Re: Design thought for callbacks

Date	2015-02-22 13:02 -0800
From	Ethan Furman <ethan@stoneleaf.us>
Subject	Re: Design thought for callbacks
References	(2 earlier) <39813568-6DB8-4341-A130-C256CFF352EE@gmail.com> <CAPTjJmrfMowbK7z+eN7xfMv2Ck5peJpBPyBRHvhXM4-ocxRR6w@mail.gmail.com> <mailman.18962.1424527666.18130.python-list@python.org> <54e8c017$0$13008$c3e8da3$5496439d@news.astraweb.com> <51947083-01AC-4D1E-ACBD-3C476446B527@gmail.com>
Newsgroups	comp.lang.python
Message-ID	<mailman.19028.1424638965.18130.python-list@python.org> (permalink)

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On 02/22/2015 05:13 AM, Cem Karan wrote:

> Output:
> From Evil Zombie: Surprise!
> From Your Significant Other: Surprise!
> 
> In this case, the user made an error (just as Marko said in his earlier message),
> and forgot about the callback he registered with the library.  The callback isn't
> really rising from the dead; as you say, either its been garbage collected, or it
> hasn't been.  However, you may not be ready for a callback to be called at that
> moment in time, which means you're surprised by unexpected behavior.

But the unexpected behavior is not a problem with Python, nor with your library -- it's a bug in the fellow-programmer's
code, and you can't (or at least shouldn't) try to prevent those kinds of bugs from manifesting -- they'll just get
bitten somewhere else by the same bug.

--
~Ethan~

Thread

Re: Design thought for callbacks Cem Karan <cfkaran2@gmail.com> - 2015-02-21 09:07 -0500
  Re: Design thought for callbacks Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-02-22 04:27 +1100
    Re: Design thought for callbacks Cem Karan <cfkaran2@gmail.com> - 2015-02-22 08:13 -0500
      Re: Design thought for callbacks Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-02-24 00:31 +1100
    Re: Design thought for callbacks Ethan Furman <ethan@stoneleaf.us> - 2015-02-22 13:02 -0800
    Re: Design thought for callbacks Cem Karan <cfkaran2@gmail.com> - 2015-02-22 16:17 -0500
      Re: Design thought for callbacks Marko Rauhamaa <marko@pacujo.net> - 2015-02-22 23:34 +0200
        Re: Design thought for callbacks Cem Karan <cfkaran2@gmail.com> - 2015-02-22 17:09 -0500
        Re: Design thought for callbacks Laura Creighton <lac@openend.se> - 2015-02-22 23:29 +0100
        Re: Design thought for callbacks Chris Angelico <rosuav@gmail.com> - 2015-02-23 09:41 +1100
        Re: Design thought for callbacks Cem Karan <cfkaran2@gmail.com> - 2015-02-23 06:47 -0500
        Re: Design thought for callbacks "Frank Millman" <frank@chagford.com> - 2015-02-23 14:29 +0200
        Re: Design thought for callbacks Cem Karan <cfkaran2@gmail.com> - 2015-02-24 06:00 -0500

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