openmedialibrary/oml/meta/duckduckgo.py

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# -*- coding: utf-8 -*-
# vi:si:et:sw=4:sts=4:ts=4
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import ox.web.duckduckgo
import stdnum.isbn
from .utils import find_isbns
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import logging
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logger = logging.getLogger(__name__)
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def find(query):
logger.debug('find %s', query)
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query += ' isbn'
isbns = []
for r in ox.web.duckduckgo.find(query):
isbns += find_isbns(' '.join(r))
results = []
done = set()
for isbn in isbns:
if isbn not in done:
isbn = stdnum.isbn.to_isbn13(isbn)
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results.append(isbn)
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done.add(isbn)
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if len(isbn) == 13 and isbn.startswith('978'):
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done.add(stdnum.isbn.to_isbn10(isbn))
return results