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Date: Tue, 2 Jun 2015 13:26:42 +0200
Subject: for...else
From: acdr <mail.acdr@gmail.com>
To: python-list@python.org
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Xref: csiph.com comp.lang.python:91821

Hi,

Currently, in various places in my code, I have the equivalent of:

for x in it:
    if complicated_calculation_1():
        cleanup()
        break
    complicated_calculation_2()
    if complicated_calculation_3():
        cleanup()
        break

Obviously, I'm repeating myself by having two separate calls to
cleanup(). I can't really see a nicer way to do this. (Though I see
plenty of non-nice ways to do this, such as adding "broken = True" in
front of every "break", and then after the loop is done, have an "if
broken" section.) Other solutions that I'm not particularly fond of
can be found on stackexchange, where someone else is trying to do the
same thing:
http://stackoverflow.com/questions/3296044/opposite-of-python-for-else

I'm wondering if there is a demand for expanding the "for...else"
functionality to be expanded also have a block of code that only gets
called if the loop is broken out of. I.e.:

for x in it:
    ...
then:
    # "break" was called
    ...
else:
    # "break was not called
    ...