Alex G <[EMAIL PROTECTED]> wrote:
> class classA(object):
> @decorator('argument')
> def some_method(self):
> print "An exception should be raised when I'm called, but not
> when I'm defined"
>
> Will result in an exception on definition.
Well, yes it would. That's because what you defined a decorator. i.e. a
function which wraps the method in another function. A decorator is called
with a single argument: the function/method to be wrapped.
What you have done in the code above is to call something named 'decorator'
which isn't a decorator at all, it's a function that you expect to return a
decorator (a decorator factory if you wish). If you make it return a
decorator then it will all work fine:
>>> def decoratorfactory(s):
def decorator(arg):
def raise_exception(fn):
raise Exception
return raise_exception
return decorator
>>> class some_class(object):
@decoratorfactory('somestring')
def some_method(self):
print "An exception should be raised when I'm called, but not when
I'm defined"
>>> some_class().some_method()
Traceback (most recent call last):
File "<pyshell#24>", line 1, in <module>
some_class().some_method()
File "<pyshell#21>", line 4, in raise_exception
raise Exception
Exception
>>>
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