Using Python from Cocoa App via PyObjc - numbers dont match...

[Gabriel Genellina]

At Wednesday 8/11/2006 22:22, sapsi wrote:

>I managed to create a python class and instantiate that from my
>Objective C Cocoa App (its not a python app). [...]
>The first output in the console is 40.4 and the second
>-40.40000152587891.
>
>If i change the NSLog(s)  to "%f",[n floatValue] (and the second
>likewise) the first is 40.400002 and the second is -40.400002.
>
>Why does this happen?

This is mostly independent on the language in use.
Numbers like 40.4 don't have, in general, an exact binary representation.
See http://docs.python.org/tut/node16.html


-- 
Gabriel Genellina
Softlab SRL 

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