#18929: Include igraph library
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Reporter: borassi | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.8
Component: packages: | Resolution:
optional | Merged in:
Keywords: igraph library | Reviewers:
Authors: Michele Borassi | Work issues:
Report Upstream: N/A | Commit:
Branch: | ac2c5c39a65c1ef8e003219bf59fc9f6e35f61e1
u/borassi/include_igraph_library | Stopgaps:
Dependencies: |
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Comment (by ncohen):
Hello again Michele,
Don't worry about the many steps it takes to get this through. I also
worry that I may be a bit boring, with all these things I add one by one
to your stack because I cannot seem to figure out them all at the same
time.
I installed the two packages, and things went well. I still have a
question about the igraph package: upstream is apparently a 'fake' .tar.gz
archive (it is not gzipped) -> is this why your igraph package is 'not
exactly' (up to md5sum hash) equal to upstream?
While looking at the (Di)Graph constructor, I thought that something
unlikely may happen:
1) Somebody has a igraph object in a Sage session
2) igraph is not installed in Sage
I thought that it could happen if by some chance such an object was
obtained through pickling.
Perhaps it sounds stupid. This being said, I also 'fixed' something else:
importing modules is not totally free, and it was even the bottleneck in
some design code I met in the past. For this reason, it is better to not
import things in potentially critical parts of the code (the graph
constructor can be one of those, for instance when you enumerate graphs up
to isomorphism) and so I tried to make it less frequent. This commit is
located at `public/18929`, you can take/remove what you like/do not like
in it.
Have you figured out this GPL2 vs GPLv2+ issue I mentionned in an email?
Byeeeeeeeeeee,
Nathann
P.S.: I had some issue when installing the package, which I reported
upstream (https://github.com/igraph/igraph/issues/842)
--
Ticket URL: <http://trac.sagemath.org/ticket/18929#comment:12>
Sage <http://www.sagemath.org>
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