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Date: Sat, 10 May 2014 12:28:20 -0700
From: Ethan Furman <ethan@stoneleaf.us>
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Subject: Re: Values and objects
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Xref: csiph.com comp.lang.python:71268

On 05/10/2014 12:22 PM, MRAB wrote:
>
> UnboundLocalError is like NameError, except that Python knows that the
> name is local because somewhere in the function you're binding to that
> name and you haven't said that it's global or nonlocal. Having a
> different exception for that case makes it clearer to the user what the
> problem is.

Absolutely.  At one point NameError was raised in both cases, which could be very confusing to track down.

--
~Ethan~