How to use the pyreferrer.referrer.Referrer.is_valid_url function in pyreferrer

url = urlparse(raw_url)
        domain_info = tldextract.extract(raw_url)
        user_agent_info = Referrer.extract_user_agent_info(user_agent)

        referrer = {
            'type': Referrer.Types.INDIRECT,
            'url': raw_url or user_agent_info['url'],
            'subdomain': domain_info.subdomain,
            'domain': domain_info.domain or user_agent_info['domain'],
            'label': domain_info.domain.title(),
            'tld': domain_info.suffix or user_agent_info['tld'],
            'path': url.path,
            'query': ''
        }

        if Referrer.is_valid_url(url, domain_info):
            # First check for an exact match of the url. Then check for a match with different combinations of domain, subdomain and tld
            known_url = rules.get(url.netloc + url.path)\
                                    or rules.get(domain_info.registered_domain + url.path)\
                                    or rules.get(url.netloc)\
                                    or rules.get(domain_info.registered_domain)
            
            if known_url:
                referrer['label'] = known_url['label']
                referrer['type'] = known_url['type']
                referrer['query'] = Referrer.parse_query_string(url, known_url.get('parameters'))
        elif user_agent_info['registered_domain']:
            known_url = rules.get(user_agent_info['registered_domain'])

            if known_url:
                referrer['label'] = known_url['label']
                referrer['type'] = known_url['type']

url = urlparse(raw_url)
        domain_info = tldextract.extract(raw_url)
        user_agent_info = Referrer.extract_user_agent_info(user_agent)

        referrer = {
            'type': Referrer.Types.INDIRECT,
            'url': raw_url or user_agent_info['url'],
            'subdomain': domain_info.subdomain,
            'domain': domain_info.domain or user_agent_info['domain'],
            'label': domain_info.domain.title(),
            'tld': domain_info.suffix or user_agent_info['tld'],
            'path': url.path,
            'query': ''
        }

        if Referrer.is_valid_url(url, domain_info):
            # First check for an exact match of the url. Then check for a match with different combinations of domain, subdomain and tld
            known_url = rules.get(url.netloc + url.path) \
                or rules.get(domain_info.registered_domain + url.path) \
                or rules.get(url.netloc) \
                or rules.get(domain_info.registered_domain)

            if known_url:
                referrer['label'] = known_url['label']
                referrer['type'] = known_url['type']
                referrer['query'] = Referrer.parse_query_string(url, known_url.get('parameters'))
        elif user_agent_info['registered_domain']:
            known_url = rules.get(user_agent_info['registered_domain'])

            if known_url:
                referrer['label'] = known_url['label']
                referrer['type'] = known_url['type']