def Matrix_Line(A,i):
v=Vector()
v.__Alloc__(len(A))
for j in range( len(v) ):
v[j]=A[i][j]
return v
def Matrix_Column(A,i):
v=Vector()
v.__Alloc__(len(A[i]))
for j in range( len(v) ):
v[j]=A[j][i]
return v
