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Re: __next__ and StopIteration

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Date Tue, 10 Feb 2015 12:58:44 +1100
Subject Re: __next__ and StopIteration
From Chris Angelico <rosuav@gmail.com>
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On Tue, Feb 10, 2015 at 12:11 PM, Steven D'Aprano
<steve+comp.lang.python@pearwood.info> wrote:
>> Yes, it is allowed. But when you write code that's documented as being
>> "broken", you should expect annoying, subtle errors, maybe a long way
>> down the track.
>
> Well, that depends, don't it?
>
> Am I really going to care if the iterator used to generate those random
> numbers is technically "broken"? Probably not. And if I do, some time in
> the distant future, oh well, I'll "fix" it then.

If you inhale asbestos, you should expect annoying, maybe subtle,
errors, maybe a long way down the track. Good news is, the lab boys
say the symptoms of asbestos poisoning show a median latency of 44.6
years, so if you're thirty or older, you're laughing. Worst case
scenario, you miss out on a few rounds of canasta. Do you care that
your lungs are technically "broken"? Probably not. It's something to
be aware of when you consider working in certain environments, but "be
aware of" doesn't mean "absolutely always avoid".

Okay, maybe it does with asbestos... but not with broken iterators. :)

ChrisA

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Thread

__next__ and StopIteration Charles Hixson <charleshixsn@earthlink.net> - 2015-02-09 11:14 -0800
  Re: __next__ and StopIteration Rob Gaddi <rgaddi@technologyhighland.invalid> - 2015-02-09 19:27 +0000
  Re: __next__ and StopIteration Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-02-10 10:30 +1100
    Re: __next__ and StopIteration Ian Kelly <ian.g.kelly@gmail.com> - 2015-02-09 16:56 -0700
      Re: __next__ and StopIteration Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-02-10 11:42 +1100
        Re: __next__ and StopIteration Chris Angelico <rosuav@gmail.com> - 2015-02-10 11:54 +1100
          Re: __next__ and StopIteration Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-02-10 12:11 +1100
            Re: __next__ and StopIteration Chris Angelico <rosuav@gmail.com> - 2015-02-10 12:58 +1100
        Re: __next__ and StopIteration Chris Kaynor <ckaynor@zindagigames.com> - 2015-02-09 16:59 -0800
          Re: __next__ and StopIteration Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-02-10 16:54 +1100
        Re: __next__ and StopIteration Ian Kelly <ian.g.kelly@gmail.com> - 2015-02-10 01:30 -0700
        Re: __next__ and StopIteration Chris Kaynor <ckaynor@zindagigames.com> - 2015-02-10 09:27 -0800
    Re: __next__ and StopIteration Charles Hixson <charleshixsn@earthlink.net> - 2015-02-09 20:33 -0800
    Re: __next__ and StopIteration Chris Angelico <rosuav@gmail.com> - 2015-02-10 15:46 +1100
    Re: __next__ and StopIteration Charles Hixson <charleshixsn@earthlink.net> - 2015-02-09 22:16 -0800
    Re: __next__ and StopIteration Chris Angelico <rosuav@gmail.com> - 2015-02-10 17:38 +1100
    Re: __next__ and StopIteration Ethan Furman <ethan@stoneleaf.us> - 2015-02-10 08:44 -0800
    Re: __next__ and StopIteration Ian Kelly <ian.g.kelly@gmail.com> - 2015-02-10 09:53 -0700
    Re: __next__ and StopIteration Ethan Furman <ethan@stoneleaf.us> - 2015-02-10 09:33 -0800

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