format a measurement result and its error in "scientific" way

Daniel Fetchinson fetchinson at googlemail.com
Fri Feb 17 11:00:27 CET 2012


>> 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.

Great, with python 2.7 it works indeed!

Cheers,
Daniel


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