With 10.8.beta6
<https://github.com/sagemath/sage/commit/4e2319bc162a9f48b209cea89efe49e8c7e744e7>,
several methods computing the number of things that do not follow the
naming scheme `n_xxx` or `number_of_xxx` became aliases. For example, we
now have `Graph(3).n_vertices()`, and the method name `num_verts` is an
alias for `n_vertices`.
IMPORTANT INTERLUDE: `num_verts` is not deprecated.
This move has some advantages, but also one disadvantage: it clutters
tab-completion.
I experimented a little, and found a way to hide aliases from
tab-completion, as follows:
class AlternatingSignMatrix(...):
...
def __init__(self, parent, asm):
...
self._matrix = asm
self.__setattr__('number_negative_ones',
self.number_of_negative_ones)
Element.__init__(self, parent)
def __dir__(self):
return [f for f in super().__dir__() if f != "number_negative_ones"]
Is there any downside to this idea? Of course, I would turn it into
something easier to use, like a decorator.
Martin
PS: I found one "ordinary" class messing with `__dir__`, namely
`Polyhedron_ZZ`, but I don't see any reason why the above approach would be
problematic.
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