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Re: Delegation in Python

Date 2015-01-24 15:47 -0800
From Gary Herron <gherron@digipen.edu>
Subject Re: Delegation in Python
References <FeCdnXdsTpunvlnJnZ2dnUVZ8judnZ2d@brightview.co.uk> <mailman.18106.1422141738.18130.python-list@python.org> <5ZKdnd6rbdZ3sVnJnZ2dnUVZ8mCdnZ2d@brightview.co.uk>
Newsgroups comp.lang.python
Message-ID <mailman.18111.1422143281.18130.python-list@python.org> (permalink)

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On 01/24/2015 03:38 PM, Brian Gladman wrote:
> On 24/01/2015 23:22, Chris Angelico wrote:
>> class RF(Fraction):
>>      def is_integer(self):
>>         return self.numerator % self.denominator == 0
> Thanks for your help on this.  I must admit that nowhere in a lot of
> searching did I find that delegation is achieved by doing nothing!
>
>     Brian

That's *not* "doing nothing".   And it's not even really "delegation".  
It's just sub-classing Fraction to add one new method and inherit all 
other methods.

Gary Herron


-- 
Dr. Gary Herron
Department of Computer Science
DigiPen Institute of Technology
(425) 895-4418

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Thread

Delegation in Python Brian Gladman <noone@nowhere.net> - 2015-01-24 22:57 +0000
  Re: Delegation in Python Chris Angelico <rosuav@gmail.com> - 2015-01-25 10:22 +1100
    Re: Delegation in Python Brian Gladman <noone@nowhere.net> - 2015-01-24 23:38 +0000
      Re: Delegation in Python Chris Angelico <rosuav@gmail.com> - 2015-01-25 10:43 +1100
        Re: Delegation in Python Brian Gladman <noone@nowhere.net> - 2015-01-25 00:18 +0000
          Re: Delegation in Python Chris Angelico <rosuav@gmail.com> - 2015-01-25 11:28 +1100
            Re: Delegation in Python Brian Gladman <noone@nowhere.net> - 2015-01-25 07:49 +0000
              Re: Delegation in Python Chris Angelico <rosuav@gmail.com> - 2015-01-25 19:07 +1100
      Re: Delegation in Python Gary Herron <gherron@digipen.edu> - 2015-01-24 15:47 -0800
        Re: Delegation in Python Brian Gladman <noone@nowhere.net> - 2015-01-24 23:58 +0000
  Re: Delegation in Python Gary Herron <gherron@digipen.edu> - 2015-01-24 15:41 -0800
    Re: Delegation in Python Brian Gladman <noone@nowhere.net> - 2015-01-24 23:52 +0000
  Re: Delegation in Python Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-01-24 23:59 +0000
  Re: Delegation in Python Chris Angelico <rosuav@gmail.com> - 2015-01-25 11:07 +1100
  Re: Delegation in Python Terry Reedy <tjreedy@udel.edu> - 2015-01-24 20:31 -0500
    Re: Delegation in Python Brian Gladman <noone@nowhere.net> - 2015-01-25 07:43 +0000

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