Can anybody on a 64-bit system confirm?
I'm on 64-bit Debian:
In [11]: arr=N.arange(10,dtype=N.uint)
In [12]: arr.dtype.kind Out[12]: 'u'
In [13]: arr.dtype.itemsize Out[13]: 4
In [14]: arr=N.arange(10,dtype=N.long)
In [15]: arr.dtype.kind Out[15]: 'i'
In [16]: arr.dtype.itemsize Out[16]: 8
Ack! That was on the wrong machine (32-bit Debian). Here is the 64-bit version: In [2]: arr=N.arange(10,dtype=N.uint) In [3]: arr.dtype.kind Out[3]: 'u' In [4]: arr.dtype.itemsize Out[4]: 8 In [5]: arr=N.arange(10,dtype=N.long) In [6]: arr.dtype.kind Out[6]: 'i' In [7]: arr.dtype.itemsize Out[7]: 8 Sorry about that, Scott -- Scott M. Ransom Address: NRAO Phone: (434) 296-0320 520 Edgemont Rd. email: sransom@nrao.edu Charlottesville, VA 22903 USA GPG Fingerprint: 06A9 9553 78BE 16DB 407B FFCA 9BFA B6FF FFD3 2989