Hi Dan, On Wed, Jun 4, 2008 at 8:50 PM, Dan Yamins <[EMAIL PROTECTED]> wrote:
> > > > >> Try >> >> In [3]: numpy.dtype(numpy.uintp).itemsize >> Out[3]: 4 >> >> which is the size in bytes of the integer needed to hold a pointer. The >> output above is for 32 bit python/numpy. >> >> Chuck >> > > Check, the answer is 4, as you got for the 32-bit. What would the answer > be on a 64-bit architecture? Why is this diagnostic? > On 64 bit ubuntu In [1]: import numpy In [2]: numpy.dtype(numpy.uintp).itemsize Out[2]: 8 This is diagnostic because a pointer of 4 bytes, 32 bits, can only address 4 GiB whereas an 8 byte pointer has 64 bits to address memory. So it looks like your numpy was compiled by a 32 python executable. I've been been googling this a bit and it looks like the standard executable python on the mac is 32 bits, even though 64 bit libraries are available if you can get a 64 bit version up and running. A lot of libraries are available in both 32 and 64 bit versions. Chuck > > Thanks! > Dan > > > _______________________________________________ > Numpy-discussion mailing list > Numpy-discussion@scipy.org > http://projects.scipy.org/mailman/listinfo/numpy-discussion > >
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