human
I wrote the below code

    def prep(r):
        field = r.table.parent
        field.requires = IS_EMPTY_OR(IS_ONE_OF(db, ('%s.id' % r.tablename), field.represent))
        return True
    s3.prep = prep
    return s3_rest_controller()

What's a good function header?

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

def vulnerability_type():