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

    filter_func = settings.COMMENT_FILTER
    if (not filter_func):
        def filter_func(s):
            return linebreaksbr(urlize(s, autoescape=True), autoescape=True)
    elif (not callable(filter_func)):
        filter_func = import_dotted_path(filter_func)
    return filter_func(comment_text)

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

@register.filter
def comment_filter(comment_text):