#15956: WeakValueDictionary does not handle unhashable keys correctly
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Reporter: saraedum | Owner:
Type: defect | Status: new
Priority: minor | Milestone: sage-6.2
Component: misc | Keywords: hash
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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The `WeakValueDictionary` behaves differently from regular dicts for
unhashable keys:
{{{
sage: {}[[]]
TypeError: unhashable type: 'list'
sage: sage.misc.weak_dict.WeakValueDictionary()[[]]
KeyError: []
}}}
This is because http://docs.python.org/2/c-api/dict.html#PyDict_GetItem
does not throw a `TypeError`.
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Ticket URL: <http://trac.sagemath.org/ticket/15956>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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