[sage-support] Mpmath and matrix from "normal" matrix

[Jori Mantysalo]

M1=Matrix([[1,2],[3,4]])

import scipy
M2=scipy.matrix(M1)
import mpmath as mp
M3=mp.matrix(M1)

-->

TypeError: could not interpret given arguments

Is there some reason why mpmath matrix constructor can not use "normal" 
matrix of Sage as input just like scipy does?

--
Jori Mäntysalo