[Numpy-discussion] nan, warning and error modes

[Robert Kern]

David Cournapeau wrote:
> Hi,
> 
>     I am developing some numpy code, which sometimes fail because of 
> nan. This is likely to be due to some bad coding on my side, and as such 
> any NaN is a bug for this particular piece of code.
>     Is there a way to get a warning when the first Nan is detected in 
> the code (or even a faulty assertion) ? It looks like there are some 
> variables/functions related to that in numpy, but I didn't find any 
> useful document on the matter, either in the numpy book nor on the scipy 
> website.

seterr(invalid='warning')

Described in section "9.1.4 Error Handling" of the _Guide to NumPy_ (dated
2006-12-07).

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco