Minor changes and fixes

__iter__ has to return an iter

src/structure/chromosome.py

@@ -57,17 +57,17 @@ class Chromosome:
 
     def __iter__(self):
         """Returns an iterable of the gene list"""
-        return self.gene_list
+        return iter(self.gene_list)
 
 
-    def __getitem__(self, k):
-        """Returns the k-th gene"""
-        return self.get_gene(k)
+    def __getitem__(self, index):
+        """Returns the indexed gene"""
+        return self.gene_list[index]
 
 
-    def __setitem__(self, k, gene):
-        """Sets the k-th gene value"""
-        self.set_gene(gene, k)
+    def __setitem__(self, index, gene):
+        """Sets the indexed gene value"""
+        self.gene_list[index] = gene
 
 
     def __len__(self):

src/structure/population.py

@@ -21,18 +21,18 @@ class Population:
 
 
     def remove_chromosome(self, index):
-        """Removes a chromosome from the indicated index from the population"""
-        del self.chromosome_list[index]
+        """Removes and returns a chromosome from the indicated index from the population"""
+        return self.chromosome_list.pop(index)
 
 
     def remove_parent(self, index):
-        """Removes a parent from the indicated index from the mating pool"""
-        del self.mating_pool[index]
+        """Removes and returns a parent from the indicated index from the mating pool"""
+        return self.mating_pool.pop(index)
 
 
     def remove_child(self, index):
-        """Removes a child from the indicated index from the next population"""
-        del self.next_population[index]
+        """Removes and returns a child from the indicated index from the next population"""
+        return self.next_population.pop(index)
 
 
     def reset_mating_pool(self):
@@ -153,17 +153,17 @@ class Population:
 
     def __iter__(self):
         """Returns an iterable of chromosomes"""
-        return self.chromosome_list
+        return iter(self.chromosome_list)
 
 
-    def __getitem__(self, k):
-        """Returns the k-th chromosome"""
-        return self.get_chromosome(k)
+    def __getitem__(self, index):
+        """Returns the indexed chromosome"""
+        return self.chromosome_list[index]
 
 
-    def __setitem__(self, k, chromosome):
-        """Sets the k-th chromosome"""
-        self.set_chromosome(chromosome, k)
+    def __setitem__(self, index, chromosome):
+        """Sets the indexed chromosome"""
+        self.chromosome_list[index] = chromosome
 
 
     def __len__(self):