#19927: unsigned infinity not hashable
--------------------------------+----------------------------
Reporter: rws | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-7.1
Component: basic arithmetic | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
--------------------------------+----------------------------
{{{
sage: hash(-oo)
-9223372036854775808
sage: hash(oo)
9223372036854775807
sage: hash(unsigned_infinity)
---------------------------------------------------------------------------
TypeError Traceback (most recent call
last)
<ipython-input-21-d3ea465a9e73> in <module>()
----> 1 hash(unsigned_infinity)
/home/ralf/sage/src/sage/structure/sage_object.pyx in
sage.structure.sage_object.SageObject.__hash__
(build/cythonized/sage/structure/sage_object.c:2739)()
344 TypeError: <type
'sage.structure.sage_object.SageObject'> is not hashable
345 """
--> 346 raise TypeError("{} is not hashable".format(type(self)))
347
348 def _cache_key(self):
TypeError: <class 'sage.rings.infinity.UnsignedInfinity'> is not hashable
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/19927>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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