[Python-Dev] function for counting items in a sequence (original) (raw)
Raymond Hettinger python at rcn.com
Sun Apr 8 09:56:07 CEST 2007
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Instead of a separate function in collections, it may be sensible to stick with the familiar and provide a dictionary contructor for the commonly encounter use case of counting things:
@classmethod def fromcount(cls, iterable): d = cls() for elem in iterable: d[elem] = d.get(elem, 0) + 1 return d
Raymond
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