#15278: Hash and equality for graphs
--------------------------------+-------------------------
Reporter: SimonKing | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-5.13
Component: graph theory | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: #12601 | Stopgaps:
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Comment (by SimonKing):
Moreover, copying a graph currently erases the `_immutable` flag:
{{{
sage: gi._immutable = True
sage: hash(gi)
1186925161
sage: copy(gi) is gi
False
sage: copy(gi)._immutable
---------------------------------------------------------------------------
AttributeError Traceback (most recent call
last)
<ipython-input-8-7ee33a4c939a> in <module>()
----> 1 copy(gi)._immutable
AttributeError: 'Graph' object has no attribute '_immutable'
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/15278#comment:5>
Sage <http://www.sagemath.org>
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