Further split values to chromosomes decorator

src/crossover/crossover_methods.py

@@ -1,27 +1,30 @@
 import random
 
 def append_children_from_mating_pool(crossover_method):
-    def helper(ga):
+    return lambda ga:\
-        mating_pool = ga.population.mating_pool
         ga.population.append_children(
-            [chromosome for chromosome in crossover_method(ga, mating_pool)]
+            [chromosome for chromosome in crossover_method(ga, ga.population.mating_pool)]
         )
-    return helper
 
-def values_to_chromosome(crossover_method):
+
-    def helper(ga, parent_1, parent_2):
+def genes_to_chromosome(crossover_method):
-        return ga.make_chromosome([
+    return lambda ga, parent_1, parent_2:\
-                   ga.make_gene(value)
+        return ga.make_chromosome(crossover_method(ga, parent_1, parent_2))
-               for value in crossover_method(ga, parent_1, parent_2)])
+
-    return helper
+
+def values_to_genes(crossover_method):
+    return lambda ga, parent_1, parent_2:\
+        return (ga.make_gene(value) for value in crossover_method(ga, parent_1, parent_2))
 
 
 class Crossover_Methods:
 
     def __append_children_from_mating_pool(crossover_method):
         return append_children_from_mating_pool(crossover_method)
-    def __values_to_chromosome(crossover_method):
+    def __genes_to_chromosome(crossover_method):
         return values_to_chromosome(crossover_method)
+    def __values_to_genes(crossover_method):
+        return values_to_genes(crossover_method)
 
 
     class Population:
@@ -61,30 +64,33 @@ class Crossover_Methods:
         """Methods for crossing parents."""
 
 
+        @genes_to_chromosome
         def single_point(ga, parent_1, parent_2):
             """Cross two parents by swapping genes at one random point."""
 
             swap_index = random.randint(0, len(parent_1)-1)
-            return ga.make_chromosome(parent_1[:swap_index] + parent_2[swap_index:])
+            return parent_1[:swap_index] + parent_2[swap_index:]
 
 
+        @genes_to_chromosome
         def multi_point(ga, parent_1, parent_2):
             """Cross two parents by swapping genes at multiple points."""
             pass
 
 
+        @genes_to_chromosome
         def uniform(ga, parent_1, parent_2):
             """Cross two parents by swapping all genes randomly."""
 
-            return ga.make_chromosome([                          # Make a new chromosome
+            for gene_pair in zip(parent_1, parent_2):
-                    random.choice([gene_1, gene_2])              # by randomly selecting genes
+                yield random.choice(gene_pair)
-                for gene_1, gene_2 in zip(parent_1, parent_2)])  # from each parent
 
 
         class Arithmetic:
             """Crossover methods for numerical genes."""
 
-            @values_to_chromosome
+            @genes_to_chromosome
+            @values_to_genes
             def int_random(ga, parent_1, parent_2):
                 """Cross two parents by taking a random integer value between each of the genes."""
 
@@ -95,7 +101,8 @@ class Crossover_Methods:
                     yield random.randint(*sorted([value_1, value_2]))
 
 
-            @values_to_chromosome
+            @genes_to_chromosome
+            @values_to_genes
             def int_weighted(ga, parent_1, parent_2):
                 """Cross two parents by taking a a weighted average of the genes."""
 
@@ -109,7 +116,8 @@ class Crossover_Methods:
                     yield int(weight*value_1+(1-weight)*value_2)
 
 
-            @values_to_chromosome
+            @genes_to_chromosome
+            @values_to_genes
             def float_random(ga, parent_one, parent_two):
                 """Cross two parents by taking a random numeric value between each of the genes."""
 
@@ -120,7 +128,8 @@ class Crossover_Methods:
                     yield random.uniform([value_1, value_2])
 
 
-            @values_to_chromosome
+            @genes_to_chromosome
+            @values_to_genes
             def float_weighted(ga, parent_one, parent_two):
                 """Cross two parents by taking a a weighted average of the genes."""