Re: Overriding a global

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From	Ian Kelly <ian.g.kelly@gmail.com>
Date	2011-12-12 22:50 -0700
Subject	Re: Overriding a global
Newsgroups	comp.lang.python
Message-ID	<mailman.3579.1323755476.27778.python-list@python.org> (permalink)

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On Mon, Dec 12, 2011 at 4:48 PM, Joshua Landau
<joshua.landau.ws@gmail.com> wrote:
> Rebinding logger locally in a function is really no
> different to a subclass rebinding a variable from its main class using that
> class' value. The only difference is that, in that case, you have an
> alternate binding to the original value.

No, there is another difference, the reason for rebinding the name.
In a subclass, you would rebind a class attribute because that
particular attribute, which you need to change, is used and expected
by external code, either in the base class or in code that uses its
API (or both).  Local variables in functions, on the other hand, are
not externally visible, so there is no need to do this in order to
conform to the expectations of external code.  All it does in that
case is to sow potential confusion.

Thread

Overriding a global Roy Smith <roy@panix.com> - 2011-12-10 15:47 -0500
  Re: Overriding a global MRAB <python@mrabarnett.plus.com> - 2011-12-10 21:07 +0000
    Re: Overriding a global Roy Smith <roy@panix.com> - 2011-12-10 16:10 -0500
      Re: Overriding a global Jean-Michel Pichavant <jeanmichel@sequans.com> - 2011-12-12 12:13 +0100
        Re: Overriding a global Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-12-12 21:28 +0000
          Re: Overriding a global Dave Angel <d@davea.name> - 2011-12-12 16:43 -0500
            Re: Overriding a global Ben Finney <ben+python@benfinney.id.au> - 2011-12-13 09:27 +1100
              Re: Overriding a global Dave Angel <d@davea.name> - 2011-12-12 20:46 -0500
              Re: Overriding a global Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-12-13 01:48 +0000
              Re: Overriding a global Ian Kelly <ian.g.kelly@gmail.com> - 2011-12-12 22:50 -0700
              Re: Overriding a global Joshua Landau <joshua.landau.ws@gmail.com> - 2011-12-13 08:34 +0000
              Re: Overriding a global Ian Kelly <ian.g.kelly@gmail.com> - 2011-12-13 12:34 -0700
              Re: Overriding a global Ian Kelly <ian.g.kelly@gmail.com> - 2011-12-13 12:54 -0700
          Re: Overriding a global Jean-Michel Pichavant <jeanmichel@sequans.com> - 2011-12-13 10:54 +0100
            Re: Overriding a global Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-12-13 11:15 +0000
              Re: Overriding a global Jean-Michel Pichavant <jeanmichel@sequans.com> - 2011-12-13 14:30 +0100
              Re: Overriding a global Jean-Michel Pichavant <jeanmichel@sequans.com> - 2011-12-14 11:14 +0100
              Re: Overriding a global Chris Angelico <rosuav@gmail.com> - 2011-12-14 21:32 +1100
              Re: Overriding a global Jean-Michel Pichavant <jeanmichel@sequans.com> - 2011-12-14 13:05 +0100
                Re: Overriding a global Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-12-14 12:53 +0000
                Re: Overriding a global Jean-Michel Pichavant <jeanmichel@sequans.com> - 2011-12-14 14:35 +0100
              Re: Overriding a global Chris Angelico <rosuav@gmail.com> - 2011-12-14 23:21 +1100
              Re: Overriding a global Jean-Michel Pichavant <jeanmichel@sequans.com> - 2011-12-14 18:06 +0100
  Re: Overriding a global Terry Reedy <tjreedy@udel.edu> - 2011-12-10 19:14 -0500
  Re: Overriding a global Terry Reedy <tjreedy@udel.edu> - 2011-12-10 19:19 -0500
  Re: Overriding a global Peter Otten <__peter__@web.de> - 2011-12-11 09:14 +0100
  Re: Overriding a global Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2011-12-13 10:15 +0100

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