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Option to select shortest item in the duplicate list for process.dedupe #76

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Option to select shortest item in the duplicate list for process.dedupe #76

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dedupe_selector - add option for selecting shortest duplicated value …
smtodd Sep 1, 2024
071c8b3
Merge pull request #1 from smtodd/dedupe_selector
smtodd Sep 1, 2024
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22 changes: 20 additions & 2 deletions thefuzz/process.py
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Original file line number Diff line number Diff line change
Expand Up @@ -406,6 +406,7 @@ def dedupe(
contains_dupes: _TC,
threshold: float = 70,
scorer: _Scorer = fuzz.token_set_ratio,
len_selector: str = "longest"
) -> t.Union[t.List[str], _TC]:
"""
This convenience function takes a list of strings containing duplicates and uses fuzzy matching to identify
Expand All @@ -427,17 +428,34 @@ def dedupe(
of the form f(query, choice) -> int.
By default, fuzz.token_set_ratio() is used and expects both query and
choice to be strings.
len_selector: Choose whether to return the longest or shortest item in the duplicate list.
We assume 'longest' contains the most detailed entity information about the group.
We assume 'shortest' returns the most generalized information about the entity group.

Returns:
A deduplicated list. For example:
A deduplicated list that returns the longest item. For example:

In: contains_dupes = ['Frodo Baggin', 'Frodo Baggins', 'F. Baggins', 'Samwise G.', 'Gandalf', 'Bilbo Baggins']
In: dedupe(contains_dupes)
Out: ['Frodo Baggins', 'Samwise G.', 'Bilbo Baggins', 'Gandalf']

A deduplicated list that returns the shortest item.
In: dup_universities = ["Duke University",
"Duke University Department of Chemistry",
"Duke University Hospital",
"Stanford",
"Stanford University Business School",
'Stanford University Engineering Department',
'Stanford University Biology Department']
In: dedupe(dup_universities, threshold=70, len_selector='shortest']
Out: ['Stanford', 'Duke University']
"""
deduped = set()
for item in contains_dupes:
matches = extractBests(item, contains_dupes, scorer=scorer, score_cutoff=threshold, limit=None)
deduped.add(max(matches, key=lambda x: (len(x[0]), x[0]))[0])
if len_selector == "longest":
deduped.add(max(matches, key=lambda x: (len(x[0]), x[0]))[0])
elif len_selector == "shortest":
deduped.add(min(matches, key=lambda x: (len(x[0]), x[0]))[0])

return list(deduped) if len(deduped) != len(contains_dupes) else contains_dupes