code: def solve_inverse(self, r):
      rhs = np.zeros(self.n, dtype=self.dtype)
      rhs[r] = 1
      return self.lusolve(rhs[1:])
  
imports: import networkx
label_desc: Use image node_id 2 for calling the SuperLUInverseLaplacian obj's underlying member method code with example usage: obj.solve_inverse(r) and returns: self