ValueError: The truth value of a DataFrame is ambiguous. about recordlinkage

[J535D165]

Hello dserban,

Thanks for your feedback and sorry for this bug. I found the solution and will push an update tomorrow.

[J535D165]

The bug is solved in version 0.4.0 (install with pip install recordlinkage)

Two things about your example:

• When you are using Python 2.x, the strings need to be unicode.
• compare.fuzzy is now compare.string. (both work btw)

from pandas import DataFrame as DF
import jellyfish
import recordlinkage

names = \
    [ {'name': u'Daniel'}
    , {'name': u'Danieel'}
    , {'name': u'Daaniel'}
    , {'name': u'Daniiel'}
    , {'name': u'Alex'}
    , {'name': u'George'}
    , {'name': u'Laura'}
    , {'name': u'Mary'}
    ]
names_df = DF(names)
names_df.index.name = 'aaa'
ps = recordlinkage.Pairs(names_df)
pairs = ps.full()
compare_cl = recordlinkage.Compare(pairs, names_df, names_df)
print compare_cl.string('name', 'name', method='jarowinkler', threshold=0.85)

[Shonexu]

Hi All,

i encountered the same problem using Python 3.7 and recordlinkage 0.14 . Your advice would be highly appreciated

below is the detail of the error message

ValueError Traceback (most recent call last)
in
----> 1 compare = rl.Compare(candidate_links, bib, grid)

~\AppData\Local\Continuum\anaconda3\lib\site-packages\recordlinkage\base.py in init(self, features, n_jobs, indexing_type, **kwargs)
540
541 # public
--> 542 if n_jobs == -1:
543 self.n_jobs = cpu_count()
544 else:

~\AppData\Local\Continuum\anaconda3\lib\site-packages\pandas\core\generic.py in nonzero(self)
1476 raise ValueError("The truth value of a {0} is ambiguous. "
1477 "Use a.empty, a.bool(), a.item(), a.any() or a.all()."
-> 1478 .format(self.class.name))
1479
1480 bool = nonzero

ValueError: The truth value of a DataFrame is ambiguous. Use a.empty, a.bool(), a.item(), a.any() or a.all().