vectorization of a matrix

edit

In Python NumPy arrays implement the 'flatten' method (although this stacks the rows of the matrix, not the columns)

sage: A
array([[1, 2, 3],
       [4, 5, 6],
       [7, 8, 9]])
sage: A.flatten()
array([1, 2, 3, 4, 5, 6, 7, 8, 9])
sage: A.T.flatten()
array([1, 4, 7, 2, 5, 8, 3, 6, 9])

In OCTAVE

octave: A
A =

   8   1   6
   3   5   7
   4   9   2

octave: A(:)'
ans =

   8   3   4   1   5   9   6   7   2

Is there a direct method “.vectorize()” of a matrix in SAGE?

Thanks in advance!