Watching a file another app is writing

Vishal Bhargava vishal at
Mon Mar 12 19:31:53 CET 2007

What kind of file is it? CSV?

-----Original Message-----
From: at
[ at] On Behalf Of
Jeremy Sanders
Sent: Monday, March 12, 2007 11:26 AM
To: python-list at
Subject: Re: Watching a file another app is writing

Gordon Airporte wrote:

> I'm trying to find a way to take a file that another program has opened
> and writes to periodically, open it simultaneously in Python, and
> automatically update some of my objects in Python when the file is
> written to.
> I can open the file and manually readlines() from it to keep up to date,
> it's the automatic part I'm having trouble with. This is on Windows.

It occurs to me under Unix you could perhaps get your first program to write
to a "named pipe", which you 2nd program could read from. See


Jeremy Sanders

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