human
I wrote the below code

    def fix_link_cb(m):
        url = m.group('url')
        if ('://' in url):
            result = (((m.group('before') + '"') + join(proxy_url, url)) + '"')
        else:
            result = (((m.group('before') + '"') + join(proxy_url, host_url, url)) + '"')
        return result
    data = _link_re_1.sub(fix_link_cb, data)
    data = _link_re_2.sub(fix_link_cb, data)
    return data

What's a good function header?

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

def fix_links(data, proxy_url, host_url):