def read_isbn(fields):
if '020' not in fields:
return {}
found = []
for line in fields['020']:
if '\x1f' in line:
for k, v in get_subfields(line, ['a', 'z']):
m = re_isbn_and_price.match(v)
if m:
found.append(m.group(1))
else:
m = re_isbn.match(v)
if m:
found.append(m.group(1))
else:
m = re_isbn.match(line[3:-1])
if m:
found.append(m.group(1))
ret = {}
seen = set()
for i in tidy_isbn(found):
if i in seen: # avoid dups
continue
seen.add(i)
if len(i) == 13:
ret.setdefault('isbn_13', []).append(i)
elif len(i) <= 16:
ret.setdefault('isbn_10', []).append(i)
return ret
def read_isbn(line):
found = []
if line.find('\x1f') != -1:
for k, v in get_raw_subfields(line, ['a', 'z']):
m = re_isbn.match(v)
if m:
found.append(m.group(1))
else:
m = re_isbn.match(line[3:-1])
if m:
found = [m.group(1)]
return map(str, tidy_isbn(found))