Comment 8 for bug 882036

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Xavier (Open ERP) (xmo-deactivatedaccount) wrote : Re: rounding error

> then I saw that Python has the same problems as well with Decimal …

What makes you believe that?

    >>> from decimal import Decimal as d, ROUND_HALF_UP
    >>> (d('0.565') * 100).quantize(d(1), ROUND_HALF_UP) / 100
    Decimal('0.57')
    >>> (d('0.575') * 100).quantize(d(1), ROUND_HALF_UP) / 100
    Decimal('0.58')

Decimal also supports rounding directly, instead of doing arbitrary computations:

    >>> d('0.565').quantize(d('0.01'), ROUND_HALF_UP)
    Decimal('0.57')
    >>> d('0.575').quantize(d('0.01'), ROUND_HALF_UP)
    Decimal('0.58')