On 4/4/07, Bill Baxter <[EMAIL PROTECTED]> wrote: > On 4/5/07, Robert Kern <[EMAIL PROTECTED]> wrote: > > Bill Baxter wrote: > > > Ok, I got another hopefully easy question: > > > > > > Why this: > > > class Point(object): > > > ... > > > > > > Instead of the style that's used in the Python tutorial in the > > > 'classes' chapter: > > > class Point: > > > ... > > > > Because the former make new-style classes and the latter make old-style > > classes. > > It's not an issue of personal preference: they are somewhat different object > > models and there are things that old-style classes can't do. As HasTraits is > > also a new-style class, there's no point in using old-style classes in this > > tutorial. > > What's the difference in the object models? I'm surprised that the > Python tutorial seems to be completely silent on this issue. > (http://docs.python.org/tut/node11.html) > Not really answering your question -- but I have complained about that tutorial before, with regards to new language features ... it does not mention from __future__ import division In my mind this should be put at the very front - because it's going to be a very big thing once Python 3000 comes around. The Python-list people did not like my arguing because apparently the tutorial is supposed to "look nice" .... [[ don't get me wrong, I really recommend the tutorial, I like it, I think it's good ]] But some (even if) ugly things should be said up front, if they clear up the way. Python 3000 will also default to new-style classes -- so that "(object)" thing would go away again if I'm not mistaken.
-Sebastian PS: Maybe this list could officially endorse the from __future__ import division I would be very interested in this ! Math becomes clearer, and things like arr[5/2] won't only suddenly fail in the future, they should be NOW written as arr[5//2] (if you need integer division) Thanks. [[ please start a new thread, and put up a page on the wiki ;-) ]] _______________________________________________ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion
