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Re: Looking for a good introduction to object oriented programming with Python

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On 8/7/2012 3:02 PM, Steven D'Aprano wrote:
> On Sun, 05 Aug 2012 19:44:31 -0700, alex23 wrote:
>
>> I think you've entirely missed the point of Design Patterns.
>
> Perhaps I have. Or perhaps I'm just (over-)reacting to the abuse of
> Patterns:
>
> http://c2.com/cgi/wiki?DesignPatternsConsideredHarmful
>
> or that they are a crutch for underpowered languages:

I still remember reading an article something like "Implementing the 
Composite Pattern in C++". The example for the discussion was Pictures 
that could contain sub-Pictures as well as Graphic elements. I 
eventually realized that a) this is trivial in Python, b) the article 
was really about how to lie to a C++ compiler, so it would accept 
recursive heterogenous structures, and c) I preferred Python.

> http://c2.com/cgi/wiki?AreDesignPatternsMissingLanguageFeatures

> I think that as languages get more powerful, "Design Patterns" just
> become language features, and people stop talking about them. Nobody
> talks about Function Pattern, but everyone uses it. In Python, we don't
> talk about the Iterator Pattern. We just use iterators.

In pre 2.2 Python, there was talk about the pattern (but not with 
Capitals) and how to lie to the interpreter with a fake __getitem__ method.

> I'm pretty sure that people could talk about good coding design before
> the Gof4. As you say, they didn't invent the patterns. So people
> obviously wrote code, and talked about algorithms, without the Gof4
> terminology.

'Divide and conquer' is an old, descriptive name for an algorithm action 
pattern. It is only incidentally about static structures.

'Dynamic programming' is a rather opaque name for a) an action patter 
for using the optimality principle* (when applicable) and b) not 
disposing of data one still needs.

* the best path from A to B that passes through C is the best path from 
A to C plus the best path from C to B.

Lisp is based on a simple data pattern (or is it a principle): 
collection (of dicrete items) = one item + remainder, used to both 
construct and deconstruct. Python iterator embody the the same 
principle. next(iterator) = iterator: return one item and mutate 
yourself to represent the rest -- or raise StopIteration.

-- 
Terry Jan Reedy

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[newbie] Looking for a good introduction to object oriented programming with Python Jean Dubois <jeandubois314@gmail.com> - 2012-08-04 08:49 -0700
  Re: [newbie] Looking for a good introduction to object oriented programming with Python shearichard@gmail.com - 2012-08-04 17:11 -0700
    Re: Looking for a good introduction to object oriented programming with Python Jean Dubois <jeandubois314@gmail.com> - 2012-08-05 05:38 -0700
    Re: Looking for a good introduction to object oriented programming with Python Jean Dubois <jeandubois314@gmail.com> - 2012-08-05 11:04 -0700
      Re: Looking for a good introduction to object oriented programming with Python Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-08-05 19:28 +0100
        Re: Looking for a good introduction to object oriented programming with Python Jean Dubois <jeandubois314@gmail.com> - 2012-08-06 07:56 -0700
          Re: Looking for a good introduction to object oriented programming with Python Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-08-06 17:17 +0100
            Re: Looking for a good introduction to object oriented programming with Python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-07 01:12 +0000
              Re: Looking for a good introduction to object oriented programming with Python Ben Finney <ben+python@benfinney.id.au> - 2012-08-07 11:23 +1000
              Re: Looking for a good introduction to object oriented programming with Python Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-08-07 08:49 +0100
      Re: Looking for a good introduction to object oriented programming with Python Roy Smith <roy@panix.com> - 2012-08-05 14:39 -0400
      Re: Looking for a good introduction to object oriented programming with Python Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-08-05 19:53 +0100
      Re: Looking for a good introduction to object oriented programming with Python Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2012-08-05 18:45 -0400
        Re: Looking for a good introduction to object oriented programming with Python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-05 22:51 +0000
          Re: Looking for a good introduction to object oriented programming with Python Roy Smith <roy@panix.com> - 2012-08-05 19:12 -0400
            Re: Looking for a good introduction to object oriented programming with Python Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-08-06 00:30 +0100
            Re: Looking for a good introduction to object oriented programming with Python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-06 00:27 +0000
              Re: Looking for a good introduction to object oriented programming with Python Dan Sommers <dan@tombstonezero.net> - 2012-08-05 17:50 -0700
              Re: Looking for a good introduction to object oriented programming with Python lipska the kat <lipskathekat@yahoo.co.uk> - 2012-08-06 08:48 +0100
              Re: Looking for a good introduction to object oriented programming with Python DJC <djc@news.invalid> - 2012-08-06 11:20 +0200
            Re: Looking for a good introduction to object oriented programming with Python Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2012-08-05 20:57 -0400
          Re: Looking for a good introduction to object oriented programming with Python lipska the kat <lipskathekat@yahoo.co.uk> - 2012-08-06 08:43 +0100
            Re: Looking for a good introduction to object oriented programming with Python Roy Smith <roy@panix.com> - 2012-08-06 09:16 -0400
        Re: Looking for a good introduction to object oriented programming with Python Wolfgang Strobl <news4@mystrobl.de> - 2012-08-06 08:18 +0200
  Re: [newbie] Looking for a good introduction to object oriented programming with Python dncarac@gmail.com - 2012-08-05 11:59 -0700
  Re: [newbie] Looking for a good introduction to object oriented programming with Python lipska the kat <lipskathekat@yahoo.co.uk> - 2012-08-05 20:46 +0100
    Re: [newbie] Looking for a good introduction to object oriented programming with Python Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-08-05 23:11 +0100
      Re: [newbie] Looking for a good introduction to object oriented programming with Python Roy Smith <roy@panix.com> - 2012-08-05 18:53 -0400
    Re: [newbie] Looking for a good introduction to object oriented programming with Python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-06 00:22 +0000
      Re: [newbie] Looking for a good introduction to object oriented programming with Python Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-08-06 02:02 +0100
      Re: [newbie] Looking for a good introduction to object oriented programming with Python Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2012-08-05 21:14 -0400
        Re: [newbie] Looking for a good introduction to object oriented programming with Python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-06 06:08 +0000
          Re: [newbie] Looking for a good introduction to object oriented programming with Python Paul Rubin <no.email@nospam.invalid> - 2012-08-06 00:25 -0700
      Re: Looking for a good introduction to object oriented programming with Python alex23 <wuwei23@gmail.com> - 2012-08-05 19:44 -0700
        Re: Looking for a good introduction to object oriented programming with Python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-07 19:02 +0000
          Re: Looking for a good introduction to object oriented programming with Python Terry Reedy <tjreedy@udel.edu> - 2012-08-07 18:37 -0400
          Re: Looking for a good introduction to object oriented programming with Python alex23 <wuwei23@gmail.com> - 2012-08-07 17:07 -0700
            Re: Looking for a good introduction to object oriented programming with Python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-08 02:14 +0000
              Re: Looking for a good introduction to object oriented programming with Python Chris Angelico <rosuav@gmail.com> - 2012-08-08 12:24 +1000
              Re: Looking for a good introduction to object oriented programming with Python alex23 <wuwei23@gmail.com> - 2012-08-07 20:20 -0700
      Re: [newbie] Looking for a good introduction to object oriented programming with Python lipska the kat <lipskathekat@yahoo.co.uk> - 2012-08-06 09:55 +0100
        Re: [newbie] Looking for a good introduction to object oriented programming with Python lipska the kat <lipskathekat@yahoo.co.uk> - 2012-08-06 10:24 +0100
          Re: [newbie] Looking for a good introduction to object oriented programming with Python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-07 05:35 +0000
            Re: [newbie] Looking for a good introduction to object oriented programming with Python lipska the kat <lipskathekat@yahoo.co.uk> - 2012-08-07 09:16 +0100
        Re: [newbie] Looking for a good introduction to object oriented programming with Python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-07 05:19 +0000
          Re: [newbie] Looking for a good introduction to object oriented programming with Python lipska the kat <lipskathekat@yahoo.co.uk> - 2012-08-07 10:19 +0100
            Re: [newbie] Looking for a good introduction to object oriented programming with Python Ben Finney <ben+python@benfinney.id.au> - 2012-08-07 23:12 +1000
              Re: [newbie] Looking for a good introduction to object oriented programming with Python lipska the kat <lipskathekat@yahoo.co.uk> - 2012-08-07 15:13 +0100
            Re: [newbie] Looking for a good introduction to object oriented programming with Python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-07 14:14 +0000
              Re: [newbie] Looking for a good introduction to object oriented programming with Python lipska the kat <lipskathekat@yahoo.co.uk> - 2012-08-07 15:34 +0100
                Re: Looking for a good introduction to object oriented programming with Python rusi <rustompmody@gmail.com> - 2012-08-07 08:04 -0700
                Re: Looking for a good introduction to object oriented programming with Python lipska the kat <lipskathekat@yahoo.co.uk> - 2012-08-07 18:00 +0100
                Re: Looking for a good introduction to object oriented programming with Python Chris Angelico <rosuav@gmail.com> - 2012-08-08 07:57 +1000
                Re: Looking for a good introduction to object oriented programming with Python lipska the kat <lipskathekat@yahoo.co.uk> - 2012-08-08 10:51 +0100
                Re: Looking for a good introduction to object oriented programming with Python rusi <rustompmody@gmail.com> - 2012-08-08 09:27 -0700
                Re: Looking for a good introduction to object oriented programming with Python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-08 17:28 +0000
                Re: Looking for a good introduction to object oriented programming with Python Chris Angelico <rosuav@gmail.com> - 2012-08-09 11:32 +1000
                Re: Looking for a good introduction to object oriented programming with Python Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2012-08-08 12:42 -0400
                Re: Looking for a good introduction to object oriented programming with Python lipska the kat <lipskathekat@yahoo.co.uk> - 2012-08-08 20:31 +0100
                Re: Looking for a good introduction to object oriented programming with Python Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2012-08-08 22:59 -0400
                Re: Looking for a good introduction to object oriented programming with Python lipska the kat <lipskathekat@yahoo.co.uk> - 2012-08-09 08:29 +0100
                Geneology Packages -- WAS: Looking for a good introduction to object oriented programming with Python Simon Cropper <simoncropper@fossworkflowguides.com> - 2012-08-09 13:51 +1000
                Re: Geneology Packages Ben Finney <ben+python@benfinney.id.au> - 2012-08-09 14:00 +1000
    Re: Looking for a good introduction to object oriented programming with Python rusi <rustompmody@gmail.com> - 2012-08-06 05:19 -0700
      Re: Looking for a good introduction to object oriented programming with Python lipska the kat <lipskathekat@yahoo.co.uk> - 2012-08-06 15:27 +0100
        Re: Looking for a good introduction to object oriented programming with Python rusi <rustompmody@gmail.com> - 2012-08-06 09:34 -0700
          Re: Looking for a good introduction to object oriented programming with Python Chris Angelico <rosuav@gmail.com> - 2012-08-07 08:44 +1000
      OT probably but still relevant (was Re: Looking for a good introduction to object oriented programming with Python) lipska the kat <lipskathekat@yahoo.co.uk> - 2012-08-06 17:23 +0100
        Re: OT probably but still relevant (was Re: Looking for a good introduction to object oriented programming with Python) Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-07 09:44 +0000
          Re: OT probably but still relevant (was Re: Looking for a good introduction to object oriented programming with Python) lipska the kat <lipskathekat@yahoo.co.uk> - 2012-08-07 11:23 +0100

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