Python Class Decorator

class_decorator.py

class test(object):
    """A property whose value is computed only once. """
    def __init__(self, function):
        self._function = function

    def __get__(self, obj, _=None):
        if obj is None:
            return self

        value = self._function(obj)
        setattr(obj, self._function.func_name, value)
        return value

    def __call__(self):
        print self._function
        print "this is test class"

@test
def hoge():pass