[Numpy-discussion] numpy on windows 64 bit

Christoph Gohlke cgohlke@uci....
Tue Jul 6 12:57:04 CDT 2010

On 7/5/2010 4:19 AM, Robin wrote:
> On Mon, Jul 5, 2010 at 12:09 PM, David Cournapeau<cournape@gmail.com>  wrote:
>> Short of saying what those failures are, we can't help you,
> Thanks for reply... Somehow my message got truncated - I had written
> more detail about the errors!
>>> I noticed that on windows sys.maxint is the 32bit value (2147483647
>> This is not surprising: sys.maxint gives you the max value of a long,
>> which is 32 bits even on 64 bits on windows.
> I just got to figuring this out... But it makes some problems. The
> main one I'm having is that I assume because of this problem array
> shapes are longs instead of ints (ie x.shape[0] is a long).
> This breaks np.random.permutation(x.shape[1]) which I use all over the
> place (I opened a ticket for this, #1535). Something I asked in the
> previous mail that got lost is what is the best cross platform way of
> doing this?
> np.random.permutation(int(x.shape[1]))?

I proposed a fix at http://projects.scipy.org/numpy/ticket/1535. Does it 
work for you?

> Actually that and the problems with scipy.sparse (spsolve doesn't
> work) cover all of the errors I'm seeing... (I detailed those in a
> seperate mail to the scipy list).


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