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Fri Jan 4 18:25:32 CET 2008 · https://mail.python.org/pipermail/python-dev/2008-January/075866.html

    Guido> Rounding 0.5 to 0 is a new fad, called round-to-even, or
    Guido> statistician's rounding.  Read
    Guido> http://en.wikipedia.org/wiki/Rounding .  It's a standard, and
    Guido> more correct when doing statistical calculations.  That's why
    Guido> we've chosen it for Python 3.0. But it should not bleed into
    Guido> Python 2.6.

Thanks for the pointer.  Given that it's been an ASTM standard since 1940
and apparently in fairly common use since the early 1900s, I wonder why it's
not been more widely used in the past in programming languages.

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[Python-Dev] Return type of round, floor, and ceil in 2.6