<div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">сб, 2 февр. 2019 г. в 07:33, Steven D'Aprano <<a href="mailto:steve@pearwood.info">steve@pearwood.info</a>>:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><br>
I didn't say anything about a vector type.<br>
<br></blockquote><div><br></div><div>I agree you did not say. But since you started a new thread from the one where the vector type was a little discussed, it seemed to me that it is appropriate to mention it here. Sorry about that.</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">> Therefore, it allows you to ensure that the method is present for each<br>
> element in the vector. The first given example is what numpy is all about<br>
> and without some guarantee that L consists of homogeneous data it hardly<br>
> make sense.<br>
<br>
Of course it makes sense. Even numpy supports inhomogeneous data:<br>
<br>
py> a = np.array([1, 'spam'])<br>
py> a<br>
array(['1', 'spam'],<br>
dtype='|S4')<br>
<br></blockquote><div><br></div><div>Yes, numpy, at some degree, supports heterogeneous arrays. But not in the way you brought it. Your example just shows homogeneous array of type `'|S4'`. In the same way as `np.array([1, 1.234])` will be homogeneous. Of course you can say - np.array([1, 'spam'], dtype='object'), but in this case it will also be homogeneous array, but of type `object`.</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
Inhomogeneous data may rule out some optimizations, but that hardly <br>
means that it "doesn't make sense" to use it.<br></blockquote><div><br></div><div>I did not say that it "doesn't make sense". I only said that you should be lucky to call `..method()` on collections of heterogeneous data. And therefore, usually this kind of operations imply that you are working with a "homogeneous data". Unfortunately, built-in containers cannot provide such a guarantee without self-checking. Therefore, in my opinion that at the moment such an operator is not needed.</div><div><br></div><div>With kind regards,</div><div>-gdg</div><div> </div></div></div></div></div></div></div></div></div>