[Numpy-discussion] integer division rule?

Charles R Harris charlesr.harris@gmail....
Sat Mar 13 19:57:47 CST 2010


On Sat, Mar 13, 2010 at 3:04 PM, Pauli Virtanen <pav@iki.fi> wrote:

> la, 2010-03-13 kello 15:32 -0500, Alan G Isaac kirjoitti:
> > Francesc Altet once provided an example that for integer
> > division, numpy uses the C99 rule: round towards 0.
> > This is different than Python's rule for integer division:
> > round towards negative infinity.
> >
> > But I cannot reproduce his example. (NumPy 1.3.)
> > Did this behavior change at some point?
>
> It was changed in r5888. What the rationale was is not clear from the
> commit message.
>
>
The change was before that, the logic of the loop after r5888 is the same as
before. I suspect the change was made, whenever that was, in order to
conform to python.

Chuck
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