From python-list  Fri Nov 23 17:36:15 2007
From: Sorin Schwimmer <sxn02 () yahoo ! com>
Date: Fri, 23 Nov 2007 17:36:15 +0000
To: python-list
Subject: Re: Function stopping a function
Message-Id: <411682.45964.qm () web56010 ! mail ! re3 ! yahoo ! com>
X-MARC-Message: https://marc.info/?l=python-list&m=119584736302715

In my situation, there is a device with keyboard that
allows some user input. In the same time, the device
is connected to a standard PC, and there may be some
communication there.

The lengthy_function() resides and executes in the
device, and so is cancel().

Lengthy_function() is pretty linear: according to some
conditions, the user is asked for this or that. Than,
with the new conditions, lenghty_function() may need
to communicate with the PC. And now, with the updated
conditions, may ask more stuff from user.

At any time the user can press a CANCEL button, or the
PC can generate a CANCEL.

What I have now is a global variable which cancel()
will change and then, each "if" statement in
lenghty_function() will check that variable, together
with its specific condition. I was hopping that there
may be a more elegant solution.

No threads involved in my design (apart for what the
device may have to handle events like button-press and
serial communication).

Thanks everyone for your answers.

Regards,
SxN


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