[Numpy-discussion] strange bug

Johannes Loehnert a.u.r.e.l.i.a.n at gmx.net
Tue Jun 20 01:08:50 CDT 2006


Hi,

> ## Output:
> numpy.__version__:  0.9.8
> y:  [ 0.  1.  2.  3.  4.  5.  6.  7.  8.  9.]
> y**2:  [  0.   1.   4.   9.  16.  25.  36.  49.  64.  81.]
> z:  [ 0.  1.  2.  3.  4.  5.  6.  7.  8.  9.]
> z**2:  [  0.00000000e+00   1.00000000e+00   1.60000000e+01   8.10000000e+01
>    2.56000000e+02   6.25000000e+02   1.29600000e+03   2.40100000e+03
>    4.09600000e+03   6.56100000e+03]

obviosly the last is z**4. dtypes are the same for y and z (float64).

One addition:

In [5]: z = arange(10, dtype=float)

In [6]: z **= 1

In [7]: z
zsh: 18263 segmentation fault  ipython


- Johannes




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