Speed up python code for computing matrix cofactors

Question

As part of a complex task, I need to compute matrix cofactors. I did this in a straightforward way using this nice code for computing matrix minors. Here is my code:

Answer 1

from sympy import *
A = Matrix([[1,2,0],[0,3,0],[0,7,1]])
A.adjugate().T

And the output (which is cofactor matrix) is:

Matrix([
[ 3, 0,  0],
[-2, 1, -7],
[ 0, 0,  3]])