Robert Kern wrote: > Bill Baxter 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) > > http://www.python.org/doc/newstyle.html >
Key point: properties work with new-style classes but fail silently and mysteriously with classic classes. Eric _______________________________________________ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion
