On 27/05/15 22:02, Volker Braun wrote:
IMHO the bug here is a lack of validation. Its perfectly fine to have
mutable elements of a vector subspace, but y.__setitem__ should then check
that the vector really is in the subspace or raise a ValueError. Of course
it would almost always raise, so its not a particularly useful operation.
One alternative is to have something along the clonable arrays
with v.clone() as u:
u[1] = 3
u[2] = 6
# check here automatically as going out
v + v
Vincent
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