On 12.08.2016 16:58, Evangelos Petsalis wrote:
> Hi,
>
> After processing an external text file I create a an object that among other
> things holds a graph object, properties, vertices etc etc.
> I would like to save the original copy of the object, so after I can always
> refer back to it in a speedy fashion without having to re-parse the text
> file and re-initialize the object, but when I tried to use deepcopy() it
> complains.
> I can not even perform a deep copy on a Vertex object.
>
> Any idea why this is happening, and most importantly is there a work around?
> (I tried pickle and shelve and they do not work either).

It is difficult to be precise, since you have not given a concrete
example. But the only general issue I can see is that Vertex and Edge
objects are not pickable. You should instead store their integer and
pair representations, respectively:

    v = int(v)
    e = (int(e.source()), int(e.target()))

and pickle that.

Best,
Tiago

-- 
Tiago de Paula Peixoto <[email protected]>

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