The coersion
sage: ZZ(1/2)
fails and (correctly) raises a TypeError while
sage: ZZ(QQbar(sqrt(17)))
fails and (incorrectly) raises a ValueError.
This has several knock on effects, in particular vector(ZZ, [list of
algebraic numbers]) all of whoms try / except blocks are set up to catch a
TypeError in the event that one of the elements fails to be coerced to an
integer. This in turn causes
Polyhedron([(AA(sqrt(17)),)]).integral_points() to fail as this ValueError
is never caught.
Should the _integer_ methods in qqbar.py be changed to raise TypeErrors
like the other number types in Sage?
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