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Re: Unexpected scientific notation

 
 
Paul McNett
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      01-08-2009
Robert Kern wrote:
> Paul McNett wrote:
>> One of my users has reported that my app is giving them scientific
>> notation instead of decimal notation for one specific value among many
>> that display properly. I am unable to reproduce on my end, and this is
>> the first I've heard of anything like this since the app's launch 2
>> years ago.
>>
>> The app bundles python 2.5.2 using py2exe.
>>
>> It displays '3E+1' instead of '30.0'.
>>
>> As I can't reproduce I'm looking for an idea brainstorm of what could
>> be causing this. What would be choosing to display such a normal
>> number in scientific notation?
>>
>> Ideas?

>
> Locales? Do you at last know the code that's responsible for formatting
> the number?


I do use locale.format, but I use it for all numbers, and only one such number
displays in scientific notation - the rest are fine. Here's the code:

1355 def uom_string(self, val):
1356 """Given a decimal value, format it for string display."""
1357 if self.unit_of_measure == "inches":
1358 fd = dabo.dAppRef.getSSPref("fraction_display")
1359 if fd == "decimal":
1360 return '%s"' % locale.format("%.5f", val.normalize(), True)
1361 else:
1362 return '%s"' % fractions.getImperial(val)
1363 elif self.unit_of_measure == "millimeters":
1364 #return u"%s\u339C" % self.uom_round(val)
1365 return "%smm" % locale.format("%.1f", self.uom_round(val), True)
1366 else:
1367 raise ValueError, "Unit of Measure '%s' not recognized." %
self.unit_of_measure

In this case, self.unit_of_measure == "inches" and fd == "decimal".

Thanks
Paul

 
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