trac #16701: IncidenceStructure.degree
trac #16701: A fix for a blasphemy
trac #16701: Tribute to pep8 fascism
trac #16702: Raise exceptions when database_gap is not installed
Trac #16701: IncidenceStructure.degree

That's all !

Nathann

URL: http://trac.sagemath.org/16701
Reported by: ncohen
Ticket author(s): Nathann Cohen
Reviewer(s): Dima Pasechnik
Trac #16702: Raise exceptions when database_gap is not installed

Before

{{{
sage: graphs.ChvatalGraph().automorphism_group().structure_description()
...
Error, the Small Groups identification is required but not installed

   executing StructureDescription($sage1);
}}}

After

{{{
sage: graphs.ChvatalGraph().automorphism_group().structure_description()
...
RuntimeError: You must install the optional database_gap package first.
}}}

URL: http://trac.sagemath.org/16702
Reported by: ncohen
Ticket author(s): Nathann Cohen
Reviewer(s): Dima Pasechnik