[Numpy-discussion] Numpy large array bug
Kashyap Ashwin
Ashwin.Kashyap at thomson.net
Mon Sep 21 13:45:27 EDT 2009
Hello,
I have downloaded numpy 1.3rc2 sources and compiled it on Ubuntu Hardy
Linux x86_64. numpy.test() seems to run ok as well.
Here is the bug I can reproduce
import numpy as np
a=np.zeros((2*1024*1024*1024 + 10000), dtype="uint8")
a[:]=1
# returns immediately
a.mean()
0.0
print a
[0 0 0 ..., 0 0 0]
The bug only happens when the nElements > 2G (2^31). So for
dtype=uint16/32, the bug happens when size is greater thatn 2^31 as
well.
Can someone please tell me if I can find a patch for this? I checked the
mailing list and trac and I cannot find any related bug.
Thanks,
Ashwin
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