[Numpy-discussion] Oddity with numpy.int64 integer division
Christian Marquardt
christian@marquardt...
Mon Apr 23 15:20:48 CDT 2007
Dear all,
this is odd:
>>> import numpy as np
>>> fact = 28250000L * 86400L
>>> nn = np.array([-20905000L])
>>> nn
array([-20905000], dtype=int64)
>>> nn[0] // fact
0
But:
>>> long(nn[0]) // fact
-1L
Is this a bug in numpy, or in python's implementation of longs? I would
think both should give the same, really... (Python 2.5, numpy 1.0.3dev3725,
Linux, Intel compilers...)
Many thanks for any ideas / advice,
Christian
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