On 2014-10-21 01:39, Terry Reedy wrote:
On 10/20/2014 7:29 PM, MRAB wrote:
On 2014-10-21 00:09, Eli Bendersky wrote:
On Mon, Oct 20, 2014 at 1:01 PM, Terry Reedy mailto:tjre...@udel.edu>> wrote:
If I go to https://docs.python.org/3/using/index.html and click on
any of the TOC entries
On Oct 21, 2014, at 11:22 AM, Guido van Rossum wrote:
>Hm. I've never been a fan of that. EIBTI and such...
Yeah, I just hate seeing `class Foo(object)` in Python 3 and am too lazy to
clean up every class definition. ;) YMMV!
Cheers,
-Barry
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Hm. I've never been a fan of that. EIBTI and such...
On Tue, Oct 21, 2014 at 10:53 AM, Barry Warsaw wrote:
> On Oct 21, 2014, at 10:13 AM, Guido van Rossum wrote:
>
> >For new code, and whenever you have an opportunity to refactor old code,
> >you should use new-style classes, by inheriting your
On Oct 21, 2014, at 10:13 AM, Guido van Rossum wrote:
>For new code, and whenever you have an opportunity to refactor old code,
>you should use new-style classes, by inheriting your class from object (or
>from another class that inherits from object).
One nice way to do this module-globally is to
Hi,
The problem is a side effect of the fact that old-style classes are
implemented on top of new-style meta-classes.
Consequently although C is the "class" of C() it is not its "type".
>>> type(C())
>>> type(C()).__mro__
(, )
therefore
>>> issubclass(type(C()), object)
True
which implies
>
This is one of the unfortunate effects of the existence of "old-style"
classes in Python 2. The old-style class hierarchy is distinct from the
new-style class hierarchy, but instances of old-style classes are still
objects (since in Python, *everything* is an object).
For new code, and whenever yo
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Hi. Today, I ran across this, in Python 2.7.6:
>>> class C:
... pass
...
>>> issubclass(C,object)
False
>>> isinstance(C(),object)
True <-- ???
The description of isinstance() in Python 2.7 does not reveal this result
(to my reading).
>From a duck-typing perspective, one would also not gues
