class kewlness(object):
    def __init__(self, func):
        self.func = func
    def __call__(self, *args, **kwargs):
        if len(args) > 0:
            self.new_thing = args[0]
        return self.func(*args, **kwargs)
    def __repr__(self):
        return self.func.__doc__
 
 
@kewlness
def testmeyo(*args):
    pass
    # so how do i get "new_thing" attribute to print?
 
 
if __name__=='__main__':
    testmeyo("should_be_value_of_new_thing")
    print testmeyo.new_thing