def populate_from_wikidata(self, wikidata_id):
client = Client()
+ client.opener.addheaders = [(
+ 'User-Agent', 'Wolne Lektury / https://wolnelektury.pl / Python-wikidata'
+ )]
entity = client.get(wikidata_id)
self.label = entity.label.get('pl', entity.label) or ''