In [3]: records = sruthi.searchretrieve('https://suche.staatsarchiv.djiktzh.ch/SRU/', query='Zurich')
In [4]: pprint.pprint(records)
SearchRetrieveResponse(sru_version='1.2',count=500,next_start_record=11)
In [5]: records = sruthi.searchretrieve('http://catalogue.bnf.fr/api/SRU', query='bib.isbn="9782412049402"', operation="sea
...: rchRetrieve")
In [6]: pprint.pprint(records)
SearchRetrieveResponse(sru_version='1.2',count=1,next_start_record=None)
Fixing #26
Here is a trace: