The isolate is a qualifier of the source feature that you can access like so:
from Bio import SeqIO
from pprint import pprint
# Read genbank file
for rec in SeqIO.parse("genome.gb", "genbank"):
source = rec.features[0]
pprint(source.qualifiers)
will print:
OrderedDict([('organism', ['Amauroderma calcitum']),
('mol_type', ['genomic DNA']),
('isolate', ['FLOR 50931']),
('db_xref', ['taxon:1774182']),
('country', ['Brazil']),
('collection_date', ['07-Jan-2013']),
('collected_by', ['D.H. Costa-Rezende'])])
alternatively, IMHO, the simplest way to get this info is with bio
bio fetch KU315207 | bio json > data.json
now you have a json file that can be immediately materialized in your program, no GenBank parsing needed anymore
Read more here: Source link