Em Quinta 27 Abril 2006 19:42, Simon Belak escreveu:
> Hi,
>
> I'm going to make everyone's life miserable again. ;)
>
> In r1279 I added support for "alternative" decorator syntax as used by
> PEAK to lessen the anguish of people still on Python 2.3. This
> unfortunately requires a bit different application of decorator() function.
>
> Before:
>
> def foo(a):
> def entagle(func)
> def caller(func, *args, **kw):
> func(*args, **kw)
> return decorator(caller)(func)
> return entagle
>
> after:
>
> def foo(a):
> def entagle(func)
> def caller(func, *args, **kw):
> func(*args, **kw)
> return caller
> return decorator(entagle)
>
> As an added bonus it is also marginally more concise.
I had, before:
@decorator
def my_decorator(func, *args, **kwords):
...
How should I translate it to the new syntax? I'm not worried with supporting
Python 2.3 here, so the easiness of the old syntax was very nice to me.
> While I was at it, I made another change. Until now decorator() added
> *args and **kw to the resulting function signature unless optional
> argument "argsink" was false.
> Well, "argsink" is no more. Instead we have a much more powerful (still
> optional) argument "signature" similar in composition to what
> inspect.getargspec() returns, allowing us to define an arbitrary
> signatures (mind, the function being decorated still needs to be able to
> digest this new parameter specification).
> To get the beloved care-free will-eat-anything signatures back a helper
> named weak_signature_decorator() is available.
I tried it as well, but it won't work with the above (mine) syntax. I had to
convert to your syntax to have it working... But then, I started having
other problems, specially with @turbogears.validate, which is failing always.
> I invite all interested to take a look at decorator.py and
> test_decorator.py. The use of signature in anger can be observed in
> util.bind_args().
>
> Knowing myself I suggest we keep it in trunk for a while (maybe until
> after the sprint and than send it into the wild with nice and shiny
> documentation by it's side).
Here are my "attempts":
===============================================================================
def mensagem_json():
def entangle(func):
def caller(func, *args, **kwords):
print "#################"
return caller
return decorator(entangle)
===============================================================================
What results in:
===============================================================================
Traceback (most recent call last):
File "./start-siteamostras.py", line 26, in ?
from siteamostras.controllers import Root
File
"/home/godoy/empresa/clientes/latam/Site-Amostras/siteamostras/controllers/__init__.py",
line 18, in ?
from siteamostras.controllers.toxicologia import Toxicologia
File
"/home/godoy/empresa/clientes/latam/Site-Amostras/siteamostras/controllers/toxicologia.py",
line 24, in ?
from siteamostras.controllers import analises
File
"/home/godoy/empresa/clientes/latam/Site-Amostras/siteamostras/controllers/analises.py",
line 29, in ?
class Analises(controllers.Controller):
File
"/home/godoy/empresa/clientes/latam/Site-Amostras/siteamostras/controllers/analises.py",
line 213, in Analises
@turbogears.expose()
TypeError: mensagem_json() takes no arguments (1 given)
===============================================================================
When I change it to:
===============================================================================
def mensagem_json(something):
def entangle(func):
def caller(func, *args, **kwords):
print "#################"
return caller
return decorator(entangle)
===============================================================================
it runs, but @turbogears.validate fails.
Changing it to:
===============================================================================
def mensagem_json(func):
def entangle(func):
def caller(func, *args, **kwords):
print "#################"
return caller
return decorator(entangle)
===============================================================================
Using weak_signature_decorator doesn't help and yields the same results.
In my code I have:
===============================================================================
@turbogears.expose()
@turbogears.error_handler(turbogears.util.bind_args(add = True)(analises))
@turbogears.validate(form = formulario_analises)
@identity.require(identity.conditions.in_group("latam_novo"))
@mensagem_json
def save(self, **kword):
...
===============================================================================
I hope I'm doing something wrong and that is easy to solve.
--
Jorge Godoy <[EMAIL PROTECTED]>
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