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From: Paul Rubin <no.email@nospam.invalid>
Newsgroups: comp.lang.python
Subject: Re: Odd ValueError using float
Date: Fri, 13 Mar 2015 19:33:20 -0700
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emile <emile@fenx.com> writes:
> *** NameError: name 'val' is not defined
> (Pdb) l
> 139         try:
> 140             val = round(float(decval),1)
> 141         except:
> 142             import pdb; pdb.set_trace()

If 'float' or 'round' throw an exception, the assignment to 'val' never
happens, so 'val' is undefined.  Try examining the value of 'decval' in
the debugger to see what is making the conversion fail.