I do not like it since a matrix can also be thought as a list of
vectors. Which is actually what you get when doing
{{{
sage: m = matrix(3, range(9))
sage: list(m)
[(0, 1, 2), (3, 4, 5), (6, 7, 8)]
}}}
Most of the time, `a in b` should be equivalent to
any(x == b for x in a)
And for matrix `a in m` would be an answer to "is a a row of m?".
Vincent
On 15/04/15 19:26, Jori Mantysalo wrote:
Would it break something if matrix class would have __contains__() so
that one could say for example "42 in M" instead of "42 in M.list()"?
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