How to use a timer in Python?
kraus at hagen-partner.de
Fri Sep 23 08:31:25 CEST 2005
Nico Grubert wrote:
> Hi there,
> on a Linux machine running Python 2.3.5. I want to create a file
> 'newfile' in a directory '/tmp' only if there is no file 'transfer.lock'
> in '/temp'.
> A cronjob creates a file 'transfer.lock' in '/temp' directory every 15
> minutes while the cronjob is doing something. This job takes around 30
> seconds. During these 30 seconds the 'transfer.lock' file is present in
> the '/temp' directory and I must not create 'newfile'. After the cronjob
> has been finished, the 'transfer.lock' file is deleted from '/temp' and
> I can create 'newfile'.
> How can I use a timer that waits e.g. 10 seconds if 'transfer.lock' is
> present and then checks again if 'transfer.lock' is still there?
> I want to do something like this:
> import os
> if 'transfer.lock' in os.listdir('/temp'):
> # ...wait 10 seconds and then check again if
> # 'transfer.lock' is in os.listdir('/temp')
> # create 'newfile'
For more information: help(time.sleep) ;-)
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