human
Here's a good function header given the following:
I wrote the below code

    def decorate(cls):
        assert issubclass(cls, Exception)
        if (not hasattr(cls, '_wampuris')):
            cls._wampuris = []
        cls._wampuris.append(Pattern(uri, Pattern.URI_TARGET_EXCEPTION))
        return cls
    return decorate

What's a good function header?
assistant
#Here's a good function header.

@public
def error(uri):