added result flag to get_extra_info

Author: waldemar-martens

pyoptgra/optgra.py

@@ -583,6 +583,11 @@ def extract_trailing_integer(s):
         )
 
         best_x, best_f, finopt = result
+        # FINOPT
+        # -> 1=    MATCHED &     OPTIMAL
+        # -> 2=    MATCHED & NOT OPTIMAL
+        # -> 3=NOT MATCHED & NOT OPTIMAL
+        # -> 4=NOT FEASIBL & NOT OPTIMAL
 
         # if a Khan function is used we first need to convert to pagmo parameters
         if khanf:
@@ -604,6 +609,7 @@ def extract_trailing_integer(s):
             "con_tol": problem.c_tol,
             "nec": problem.get_nec(),
             "has_gradient": problem.has_gradient(),
+            "finopt": finopt,
         }
 
         return population
@@ -865,8 +871,15 @@ def get_extra_info(self) -> str:
                 + "Final objective value .............  {obj}\n"
                 + "Final constraint violation ........  {con_vio}\n"
                 + "Final num. of violated constraints   {num_vio}\n"
-                + "Successful termination: Optimal Solution Found.\n"
             ).format(obj=self.__last_result["f"][0], con_vio=con_vio, num_vio=num_vio)
+            if self.__last_result["finopt"] == 1:
+                result_str += "Successful termination: Optimal Solution Found.\n"
+            elif self.__last_result["finopt"] == 2:
+                result_str += "Successful termination: Constraints matched.\n"
+            elif self.__last_result["finopt"] == 3:
+                result_str += "Not converged.\n"
+            elif self.__last_result["finopt"] == 4:
+                result_str += "Problem appears infeasible.\n"
         else:
             grad_str = ""
             result_str = (