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Re: Default Value

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Subject Re: Default Value
From Rick Johnson <rantingrickjohnson@gmail.com>
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Xref csiph.com comp.lang.python:48882

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On Friday, June 21, 2013 2:25:49 PM UTC-5, MRAB wrote:
> On 21/06/2013 19:26, Rick Johnson wrote:
> > ============================================================
> >   The Apathetic Approach:
> > ============================================================
> > I could just assume that a programmer is responsible for the
> > code he writes. If he passes mutables into a function as
> > default arguments, and then mutates the mutable later, too
> > bad, he'll understand the value of writing solid code after
> > a few trips to exception Hell.
> > ============================================================
> >   The Malevolent Approach (disguised as beneva-loon-icy):
> > ============================================================
> > I could use early binding to confuse the hell out of him and
> > enjoy the laughs with all my ivory tower buddies as he falls
> > into fits of confusion and rage. Then enjoy again when he
> > reads the docs. Ahh, the gift that just keeps on giving!
>
> How does the "Apathetic Approach" differ from the
> "Malevolent Approach"?

In the apathetic approach i allow the programmer to be the
sole proprietor of his own misfortunes. He lives by the
sword, and thus, he can die by the sword.

Alternatively the malevolent approach injects misfortunes
for the programmer on the behalf of esoteric rules. In this
case he will live by sword, and he could die by the sword,
or he could be unexpectedly blown to pieces by a supersonic
Howitzer shell.

It's an Explicit death versus an Implicit death; and Explicit
should ALWAYS win! 

The only way to strike a reasonable balance between the
explicit death and implicit death is to throw up a warning:

 "INCOMING!!!!"

Which in Python would be the "MutableArgumentWarning".

*school-bell*

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Default Value Ahmed Abdulshafy <abdulshafy@gmail.com> - 2013-06-19 12:17 -0700
  Re: Default Value Jussi Piitulainen <jpiitula@ling.helsinki.fi> - 2013-06-19 22:35 +0300
  Re: Default Value Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-19 12:38 -0700
    Re: Default Value rusi <rustompmody@gmail.com> - 2013-06-20 05:57 -0700
      Re: Default Value Roy Smith <roy@panix.com> - 2013-06-20 09:19 -0400
        Re: Default Value rusi <rustompmody@gmail.com> - 2013-06-20 06:31 -0700
        Re: Default Value Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-21 00:17 +0000
          Re: Default Value Roy Smith <roy@panix.com> - 2013-06-20 20:25 -0400
      Re: Default Value Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-20 07:49 -0700
        Re: Default Value Chris Angelico <rosuav@gmail.com> - 2013-06-21 01:38 +1000
          Re: Default Value Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-20 11:05 -0700
            Re: Default Value Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-21 00:57 +0000
              Re: Default Value Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-20 20:16 -0700
                Re: Default Value Chris Angelico <rosuav@gmail.com> - 2013-06-21 17:10 +1000
                Re: Default Value Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-21 07:32 -0700
                Re: Default Value Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-21 16:22 +0000
            Re: Default Value Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-21 15:57 +0000
              Re: Default Value Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-21 10:01 -0700
                Re: Default Value Rotwang <sg552@hotmail.co.uk> - 2013-06-21 18:47 +0100
                Re: Default Value Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-21 11:26 -0700
                Re: Default Value Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-21 18:37 +0000
                Re: Default Value Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-21 12:18 -0700
                Re: Default Value Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-21 12:35 -0700
                Re: Default Value Chris Angelico <rosuav@gmail.com> - 2013-06-22 05:07 +1000
                Re: Default Value Neil Cerutti <neilc@norwich.edu> - 2013-06-21 19:20 +0000
                Re: Default Value Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-21 13:27 -0700
                Re: Default Value Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-22 01:31 +0000
                Re: Default Value Chris Angelico <rosuav@gmail.com> - 2013-06-22 11:40 +1000
                Re: Default Value Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-21 18:42 -0700
                Re: Default Value MRAB <python@mrabarnett.plus.com> - 2013-06-22 03:04 +0100
                Re: Default Value Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-21 19:32 -0700
                Re: Default Value MRAB <python@mrabarnett.plus.com> - 2013-06-22 20:36 +0100
                Re: Default Value Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2013-06-22 18:51 -0400
                Re: Default Value rusi <rustompmody@gmail.com> - 2013-06-21 19:43 -0700
                Re: Default Value Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-06-22 09:26 +0100
                Re: Default Value MRAB <python@mrabarnett.plus.com> - 2013-06-21 20:25 +0100
                Re: Default Value Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-21 13:44 -0700
                Re: Default Value MRAB <python@mrabarnett.plus.com> - 2013-06-21 23:49 +0100
                Re: Default Value Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-21 16:51 -0700
                Re: Default Value MRAB <python@mrabarnett.plus.com> - 2013-06-22 02:54 +0100
                Re: Default Value Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-22 01:15 +0000
                Re: Default Value Ian Kelly <ian.g.kelly@gmail.com> - 2013-06-21 19:27 -0600
                Re: Default Value rusi <rustompmody@gmail.com> - 2013-06-21 19:32 -0700
                Re: Default Value Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-21 19:55 -0700
                Re: Default Value rusi <rustompmody@gmail.com> - 2013-06-21 23:23 -0700
                Re: Default Value Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-22 08:07 -0700
                Re: Default Value rusi <rustompmody@gmail.com> - 2013-06-22 08:31 -0700
                Re: Default Value rusi <rustompmody@gmail.com> - 2013-06-22 09:11 -0700
                Re: Default Value Grant Edwards <invalid@invalid.invalid> - 2013-06-24 14:22 +0000
                Re: [SPAM] Re: Default Value MRAB <python@mrabarnett.plus.com> - 2013-06-24 16:22 +0100
                Re: Default Value Chris Angelico <rosuav@gmail.com> - 2013-06-22 11:41 +1000
                Re: Default Value Michael Torrie <torriem@gmail.com> - 2013-06-21 20:46 -0600
                Re: Default Value Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2013-06-22 16:40 +0200
                Re: Default Value Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2013-06-22 12:49 -0400
                Re: Default Value Ian Kelly <ian.g.kelly@gmail.com> - 2013-06-22 12:57 -0600
                Re: Default Value Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2013-06-22 18:48 -0400
                Re: Default Value Rotwang <sg552@hotmail.co.uk> - 2013-06-22 00:40 +0100
                Re: Default Value Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-21 18:15 -0700
                Re: Default Value Chris Angelico <rosuav@gmail.com> - 2013-06-22 11:37 +1000
                Re: Default Value Ian Kelly <ian.g.kelly@gmail.com> - 2013-06-21 19:42 -0600
                Re: Default Value Ian Kelly <ian.g.kelly@gmail.com> - 2013-06-21 19:38 -0600
                Re: Default Value Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-21 19:40 -0700
                Re: Default Value Rotwang <sg552@hotmail.co.uk> - 2013-06-22 03:01 +0100
                Re: Default Value Chris Angelico <rosuav@gmail.com> - 2013-06-22 12:18 +1000
                Re: Default Value Rotwang <sg552@hotmail.co.uk> - 2013-06-22 03:25 +0100
                Re: Default Value Rotwang <sg552@hotmail.co.uk> - 2013-06-22 18:19 +0100
                Re: Default Value Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-22 11:49 -0700
                Re: Default Value Rotwang <sg552@hotmail.co.uk> - 2013-06-23 01:49 +0100
        Re: Default Value rusi <rustompmody@gmail.com> - 2013-06-20 10:12 -0700
          Re: Default Value Chris Angelico <rosuav@gmail.com> - 2013-06-21 03:19 +1000
            Re: Default Value rusi <rustompmody@gmail.com> - 2013-06-20 10:30 -0700
          Re: Default Value Ian Kelly <ian.g.kelly@gmail.com> - 2013-06-20 11:57 -0600
            Re: Default Value rusi <rustompmody@gmail.com> - 2013-06-20 11:15 -0700
            Re: Default Value Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-21 01:08 +0000
              Re: Default Value Tim Chase <python.list@tim.thechases.com> - 2013-06-20 20:26 -0500
                Re: Default Value Roy Smith <roy@panix.com> - 2013-06-20 21:40 -0400
                Re: Default Value Tim Chase <python.list@tim.thechases.com> - 2013-06-20 21:02 -0500
          Re: Default Value Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-20 11:07 -0700
            Re: Default Value alex23 <wuwei23@gmail.com> - 2013-06-21 10:55 +1000
          Re: Default Value 88888 Dihedral <dihedral88888@gmail.com> - 2013-06-20 19:18 -0700
          Re: Default Value Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-21 02:26 +0000
          Re: Default Value "Lefavor, Matthew (GSFC-582.0)[MICROTEL LLC]" <matthew.lefavor@nasa.gov> - 2013-06-20 17:28 -0500
            Re: Default Value Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-21 08:17 -0700
        Re: Default Value Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-21 01:28 +0000
  Re: Default Value Gary Herron <gherron@digipen.edu> - 2013-06-19 12:57 -0700
  Re: Default Value Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-20 01:17 +0000

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