Skip to content

Navigation Menu

Sign in
Appearance settings

Search code, repositories, users, issues, pull requests...

Provide feedback

We read every piece of feedback, and take your input very seriously.

Saved searches

Use saved searches to filter your results more quickly
Sign up
Appearance settings

Commit d06837b

Browse files
Generate constrained random values
1 parent 33f443e commit d06837b

15 files changed

+213
-46
lines changed

‎example.py

Lines changed: 28 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,28 @@
1+
import pygad
2+
import numpy
3+
4+
function_inputs = [4,-2,3.5,5,-11,-4.7]
5+
desired_output = 44
6+
7+
def fitness_func(ga_instance, solution, solution_idx):
8+
output = numpy.sum(solution*function_inputs)
9+
fitness = 1.0 / (numpy.abs(output - desired_output) + 0.000001)
10+
return fitness
11+
12+
num_genes = len(function_inputs)
13+
14+
ga_instance = pygad.GA(num_generations=100,
15+
num_parents_mating=10,
16+
sol_per_pop=20,
17+
num_genes=num_genes,
18+
mutation_num_genes=6,
19+
fitness_func=fitness_func,
20+
# suppress_warnings=True,
21+
random_mutation_min_val=4,
22+
random_mutation_max_val=10,
23+
mutation_by_replacement=True,
24+
gene_type=int,
25+
# mutation_probability=0.4,
26+
gene_constraint=[lambda x: x[0]>=8,None,None,None,None,None])
27+
28+
ga_instance.run()
227 Bytes
Binary file not shown.

‎pygad/__pycache__/pygad.cpython-310.pyc

80.4 KB
Binary file not shown.
255 Bytes
Binary file not shown.
15.9 KB
Binary file not shown.

‎pygad/helper/unique.py

Lines changed: 1 addition & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -316,7 +316,6 @@ def unique_genes_by_space(self,
316316
# Update the list of duplicate indices after each iteration.
317317
_, unique_gene_indices = numpy.unique(new_solution, return_index=True)
318318
not_unique_indices = set(range(len(new_solution))) - set(unique_gene_indices)
319-
# self.logger.info("not_unique_indices INSIDE", not_unique_indices)
320319

321320
return new_solution, not_unique_indices, num_unsolved_duplicates
322321

@@ -551,7 +550,7 @@ def find_two_duplicates(self,
551550
# This means there is no way to solve the duplicates between the genes.
552551
# Because the space of the duplicates genes only has a single value and there is no alternatives.
553552
return None, gene
554-
553+
555554
def unpack_gene_space(self,
556555
range_min,
557556
range_max,

‎pygad/pygad.py

Lines changed: 18 additions & 12 deletions
Original file line numberDiff line numberDiff line change
@@ -564,24 +564,30 @@ def __init__(self,
564564
# Validate that gene_constraint is a list or tuple and every element inside it is either None or callable.
565565
if gene_constraint:
566566
if type(gene_constraint) in [list, tuple]:
567-
for constraint_idx, item in enumerate(gene_constraint):
568-
# Check whether the element is None or a callable.
569-
if item and callable(item):
570-
if item.__code__.co_argcount == 1:
571-
# Every callable is valid if it receives a single argument.
572-
# This argument represents the solution.
567+
if len(gene_constraint) == self.num_genes:
568+
for constraint_idx, item in enumerate(gene_constraint):
569+
# Check whether the element is None or a callable.
570+
if item is None:
573571
pass
572+
elif item and callable(item):
573+
if item.__code__.co_argcount == 1:
574+
# Every callable is valid if it receives a single argument.
575+
# This argument represents the solution.
576+
pass
577+
else:
578+
self.valid_parameters = False
579+
raise ValueError(f"Every callable inside the gene_constraint parameter must accept a single argument representing the solution/chromosome. But the callable at index {constraint_idx} named '{item.__code__.co_name}' accepts {item.__code__.co_argcount} argument(s).")
574580
else:
575581
self.valid_parameters = False
576-
raise ValueError(f"Every callable inside the gene_constraint parameter must accept a single argument representing the solution/chromosome. But the callable at index {constraint_idx} named '{item.__code__.co_name}' accepts {item.__code__.co_argcount} argument(s).")
577-
else:
578-
self.valid_parameters = False
579-
raise TypeError(f"The expected type of an element in the 'gene_constraint' parameter is None or a callable (e.g. function). But {item} at index {constraint_idx}of type {type(item)} found.")
582+
raise TypeError(f"The expected type of an element in the 'gene_constraint' parameter is None or a callable (e.g. function). But {item}at index {constraint_idx} of type {type(item)} found.")
583+
else:
584+
self.valid_parameters = False
585+
raise ValueError(f"The number of constrains ({len(gene_constraint)}) in the 'gene_constraint' parameter must be equal to the number of genes ({self.num_genes}).")
580586
else:
581587
self.valid_parameters = False
582-
raise TypeError(f"The expected type of the 'gene_constraint' parameter is either list or tuple. But the value {gene_constraint} of type {type(gene_constraint)} found.")
588+
raise TypeError(f"The expected type of the 'gene_constraint' parameter is either a list or tuple. But the value {gene_constraint} of type {type(gene_constraint)} found.")
583589
else:
584-
# It is None.
590+
# gene_constraint is None and not used.
585591
pass
586592

587593
self.gene_constraint = gene_constraint
354 Bytes
Binary file not shown.
5.93 KB
Binary file not shown.
24.4 KB
Binary file not shown.

0 commit comments

Comments
(0)

AltStyle によって変換されたページ (->オリジナル) /