[issue1559] round() does not

[Guido van Rossum]

Guido van Rossum added the comment:

travelgirl: the 'decimal' module is designed to deal with this. Note
that there's a difference between BCD (which can represent decimal
numbers exactly) and binary (which can't, in general).

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nosy: +gvanrossum

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<http://bugs.python.org/issue1559>
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