On Saturday, March 17, 2012 5:25:06 PM UTC+8, Peter Otten wrote:
> Cosmia Luna wrote:
>
> > I'm porting my existing work to Python 3.X, but...
> >
> > class Foo:
> > def bar(self):
> > pass
> >
> > mthd = Foo.bar
> >
> > assert mthd.im_class is Foo # this does not work in py3k
> >
> > So, how can I get a reference to Foo? This is important when writing
> > decorators, the only way I can think out is:
> >
> > class Foo:
> > def bar(self):
> > 'Foo' # manually declare the owner class
> > pass
> >
> > mthd = Foo.bar
> >
> > assert mthd.__globals__[mthd.__doc__] is Foo # this works
> >
> > class Child(Foo):
> > def bar(self):
> > 'Child' # I have to override all method defined by bar but do
> > nothing pass
> >
> > child_mthd = Child.bar
> >
> > assert child_mthd.__globals__[child_mthd.__doc__] is Child # this works
> >
> > But the code above is quite ugly and abuses the __doc__. Is there any
> > equivalent in py3k of im_class?
>
> class set_class:
> def __init__(self, method):
> self.method = method
> def __get__(self, instance, class_):
> if instance is None:
> method = self.method
> def f(*args, **kw):
> return method(*args, **kw)
> f.im_class = class_
> f.__name__ = method.__name__
> return f
> return self.method.__get__(instance, class_)
>
> class Foo:
> def __init__(self, name):
> self.name = name
> @set_class
> def bar(self):
> print("%s says hello from bar()" % self)
> def __str__(self):
> return self.name
>
> class Bar(Foo):
> pass
>
> assert Foo.bar.im_class is Foo
> assert Bar.bar.im_class is Bar
>
> Foo("Fred").bar()
> Foo.bar(Foo("Fred"))
>
> Bar("Fred").bar()
> Bar.bar(Bar("Fred"))
>
> The cleaner approach is probably:
>
> Rule('/<action>/', endpoint=(RootController, RootController.otheraction))
> ...
> Controller, method = endpoint
> controller = Controller(Request(environ))
> ...
> method(controller)
That's exactly what I want, and I think you're right, the approach below is
cleaner.
Rule('/<action>/', endpoint=(RootController, RootController.otheraction)).
Thanks a lot.
Cosmia
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