(
Book,
[
- ('gazeta_link', lambda b: b.gazeta_link),
('wiki_link', lambda b: b.wiki_link),
('źródło', lambda b: b.extra_info.get('source_url')),
],
(
Picture,
[
- ('gazeta_link', lambda p: p.culturepl_link),
('wiki_link', lambda p: p.wiki_link),
('źródło', lambda p: p.extra_info.get('source_url')),
],