[Numpy-discussion] How to tell whether I am using 32 bit or 64 bit numpy?

[John Reid]

I imagine I'm using 64 bit numpy as I made a vanilla install from recent 
source on a 64 bit box but how can I tell for sure? I have some problems 
creating large arrays.


In [29]: a=numpy.empty((1024, 1024, 1024), dtype=int8)
works just fine


In [30]: a=numpy.empty((1024, 1024, 2048), dtype=int8)
gives me the dimensions too large error:
ValueError: dimensions too large.


In [31]: a=numpy.empty((1024, 1024, 2047), dtype=int8)
gives me a memory error:
MemoryError:


How can I create these large arrays? Do I need to make sure I have a 64 
bit python? How do I do that?


Thanks in advance,
John.