Revert "remove DEBUG"

bnavigator · bnavigator · commit 5939d9644fca · 2021-11-04T21:11:19.000+01:00
This reverts commit fb56d92.
diff --git a/control/statesp.py b/control/statesp.py
@@ -919,6 +919,11 @@ def horner(self, x, warn_infinite=True):
                 try:
                     xI_A = x_idx * eye(self.nstates) - self.A
                     xI_A_inv = solve(xI_A, self.B)
+                    # gh-664: xI_A did not raise singular matrix error,
+                    print(f"DEBUG np.linalg.solve(\n,"
+                          f"{xI_A}\n"
+                          f"{self.B} = \n"
+                          f"{xI_A_inv}")
                     out[:, :, idx] = np.dot(self.C, xI_A_inv) + self.D
                 except LinAlgError:
                     # Issue a warning messsage, for consistency with xferfcn
