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merge with 3.3
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924c822f73
@ -312,7 +312,7 @@ Common patterns for working with :class:`Counter` objects::
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dict(c) # convert to a regular dictionary
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c.items() # convert to a list of (elem, cnt) pairs
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Counter(dict(list_of_pairs)) # convert from a list of (elem, cnt) pairs
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c.most_common()[:-n:-1] # n least common elements
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c.most_common()[:-n-1:-1] # n least common elements
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+c # remove zero and negative counts
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Several mathematical operations are provided for combining :class:`Counter`
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