<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Tue, Oct 13, 2015 at 5:08 PM, Marten van Kerkwijk <span dir="ltr"><<a href="mailto:m.h.vankerkwijk@gmail.com" target="_blank">m.h.vankerkwijk@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><span class=""><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><p dir="ltr">Maybe not directly relevant, but also very clearly why one should ideally not use these a </p></blockquote></span></div></div></div></blockquote><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><span class=""><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><p dir="ltr">all! </p></blockquote></span></div></div></div></blockquote><div>I wouldn't say not at all -- I'd say "not in some circumstances"</div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><span class=""><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><p dir="ltr">Perhaps even less relevant, but if you do need absolute times (and thus work with UTC or TAI or GPS), have a look at astropy's `Time` class. It does use two doubles,</p></blockquote></span></div></div></div></blockquote><div>interesting -- I wonder why not two integers? </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><span class=""><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><p dir="ltr"> but with that maintains "sub-nanosecond precision over times spanning
the age of the universe" [1].</p></blockquote></span></div></div></div></blockquote><div>well, we do all need that!</div><div><br></div><div>Seriously, though -- if we are opening all this up, maybe it's worth considering other options, rather than kludging datetime64 -- particularly if there is something someone has already implemented and tested...</div><div><br></div><div>But for now, Stephan's patches to make datetime64 far more useful and easy are very welcome!</div><div><br></div><div>-CHB</div><div><br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><div>[1] <a href="http://docs.astropy.org/en/latest/time/index.html" target="_blank">http://docs.astropy.org/en/latest/time/index.html</a><br></div></div></div></div>
<br>_______________________________________________<br>
NumPy-Discussion mailing list<br>
<a href="mailto:NumPy-Discussion@scipy.org">NumPy-Discussion@scipy.org</a><br>
<a href="https://mail.scipy.org/mailman/listinfo/numpy-discussion" rel="noreferrer" target="_blank">https://mail.scipy.org/mailman/listinfo/numpy-discussion</a><br>
<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature"><br>Christopher Barker, Ph.D.<br>Oceanographer<br><br>Emergency Response Division<br>NOAA/NOS/OR&R (206) 526-6959 voice<br>7600 Sand Point Way NE (206) 526-6329 fax<br>Seattle, WA 98115 (206) 526-6317 main reception<br><br><a href="mailto:Chris.Barker@noaa.gov" target="_blank">Chris.Barker@noaa.gov</a></div>
</div></div>