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Re: Dynamic variable creation from string

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Date Fri, 09 Dec 2011 12:01:01 -0800
From Ethan Furman <ethan@stoneleaf.us>
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To Massi <massi_srb@msn.com>, python-list@python.org
Subject Re: Dynamic variable creation from string
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Massi wrote:
> Thank you all for your replies, first of all my Sum function was an
> example simplifying what I have to do in my real funciton. In general
> the D dictionary is complex, with a lot of keys, so I was searching
> for a quick method to access all the variables in it without doing the
> explicit creation:
> 
> a, b, c = D['a'], D['b'], D['c']
> 
> and without using directly the D dictionary (boring...).
> When I talked about nested function I meant both cases Chris, but this
> is not a really tighten bound.
> I tried to follow the hints of Chris together with some help by google
> and used the following code:
> 
> for k in D : exec "%s = D[k]" %k
> 
> That seems to do the trick, but someone speaks about "dirty code", can
> anyone point me out which problems this can generate?
> Again, thank you for your help!

Besides the serious security issues, this method won't make the problem 
any better in Python 3.

~Ethan~

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Thread

Dynamic variable creation from string Massi <massi_srb@msn.com> - 2011-12-07 09:09 -0800
  Re: Dynamic variable creation from string John Gordon <gordon@panix.com> - 2011-12-07 17:45 +0000
    Re: Dynamic variable creation from string MRAB <python@mrabarnett.plus.com> - 2011-12-07 18:07 +0000
  Re: Dynamic variable creation from string "Waldek M." <wm@localhost.localdomain> - 2011-12-07 18:46 +0100
  Re: Dynamic variable creation from string Chris Angelico <rosuav@gmail.com> - 2011-12-08 04:52 +1100
  Re: Dynamic variable creation from string Terry Reedy <tjreedy@udel.edu> - 2011-12-07 17:59 -0500
  Re: Dynamic variable creation from string Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-12-08 00:03 +0000
    Re: Dynamic variable creation from string Terry Reedy <tjreedy@udel.edu> - 2011-12-07 19:27 -0500
      Re: Dynamic variable creation from string Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-12-08 01:59 +0000
      Re: Dynamic variable creation from string Jussi Piitulainen <jpiitula@ling.helsinki.fi> - 2011-12-08 10:54 +0200
        Re: Dynamic variable creation from string Massi <massi_srb@msn.com> - 2011-12-09 01:55 -0800
          Re: Dynamic variable creation from string Peter Otten <__peter__@web.de> - 2011-12-09 12:27 +0100
          Re: Dynamic variable creation from string Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-12-09 11:59 +0000
            Re: Dynamic variable creation from string Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-12-09 12:03 +0000
            Re: Dynamic variable creation from string Chris Angelico <rosuav@gmail.com> - 2011-12-09 23:08 +1100
          Re: Dynamic variable creation from string Ethan Furman <ethan@stoneleaf.us> - 2011-12-09 12:01 -0800
          Re: Dynamic variable creation from string Nobody <nobody@nowhere.com> - 2011-12-11 06:42 +0000
            Re: Dynamic variable creation from string alex23 <wuwei23@gmail.com> - 2011-12-11 19:31 -0800
              Re: Dynamic variable creation from string Ethan Furman <ethan@stoneleaf.us> - 2011-12-11 21:00 -0800
                Re: Dynamic variable creation from string alex23 <wuwei23@gmail.com> - 2011-12-11 22:50 -0800
    Re: Dynamic variable creation from string Chris Angelico <rosuav@gmail.com> - 2011-12-08 14:13 +1100
  Re: Dynamic variable creation from string alex23 <wuwei23@gmail.com> - 2011-12-11 23:11 -0800
    Re: Dynamic variable creation from string 88888 Dihedral <dihedral88888@googlemail.com> - 2011-12-12 04:43 -0800
    Re: Dynamic variable creation from string 88888 Dihedral <dihedral88888@googlemail.com> - 2011-12-12 04:49 -0800
      Re: Dynamic variable creation from string alex23 <wuwei23@gmail.com> - 2011-12-12 15:45 -0800
        Re: Dynamic variable creation from string Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-12-13 01:35 +0000
          Re: Dynamic variable creation from string 88888 Dihedral <dihedral88888@googlemail.com> - 2011-12-13 06:21 -0800

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