[Numpy-discussion] isnan() equivalent for np.NaT?

Gerrit Holl gerrit.holl at gmail.com
Mon Jul 18 18:39:15 EDT 2016

On 18 July 2016 at 22:20, Scott Sanderson <ssanderson at quantopian.com> wrote:
> I'm working on upgrading Zipline (github.com/quantopian/zipline) to the
> latest numpy, and I'm getting a FutureWarnings about the upcoming change in
> the behavior of comparisons on np.NaT.  I'd like to be able to do checks for
> NaT in a way that's forwards-compatible, but I couldn't find a function
> analogous to `np.isnan` for NaT.  Am I missing something that already
> exists?  If not, is there interest in such a function? I'd like to be able
> to pre-emptively fix the warnings in Zipline so that we're ready when the
> change actually happens, but it doesn't seem like the necessary tools are
> available right now.

Hi Scott,

see https://github.com/numpy/numpy/issues/5610


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