format a measurement result and its error in "scientific" way
Ian Kelly
ian.g.kelly at gmail.com
Thu Feb 16 19:29:27 EST 2012
On Thu, Feb 16, 2012 at 3:21 PM, Daniel Fetchinson
<fetchinson at googlemail.com> wrote:
> Thanks, it's simpler indeed, but gives me an error for value=1.267, error=0.08:
>
> Traceback (most recent call last):
> File "/home/fetchinson/bin/format_error", line 26, in <module>
> print format_error( sys.argv[1], sys.argv[2] )
> File "/home/fetchinson/bin/format_error", line 9, in format_error
> error_scale += error.scaleb( -error_scale ).to_integral( ).adjusted( )
> File "/usr/lib64/python2.6/decimal.py", line 3398, in scaleb
> ans = self._check_nans(other, context)
> File "/usr/lib64/python2.6/decimal.py", line 699, in _check_nans
> other_is_nan = 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.
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