parse correctly patent title and authors

Former-commit-id: c23a451c8931242a714ff3fd18081e0ccb110b9b

ippisite/ippidb/ws.py

@@ -34,9 +34,9 @@ def get_epo_info(patent_number):
     if isinstance(exchange_doc, list):
         exchange_doc = exchange_doc[0]
     title = [el['$']
-             for el in exchange_doc['bibliographic-data']['invention-title'] if el['@lang'] == 'en']
+             for el in exchange_doc['bibliographic-data']['invention-title'] if el['@lang'] == 'en'][0]
     authors = [i['inventor-name']['name']['$']
-               for i in exchange_doc['bibliographic-data']['parties']['inventors']['inventor'] if i['@data-format'] == 'original']
+               for i in exchange_doc['bibliographic-data']['parties']['inventors']['inventor'] if i['@data-format'] == 'original'][0]
     biblio_year = [el['date']['$'][:4]
                    for el in exchange_doc['bibliographic-data']['publication-reference']['document-id'] if el['@document-id-type'] == 'epodoc'][0]
     return {'title': title,