Antoine Pitrou added the comment:
The request sounds ok to me. As in the corner case of negative values, it seems
that Counter currently doesn't elide zero values, e.g.:
>>> Counter({'a': 0}) == Counter({})
False
Therefore, we should have:
>>> Counter({'a': -1}) < Counter({'a': 0})
True
but:
>>> Counter({'a': -1}) < Counter({})
False
(I must admit, the current semantics of Counter look a bit ad hoc and not
terribly consistent... halfway between a regular mapping and a multiset)
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nosy: +pitrou
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<http://bugs.python.org/issue22515>
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