def get_sources_sites(self):
    sites = set()
    for sites_list in self.sources.get():
        for site in sites_list:
            sites.add(site.get('site'))
    return list(sites)
def get_sources_sites(self):
    sites = set()
    for sites_list in self.sources.get():
        for site in sites_list:
            sites.add(site.get('site'))
    return list(sites)