decorator for a function without argument

[rkmr.em at gmail.com]

hi:
i have a decorator given below.
def checkdb(web):
        def decorator(func):
                def proxyfunc(self, args=(), kw=None):
                                #DO STUFF with web
                                return func(self, *args, **kw)
                return proxyfunc
        return decorator


but if i use it to decorate function without any arguments I get this error:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: proxyfunc() takes at least 1 argument (0 given)

how to fix this?
thanks
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