Comment #4 on issue 2544 by Vinzent.Steinberg: Matrix(...)[i] for non-vector matrices should not be supported.
http://code.google.com/p/sympy/issues/detail?id=2544

What I don't like about numpy:

v = matrix([1,2,3])
v
matrix([[1, 2, 3]])
v[0]
matrix([[1, 2, 3]])
v.transpose()[0]
matrix([[1]])

This behavior makes sense for arrays, but not for matrices IMHO.

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