code: def linsolve(self, sys, mtx, rhs, autoTranspose=False):
          
  
          if sys not in umfSys:
              raise ValueError('sys must be in' % umfSys)
  
          if self._numeric is None:
              self.numeric(mtx)
          else:
              if self.mtx is not mtx:
                  self.numeric(mtx)
  
          sol = self.solve(sys, mtx, rhs, autoTranspose)
          self.free_numeric()
  
          return sol
docs: One-shot solution of system of linear equation. Reuses Numeric object
          if possible.
  
          Parameters
          ----------
          sys : constant
              one of UMFPACK system description constants, like
              UMFPACK_A, UMFPACK_At, see umfSys list and UMFPACK docs
          mtx : scipy.sparse.csc_matrix or scipy.sparse.csr_matrix
              Input.
          rhs : ndarray
              Right Hand Side
          autoTranspose : bool
              Automatically changes `sys` to the transposed type, if `mtx` is in CSR,
              since UMFPACK assumes CSC internally
  
          Returns
          -------
          sol : ndarray
              Solution to the equation system.