DLX is a serialization, storage, and query toolkit for MARC data and associated content files. DLX provies APIs for manipulating, storing, and retrieving MARC data as well as content file submission and retrieval (not yet implemented).
> pip install git+git://github.com/dag-hammarskjold-library/dlxDLX provides various classes for working with the DLX data.
from bson import Regex
from dlx import DB
from dlx.marc import BibSet, QueryDocument, Condition
DB.connect(<connection_string>)
query = QueryDocument(
Condition(
tag='191',
modifier='exists'
),
Condition(
tag='269',
subfields={'a': Regex('^1975')}
)
)
print(query.to_json())
bibset = BibSet.from_query(query, projection={'191': True}, skip=0, limit=0)
print('There are {} results'.format(bibset.count))
bibset.cache()
for bib in bibset.records:
print('id: {}, symbol: {}'.format(bib.id, bib.get_value('191','a')))
print(bibset.to_xml())