def d(f): ... def nf(*a, **kw): ... print "decorated function called" ... return f(*a, **kwargs) ... functools.update_wrapper(nf, f) ... return nf ... class A(object): ... @d ... @staticmethod ... def a(self): ... print "a" ... Traceback (most recent call last): File "<stdin>", line 1, in <module> File "<stdin>", line 3, in A File "<stdin>", line 5, in d File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
I'd like to make a claim about the following example, that update_wrapper should be improved to preserve the behavior of known, built-in decorators. In this case, I'm talking about staticmethod. The order I list here feels natural, but it obviously doesn't work. The only reason it doesn't seems to be that it is trying to decorate the descriptor, not the function itself. This is expected, but it could certainly be smart enough to detect a descriptor and attempt to get the actual callable underneath, could it not? It would not work for all cases, of course. python2.5/functools.py", line 33, in update_wrapper setattr(wrapper, attr, getattr(wrapped, attr)) AttributeError: 'staticmethod' object has no attribute '__module__'