Where is the correct round() method?

[pigmartian]

it could be that 3.0 is using "banker's rounding" --- rounding to the 
even digit.  the idea behind it behind it being to reduce error 
accumulation when working with large sets of values.


> Works for me on Python 2.5 on Linux running on "Intel(R) Core(TM)2 Duo 
> CPU".  What system are you on?
> 
> 
> It could be that 2.5 is really 2.49999... which would round down to 2, 
> but on any modern CPU (using IEEE floating point), 2.5 should be 
> representable exactly.
> 
>