8000 bpo-45851: Avoid full sort in statistics.multimode() by rhettinger · Pull Request #29662 · python/cpython · GitHub
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bpo-45851: Avoid full sort in statistics.multimode() #29662

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Merged
merged 20 commits into from
Nov 20, 2021
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bpo-45851: Avoid full sort in statistics.multimode() #29662

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bpo-45851: Avoid full sort in statistics.multimode()
rhettinger Nov 20, 2021
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8 changes: 5 additions & 3 deletions Lib/statistics.py
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Original file line number Diff line number Diff line change
Expand Up @@ -609,9 +609,11 @@ def multimode(data):
>>> multimode('')
[]
"""
counts = Counter(iter(data)).most_common()
maxcount, mode_items = next(groupby(counts, key=itemgetter(1)), (0, []))
return list(map(itemgetter(0), mode_items))
counts = Counter(iter(data))
if not counts:
return []
maxcount = max(counts.values())
return [value for value, count in counts.items() if count == maxcount]


# Notes on methods for computing quantiles
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