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Re: except clause syntax question

References <mailman.5218.1327946109.27778.python-list@python.org> <Xns9FEBE05D32BCCduncanbooth@127.0.0.1>
Date 2012-02-01 11:53 +1100
Subject Re: except clause syntax question
From Chris Angelico <rosuav@gmail.com>
Newsgroups comp.lang.python
Message-ID <mailman.5270.1328057631.27778.python-list@python.org> (permalink)

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On Wed, Feb 1, 2012 at 9:03 AM, Duncan Booth
<duncan.booth@invalid.invalid> wrote:
> Abitrarily nested tuples of exceptions cannot contain loops so the code
> simply needs to walk through the tuples until it finds a match.

Is this absolutely guaranteed? The C API for CPython provides:
(Py2) http://docs.python.org/c-api/tuple.html#PyTuple_SetItem
(Py3) http://docs.python.org/dev/c-api/tuple.html#PyTuple_SetItem

which doesn't have massive warnings on it saying "USE THIS ONLY TO
INITIALIZE A TUPLE" (compare, for instance, _PyTuple_Resize which does
carry a similar warning). Is the assumption then that we're all
adults, and that mutating a tuple is like passing a null pointer to an
API function (aka "loaded gun in proximity to foot")?

ChrisA

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Thread

except clause syntax question Charles Yeomans <charles@declareSub.com> - 2012-01-30 12:41 -0500
  Re: except clause syntax question Mel Wilson <mwilson@the-wire.com> - 2012-01-30 14:15 -0500
  Re: except clause syntax question Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-01-31 00:00 +0000
    Re: except clause syntax question Devin Jeanpierre <jeanpierreda@gmail.com> - 2012-01-30 19:25 -0500
    Re: except clause syntax question Charles Yeomans <charles@declareSub.com> - 2012-01-31 08:57 -0500
      Re: except clause syntax question Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-01-31 14:51 +0000
        Re: except clause syntax question Charles Yeomans <charles@declareSub.com> - 2012-01-31 11:23 -0500
        Re: except clause syntax question Devin Jeanpierre <jeanpierreda@gmail.com> - 2012-01-31 11:38 -0500
        Re: except clause syntax question Charles Yeomans <charles@declaresub.com> - 2012-01-31 12:29 -0500
        Re: except clause syntax question Ethan Furman <ethan@stoneleaf.us> - 2012-01-31 08:56 -0800
    Re: except clause syntax question Terry Reedy <tjreedy@udel.edu> - 2012-01-31 19:12 -0500
    Re: except clause syntax question Charles Yeomans <charles@declareSub.com> - 2012-01-31 19:27 -0500
  Re: except clause syntax question Mel Wilson <mwilson@the-wire.com> - 2012-01-31 08:24 -0500
    Re: except clause syntax question Charles Yeomans <charles@declareSub.com> - 2012-01-31 13:04 -0500
  Re: except clause syntax question Duncan Booth <duncan.booth@invalid.invalid> - 2012-01-31 22:03 +0000
    Re: except clause syntax question Chris Angelico <rosuav@gmail.com> - 2012-02-01 11:53 +1100
      Re: except clause syntax question Mel Wilson <mwilson@the-wire.com> - 2012-01-31 23:39 -0500
    Re: except clause syntax question Ian Kelly <ian.g.kelly@gmail.com> - 2012-01-31 18:09 -0700
    Re: except clause syntax question Ian Kelly <ian.g.kelly@gmail.com> - 2012-01-31 18:12 -0700
    Re: except clause syntax question Chris Angelico <rosuav@gmail.com> - 2012-02-01 13:46 +1100

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