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To: python-list@python.org
From: Terry Reedy <tjreedy@udel.edu>
Subject: Re: pythonw.exe
Date: Sun, 14 Aug 2011 20:49:25 -0400
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On 8/14/2011 10:30 AM, Nobody wrote:

> The main use for pythonw.exe is if you write a GUI program in Python
> (using e.g. TkInter, wxPython, etc) and you want it to be able to run it
> from an icon (desktop, start menu) without it opening a console window
> (running a console executable from an icon will open a console window).

In particular, IDLE runs in a pythonw process and it executes user code 
in a separate pythonw process and usually uses a socket for the connection.

-- 
Terry Jan Reedy