[Tutor] Intercepting methods calls

[Andreas Kostyrka]

Simple (untested in the mailer typed):

class A:
    def __getattr__(self, key):
         if key.startswith("user"):
              def func():
                    return key[4:]
              return func
         raise AttributeError

assert A().userabc() == "abc"

Something like that?


On Wednesday 04 June 2008 19:12:16 you wrote:
> Sorry, i doesn't explain my question how i should.
>
> What I'm trying to accomplish is to add methods dynamically at class
> instances. but i what to create them whe a A().someMethod() is called (
> someMethod doesn't exist )
>
> Like as with attributes.
>
> So far i try with ( at instance and at class level ):
>
> def foo():
>     return lambda: 'foo'
>
> class A(object):  pass
>
> a = A()
> a.foo = foo()
>
> ---------------------------
>
> def foo():
>     return lambda self: 'foo'
>
> class A(object):  pass
>
> A.foo = foo()
> a= A()
>
> This works, but i really like to be able of bound those functions using a
> sintax like:
>
> a = A()
> a.someMethod()    # This should bound the somethod to a function.
>
>
> Thaks in advance


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