[Numpy-discussion] nan_to_num() SystemException

Tim Leslie tim.leslie at gmail.com
Sun Jul 2 05:53:58 CDT 2006

Hi All,

The following script:

import numpy as N
print N.__version__
a = N.array([1,2,3,4], dtype=N.float64)
a.dtype = a.dtype.newbyteorder('big')
print N.nan_to_num(a)

gives the following exception:
Traceback (most recent call last):
  File "memmap_nan.py", line 5, in ?
    print N.nan_to_num(a)
  File "/usr/lib/python2.4/site-packages/numpy/lib/type_check.py",
line 127, in nan_to_num
    y[are_inf] = maxf
SystemError: error return without exception set

Could someone shed some light on this? I'm at a bit of a loss as where
to go. I had a poke around inside type_check.py but didn't get very
far. I confirmed that are_inf in type_check.py is [False, False,
False, False], as expected. I changed the value of maxf to different
values (0, maxf+1, maxf-1, maxf+0.00000001, minf, 37), and with any of
these different values the SystemError goes away. Beyond that, I'm not
sure how to chase this one down.


Tim Leslie

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