Fixed a bug in the calculator destructor (#168)

* Fixed a bug in the calculator destructor

* Fixed problem with process pool destruction

* The design of the example is brought to a single sample

Author: LebedevIlyaG

examples/GKLS_example.py

@@ -5,8 +5,7 @@
 from iOpt.output_system.listeners.static_painters import StaticPainterNDListener
 from iOpt.output_system.listeners.console_outputers import ConsoleOutputListener
 
-
-def SolveSingleGKLS():
+if __name__ == "__main__":
     """
     Минимизация тестовой функции из GKLS генератора с номером 39
     """
@@ -32,6 +31,3 @@ def SolveSingleGKLS():
     # Решение задачи
     solver.solve()
 
-
-if __name__ == "__main__":
-    SolveSingleGKLS()

examples/GKLS_timeout_example.py

@@ -3,8 +3,7 @@
 from iOpt.solver_parametrs import SolverParameters
 from problems.GKLS import GKLS
 
-
-def SolveSingleGKLS():
+if __name__ == "__main__":
     """
     Минимизация тестовой функции из GKLS генератора с номером 39
     """
@@ -25,7 +24,3 @@ def SolveSingleGKLS():
 
     # Решение задачи
     solver.solve()
-
-
-if __name__ == "__main__":
-    SolveSingleGKLS()

iOpt/method/calculator.py

@@ -30,7 +30,7 @@ def __init__(self,
         self.evaluate_method = evaluate_method
         self.parameters = parameters
         Calculator.worker_init(self.evaluate_method)
-        Calculator.pool = _ProcessPool(parameters.number_of_parallel_points,
+        self.pool = _ProcessPool(parameters.number_of_parallel_points,
                                        initializer=Calculator.worker_init,
                                        initargs=(self.evaluate_method,))
 
@@ -78,7 +78,7 @@ def calculate_functionals_for_items(self, points: list[SearchDataItem]) -> list[
                                 discrete_value_index=point.get_discrete_value_index())
             points_copy.append(sd)
 
-        points_res = Calculator.pool.map(Calculator.worker, points_copy)
+        points_res = self.pool.map(Calculator.worker, points_copy)
 
         for point, point_r in zip(points, points_res):
             self.evaluate_method.copy_functionals(point, point_r)