On Mon, Mar 30, 2009 at 5:51 AM, spir <denis.s...@free.fr> wrote:
> Hello,
>
> Is there something like a __callattr__ magic method that would catch either
> unknown (like __getattr__) or all (like __getattribute__) method calls?
> If not, how would you do that? Also if not, do you know why we have
> __getattr__, __setattr__, but no __callattr__?
Methods are just callable attributes. If you have for example
class Foo(object):
def sayFoo(self):
print 'foo'
f = Foo()
then sayFoo is an attribute of class Foo.
When you then write
f.sayFoo()
what that means is,
- look up the sayFoo attribute on object f (returning the class
attribute since f has no sayFoo attribute itself)
- call the object that results
So, to intercept calls to unknown methods you use __getattr__ or
__getattribute__ just as for other attributes. For example,
In [10]: class Foo(object):
....: def __getattr__(self, name):
....: def show():
....: print 'called', name
....: return show
In [18]: f = Foo()
In [19]: f.superduper()
called superduper
Kent
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