On Thu, Aug 20, 2009 at 11:01 AM, Jason
Grout<jason-s...@creativetrax.com> wrote:
>
> William Stein wrote:
>> On Thu, Aug 20, 2009 at 2:18 AM, Nathann Cohen<nathann.co...@gmail.com>
>> wrote:
>>> Hello !!!
>>>
>>> Starting from a kind of troll related to the next-to-be tour for
>>> Graphs in Sage ( I wanted to color the map of western europe, but the
>>> majority of Sage's users do not live there ), I tried to build a graph
>>> of the whole world by using your dear CIA's data ( available freely on
>>> their website )
>>>
>>> Do you think it would be interesting to add it to the graph generators
>>> in Sage ?
>>
>> Yes.
>>
>>> It could be available as graphs.WorldMap() :-)
>>
>> Yes.
>>
>>> If so, I have a small problem : how to include it ? I generated it by
>>> parsing again and again several files, then building the final graph
>>> through Python, but the only way I have now to share this graph is to
>>> write it by g.write().
>>
>> Why not just include a pickle of it? Make sure there is a doctest
>> that involves creating it, so that we can't release a version of Sage
>> if this pickle breaks.
>>
>> And if you say you can't pickle it, then something is wrong with
>> pickling graphs, and we have a bigger problem to worry about!
>>
>> In case you don't know, you can use pickle as follows:
>>
>> sage: save(G, 'g.sobj')
>> sage: G = load('g.sobj')
>>
>
>
> Can we include binary data files with Sage? I thought for some reason
> this was frowned upon.
It is frowned upon, but only if they can't easily be removed, and/or
easily recreated from some text form.
I've been meaning to add a script that takes an existing Sage tarball
and makes a "clean" binary-free tarball. This would mean removing the
pickle jar and all the hg repositories.
> If we can include pickles, then I agree, pickling it would be the
> easiest option.
We already include hundreds of pickles in the pickle jar, which is
used by doctesting to verify that new versions of sage don't break old
pickles.
-- William
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