Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #86166

Re: Design thought for callbacks

Show all headers | View raw

In a message of Sun, 22 Feb 2015 17:09:01 -0500, Cem Karan writes:

>Documentation is a given; it MUST be there.  That said, documenting
>something, but still making it surprising, is a bad idea.  For
>example, several people have been strongly against using a WeakSet to
>hold callbacks because they expect a library to hold onto callbacks.
>If I chose not to do that, and used a WeakSet, then even if I
>documented it, it would still end up surprising people (and from the
>sound of it, more people would be surprised than not).

>Thanks, Cem Karan

No matter what you do, alas, will surprise the hell out of people
because callbacks do not behave as people expect.  Among people who
have used callbacks, what you are polling is 'what are people
familiar with', and it seems for the people around here, now,
WeakSets are not what they are familiar with.

But that is not so surprising.  How many people use WeakSets for
_anything_?  I've never used them, aside from 'ooh! cool shiny
new language feature!  Let's kick it around the park!'  That people
aren't familiar with WeakSets doesn't mean all that much.

The question I have is does this architecture make things harder,
easier or about the same to debug?  To write tests for? to do Test
Driven Design with?

Laura

Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

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

csiph-web