python.org/lib/os-process.html

[Lawrence D'Oliveiro]

Re: Async Sleep?

In article <e1s2h1$m07$1@s s405.t-com.hr>,
"Aleksandar Cikota" <alexci@web.d e> wrote:
[color=blue]
>How to check this every 10 sec, but that the CPU is free?[/color]

Or better still, why not set a notification on the directory, so you're
woken up every time something happens to it?

Look up the inotify mechanism, which was added in version 2.6.13 of the
Linux kernel.

[Tim Head]

Re: Async Sleep?

If your task is indeed to watch a directory for "activity" and thenact
upon this activity then you would be much better of doing what Lawrence
suggests. For linux there is the inotify bit in the kernel.
As you are using win32com I'll assume you are using windows.

This snippet in the cookbook seems to do the job

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/156178

if it doesn't do exactly what you wnat have a poke around win32

tim