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From: Ian Kelly <ian.g.kelly@gmail.com>
Date: Mon, 12 Dec 2011 22:50:44 -0700
Subject: Re: Overriding a global
To: Joshua Landau <joshua.landau.ws@gmail.com>
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Cc: python-list@python.org, Ben Finney <ben+python@benfinney.id.au>
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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.