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From: Ian Kelly <ian.g.kelly@gmail.com>
Date: Mon, 6 Jun 2011 18:31:36 -0600
Subject: Re: new string formatting with local variables
To: Ben Finney <ben+python@benfinney.id.au>
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Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:7121

On Mon, Jun 6, 2011 at 6:11 PM, Ben Finney <ben+python@benfinney.id.au> wrote:
>> You must use prefix-** in the call to unpack the mapping as keyword
>> arguments. Note that using locals() like this isn't best-practice.
>
> Who says so, and do you find their argument convincing? Do you have a
> reference for that so we can see why?

http://stackoverflow.com/questions/1550479/python-is-using-vars-locals-a-good-practice