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Re: Idiosyncratic python

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From Ben Finney <ben+python@benfinney.id.au>
Subject Re: Idiosyncratic python
Date Thu, 24 Sep 2015 16:54:14 +1000
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Steven D'Aprano <steve+comp.lang.python@pearwood.info> writes:

> On Thursday 24 September 2015 16:16, Paul Rubin wrote:
>
> > Steven D'Aprano <steve+comp.lang.python@pearwood.info> writes:
> >> for k, v in mydict.items():
> >>     del(k)
>
> […] The obvious intent is to iterate over the *values* of the
> dictionary, but the coder didn't know about values, so he iterated
> over (key,value) pairs, then deleted the key local variable (not the
> key in the dict!) to keep the namespace clean.

That's not obvious to me. It's plausible, now that you say it. I find it
also plausible, though, that the author is under the mistaken impression
that the key and value must both be deleted, and has found a way that
appears to do that.

Perhaps what we're illustrating here is exactly why such idiosyncratic
code *is* bad: it obscures the intent of the code for programmers who
know idiomatic Python.

And those readers are hopefully the ones the author should be trying to
communicate to, on the theory that we've all got the goal to become a
programmer who knows idiomatic Python.

-- 
 \        “The fact of your own existence is the most astonishing fact |
  `\    you'll ever have to confront. Don't dare ever see your life as |
_o__)    boring, monotonous, or joyless.” —Richard Dawkins, 2010-03-10 |
Ben Finney

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Thread

Idiosyncratic python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-09-24 16:02 +1000
  Re: Idiosyncratic python Paul Rubin <no.email@nospam.invalid> - 2015-09-23 23:16 -0700
    Re: Idiosyncratic python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-09-24 16:35 +1000
      Re: Idiosyncratic python Ben Finney <ben+python@benfinney.id.au> - 2015-09-24 16:54 +1000
        Re: Idiosyncratic python Steven D'Aprano <steve@pearwood.info> - 2015-09-25 11:08 +1000
      Re: Idiosyncratic python Terry Reedy <tjreedy@udel.edu> - 2015-09-24 02:54 -0400
  Re: Idiosyncratic python wxjmfauth@gmail.com - 2015-09-24 00:06 -0700
    Re: Idiosyncratic python Laurent Pointal <laurent.pointal@free.fr> - 2015-09-24 19:50 +0200
      Re: Idiosyncratic python Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-09-24 21:05 +0100
  Re: Idiosyncratic python jmp <jeanmichel@sequans.com> - 2015-09-24 11:12 +0200
  Re: Idiosyncratic python Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-09-24 14:09 +0100
  Re: Idiosyncratic python jmp <jeanmichel@sequans.com> - 2015-09-24 16:07 +0200
  Re: Idiosyncratic python Ian Kelly <ian.g.kelly@gmail.com> - 2015-09-24 08:26 -0600
  Re: Idiosyncratic python Chris Angelico <rosuav@gmail.com> - 2015-09-25 02:57 +1000
  Re: Idiosyncratic python jmp <jeanmichel@sequans.com> - 2015-09-24 20:04 +0200
  Re: Idiosyncratic python Ian Kelly <ian.g.kelly@gmail.com> - 2015-09-24 12:19 -0600
  Re: Idiosyncratic python Ned Batchelder <ned@nedbatchelder.com> - 2015-09-24 13:46 -0700
    Re: Idiosyncratic python Laura Creighton <lac@openend.se> - 2015-09-24 23:08 +0200
    Re: Idiosyncratic python Chris Angelico <rosuav@gmail.com> - 2015-09-25 07:49 +1000
    Re: Idiosyncratic python Steven D'Aprano <steve@pearwood.info> - 2015-09-25 10:55 +1000
  Re: Idiosyncratic python sohcahtoa82@gmail.com - 2015-09-24 15:32 -0700
  Re: Idiosyncratic python Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-09-25 00:40 +0100
  Re: Idiosyncratic python Akira Li <4kir4.1i@gmail.com> - 2015-09-25 03:04 +0300
  Re: Idiosyncratic python Steven D'Aprano <steve@pearwood.info> - 2015-09-25 10:08 +1000

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