#15669: Errors with graph complement
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Reporter: tscrim | Owner: tscrim
Type: defect | Status: needs_review
Priority: major | Milestone: sage-6.1
Component: graph theory | Resolution:
Keywords: | Merged in:
Authors: Travis Scrimshaw | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
public/graphs/complement-15699 | e2a498c3c7adc71adcadd76b0bc09ea9a6efe77c
Dependencies: | Stopgaps:
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Comment (by ncohen):
Yoooooooo !
> What's the "canonical" way to check if a graph `G` is immutable?
`hasattr(G, '_immutable') and G._immutable`?
Hmmmmmmm.... Well, we have been using `if hasattr(G, '_immutable',
False):` several times now, even if I don't like it. But my main reason
for not liking it is that the Poset backend have this variable set while
they are not immutable, and #15623 will fix it anyway... So perhaps we can
do that indeed. Until there is a generic way to test if something is
immutable `:-)`
> We'll just keep fixing them as we come across them I guess.
Yepyepyep `:-/`
But the graph products. The unions. The subgraphs. The orientations...
pffffff `:-/`
Nathann
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Ticket URL: <http://trac.sagemath.org/ticket/15669#comment:5>
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