Brett Cannon added the comment:
After 6 years and no really movement I don't think we are going to bother to
change the semantics for this. :)
--
resolution: -> wont fix
stage: test needed -> resolved
status: open -> closed
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Python tracker
Changes by Arfrever Frehtes Taifersar Arahesis arfrever@gmail.com:
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nosy: +Arfrever
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Python tracker rep...@bugs.python.org
http://bugs.python.org/issue18275
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Antoine Pitrou added the comment:
Does anyone actually check for instance-ness of super objects? I would never
have thought of such an idiom.
--
nosy: +benjamin.peterson, pitrou
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Python tracker rep...@bugs.python.org
Brett Cannon added the comment:
So I have a use case for this actually. =)
http://bugs.python.org/issue17621 is about trying to finally add a lazy mixin
to importlib so people stop asking for it. I have a version already written
externally at
Antoine Pitrou added the comment:
http://bugs.python.org/issue17621 is about trying to finally add a
lazy mixin to importlib so people stop asking for it. I have a
version already written externally at
https://code.google.com/p/importers/source/browse/importers/lazy.py.
Part of the trick of
Brett Cannon added the comment:
On Fri, Jun 21, 2013 at 10:02 AM, Antoine Pitrou rep...@bugs.python.orgwrote:
Antoine Pitrou added the comment:
http://bugs.python.org/issue17621 is about trying to finally add a
lazy mixin to importlib so people stop asking for it. I have a
version
Antoine Pitrou added the comment:
I'm attracted to the idea of making a loader lazy by simply doing
something
like ``class LazySourceFileLoader(LazyMixin, SourceFileLoader):
...``.
But then you have to make a specific Lazy subclass for each delegated
loader implementation. With a proxy
Brett Cannon added the comment:
On Fri, Jun 21, 2013 at 11:11 AM, Antoine Pitrou rep...@bugs.python.orgwrote:
Antoine Pitrou added the comment:
I'm attracted to the idea of making a loader lazy by simply doing
something
like ``class LazySourceFileLoader(LazyMixin, SourceFileLoader):
Raymond Hettinger added the comment:
I'm not sure this is a theoretically sound idea. Do you know what CLOS does in
the same circumstance?
--
nosy: +rhettinger
___
Python tracker rep...@bugs.python.org
http://bugs.python.org/issue18275
Brett Cannon added the comment:
I have no idea what CLOS does in this situation.
I'm fine with this never being changed, but I wanted to at least file the bug
to have the discussion in case it ever comes up again.
--
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Python tracker
Raymond Hettinger added the comment:
I have no idea what CLOS does in this situation.
No worries, I was just curious whether you knew whether this was a solved
problem in Dylan or CLOS or some other language.
When faced with a diamond diagram, what are the semantics for
Brett Cannon added the comment:
That solution looks right. Problem is that it would need to either go directly
into isinstance() or type would need to grow an __instancecheck__ to deal with
this case since you can't override isinstance from the instance end. That I'm
not sure people are okay
New submission from Brett Cannon:
class A: pass
class B(A): pass
sup = super(B, B())
isinstance(sup, A) # returns False
Why is that? Is there an explicit reason to prevent that isinstance check from
working? How about just for ABCs? Either way it's annoying that at least for
ABCs you can't
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