[Biopython] Skipping over blank/erroneous Entrez.esummary() results

[Peter]

On Wed, Oct 7, 2009 at 3:11 AM, Michiel de Hoon <mjldehoon at yahoo.com> wrote:
>
> We should probably modify Bio.Entrez so that empty "integer" values are treated correctly.
>

Does "correctly" mean a default value? I see Brad has just commited a change to
use -1 in this case, but perhaps None is also a good choice? Can we
alternatively
leave this bit of the data structure empty?

Peter