fix roulette wheel

Author: tranhuyhung1998

geneticpython/core/operators/replacement/roulette_wheel_replacement.py

@@ -22,10 +22,10 @@ def replace(self, size: int, population: List[Individual],
         selection = RouletteWheelSelection()
         best_indv = min(population, key=lambda indv: indv._objective)
 
-        bad_pop = list()
-        for indv in population:
-            if not abs(indv._objective - best_indv._objective) < self.__EPS:
-                bad_pop.append(indv)
+        bad_pop = population.copy()
+        # for indv in population:
+        #     if not abs(indv._objective - best_indv._objective) < self.__EPS:
+        #         bad_pop.append(indv)
 
         new_population = [best_indv]
         new_population.extend(selection.select(

geneticpython/core/operators/selection/roulette_wheel_selection.py

@@ -39,7 +39,7 @@ def select(self, size: int,
                 idx -= 1
 
             if idx == -len(selected):
-                idx = random_state.randint(0, len(selected)-1)
+                idx = random_state.randint(0, len(selected))
 
             selected_indvs.append(population[idx])
             selected[idx] = False