human
I wrote the below code

    def transform_function(key):
        id_or_name = _key_id_or_name_n(key, index)
        if (not id_or_name):
            return u''
        return unicode(id_or_name)
    return transform_function

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

def key_id_or_name_as_string_n(index):