[Numpy-discussion] weird numpy/pickle problem
Brian Blais
bblais@bryant....
Fri Nov 2 11:58:33 CDT 2007
Hello,
I encountered a peculiar numpy and pickle problem. My version:
Python 2.5.1 (r251:54869, Apr 18 2007, 22:08:04) Mac OS X Tiger
In [2]:numpy.__version__
Out[2]:'1.0.4.dev3869'
I pickle a matrix, and reload it. Some operations work ok, but
others give a hardware error and a crash!
I boiled it down to the code below. Can anyone reproduce (or not)
this error?
thanks,
bb
--
Brian Blais
bblais@bryant.edu
http://web.bryant.edu/~bblais
=======================================================================
from numpy import matrix,random
import pickle
w_test=matrix(random.rand(3,21))
fid=open('blah0_test.pickle','wb')
pickle.dump(w_test,fid,0)
fid.close()
fid=open('blah0_test.pickle','rb')
w_xh=pickle.load(fid)
fid.close()
# this works
print w_xh*w_xh.T
#this works
x=matrix(random.rand(2,21))
print x*w_xh.T
# this gives a hardware error!
x=matrix([0]*21)
print x*w_xh.T
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