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From: Ian Kelly <ian.g.kelly@gmail.com>
Date: Thu, 16 Feb 2012 17:29:27 -0700
Subject: Re: format a measurement result and its error in "scientific" way
To: Daniel Fetchinson <fetchinson@googlemail.com>
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On Thu, Feb 16, 2012 at 3:21 PM, Daniel Fetchinson
<fetchinson@googlemail.com> wrote:
> Thanks, it's simpler indeed, but gives me an error for value=3D1.267, err=
or=3D0.08:
>
> Traceback (most recent call last):
> =A0File "/home/fetchinson/bin/format_error", line 26, in <module>
> =A0 =A0print format_error( sys.argv[1], sys.argv[2] )
> =A0File "/home/fetchinson/bin/format_error", line 9, in format_error
> =A0 =A0error_scale +=3D error.scaleb( -error_scale ).to_integral( =A0).ad=
justed( =A0)
> =A0File "/usr/lib64/python2.6/decimal.py", line 3398, in scaleb
> =A0 =A0ans =3D self._check_nans(other, context)
> =A0File "/usr/lib64/python2.6/decimal.py", line 699, in _check_nans
> =A0 =A0other_is_nan =3D other._isnan()
> AttributeError: 'int' object has no attribute '_isnan'
>
> Which version of python are you using?

2.7.1.  At a guess, it's failing because scaleb() (which was new in
2.6) is buggily expecting a decimal argument, but adjusted() returns an int=
.
Convert the results of the two adjusted() calls to decimals, and I
think it should be fine.