def _test_selection_plotter(selector, population, filename):
"""
Test :class:`.SelectionPlotter`.
Parameters
----------
selector : :class:`.Selector`
The selector whose selections will be plotted.
population : :class:`tuple` of :class:`.MoleculeRecord`
The population from which `selector` selects.
filename : :class:`str`
The filename for the plots.
Returns
-------
None : :class:`NoneType`
"""
stk.SelectionPlotter(filename, selector)
tuple(selector.select(population))
progress_fn=apply(pore_diameter),
),
stk.ProgressPlotter(
filename="max_window_size",
property_fn=lambda progress, mol: mol.largest_window,
y_label="Maximum Window Size / A",
filter=lambda progress, mol: mol.largest_window is not None,
progress_fn=apply(largest_window),
),
stk.ProgressPlotter(
filename="window_std",
property_fn=lambda progress, mol: mol.window_std,
y_label="Std. Dev. of Window Diameters / A",
filter=lambda progress, mol: mol.window_std is not None,
progress_fn=apply(window_std),
)
]
stk.SelectionPlotter(
filename="generational_selection",
selector=generation_selector,
)
stk.SelectionPlotter(
filename="crossover_selection",
selector=crossover_selector,
)
stk.SelectionPlotter(
filename="mutation_selection",
selector=mutation_selector,
)
)
),
stk.ProgressPlotter(
filename='window_std',
property_fn=lambda progress, mol: mol.window_std,
y_label='Std. Dev. of Window Diameters / A',
filter=lambda progress, mol:
mol.window_std is not None,
progress_fn=apply(window_std),
),
stk.ProgressPlotter(
filename='pore_diameter',
property_fn=lambda progress, mol: mol.pore_diameter,
y_label='Pore Diameter / A',
progress_fn=apply(pore_diameter),
),
]
stk.SelectionPlotter(
filename='generational_selection',
selector=generation_selector,
)
stk.SelectionPlotter(
filename='crossover_selection',
selector=crossover_selector,
)
stk.SelectionPlotter(
filename='mutation_selection',
selector=mutation_selector,
)
def main():
parser = argparse.ArgumentParser()
parser.add_argument('--mongodb_uri',
help='The MongoDB URI for the database to connect to.',
default='mongodb://localhost:27017/')
args = parser.parse_args()
logging.basicConfig(level=logging.INFO)
# Use a random seed to get reproducible results.
random_seed = 4
generator = np.random.RandomState(random_seed)
logger.info('Making building blocks.')
# Load the building block databases.
fluoros = tuple(
get_building_blocks(
path=pathlib.Path(__file__).parent / 'fluoros.txt',
functional_group_factory=stk.FluoroFactory(),
))
bromos = tuple(
get_building_blocks(
path=pathlib.Path(__file__).parent / 'bromos.txt',
functional_group_factory=stk.BromoFactory(),
))
initial_population = tuple(get_initial_population(fluoros, bromos))
# Write the initial population.
for i, record in enumerate(initial_population):
write(record.get_molecule(), f'initial_{i}.mol')
client = pymongo.MongoClient(args.mongodb_uri)
db = stk.ConstructedMoleculeMongoDb(client)
fitness_db = stk.ValueMongoDb(client, 'fitness_values')
# Plot selections.
generation_selector = stk.Best(
num_batches=25,
duplicate_molecules=False,
)
stk.SelectionPlotter('generation_selection', generation_selector)
mutation_selector = stk.Roulette(
num_batches=5,
random_seed=generator.randint(0, 1000),
)
stk.SelectionPlotter('mutation_selection', mutation_selector)
crossover_selector = stk.Roulette(
num_batches=3,
batch_size=2,
random_seed=generator.randint(0, 1000),
)
stk.SelectionPlotter('crossover_selection', crossover_selector)
fitness_calculator = stk.PropertyVector(
property_functions=(
get_num_rotatable_bonds,
get_complexity,
get_num_bad_rings,
),
input_database=fitness_db,
output_database=fitness_db,
)
fitness_normalizer = stk.NormalizerSequence(
fitness_normalizers=(
# Prevent division by 0 error in DivideByMean, by ensuring
# a value of each property to be at least 1.
stk.Add((1, 1, 1)),
stk.DivideByMean(),
# Obviously, because all coefficients are equal, the
# Multiply normalizer does not need to be here. However,
# it's here to show that you can easily change the relative
# importance of each component of the fitness value, by
# changing the values of the coefficients.
stk.Multiply((1, 1, 1)),
stk.Sum(),
stk.Power(-1),
), )
ea = stk.EvolutionaryAlgorithm(
num_processes=1,
initial_population=initial_population,
fitness_calculator=fitness_calculator,
mutator=stk.RandomMutator(
mutators=(
stk.RandomBuildingBlock(
building_blocks=fluoros,
is_replaceable=is_fluoro,
random_seed=generator.randint(0, 1000),
),
stk.SimilarBuildingBlock(
building_blocks=fluoros,
is_replaceable=is_fluoro,
random_seed=generator.randint(0, 1000),
),
stk.RandomBuildingBlock(
building_blocks=bromos,
is_replaceable=is_bromo,
random_seed=generator.randint(0, 1000),
),
stk.SimilarBuildingBlock(
building_blocks=bromos,
is_replaceable=is_bromo,
random_seed=generator.randint(0, 1000),
),
),
random_seed=generator.randint(0, 1000),
),
crosser=stk.GeneticRecombination(get_gene=get_functional_group_type, ),
generation_selector=generation_selector,
mutation_selector=mutation_selector,
crossover_selector=crossover_selector,
fitness_normalizer=fitness_normalizer,
)
logger.info('Starting EA.')
generations = []
for generation in ea.get_generations(50):
for record in generation.get_molecule_records():
db.put(record.get_molecule())
generations.append(generation)
# Write the final population.
for i, record in enumerate(generation.get_molecule_records()):
write(record.get_molecule(), f'final_{i}.mol')
logger.info('Making fitness plot.')
# Normalize the fitness values across the entire EA before
# plotting the fitness values.
generations = tuple(
normalize_generations(
fitness_calculator=fitness_calculator,
fitness_normalizer=fitness_normalizer,
generations=generations,
))
fitness_progress = stk.ProgressPlotter(
generations=generations,
get_property=lambda record: record.get_fitness_value(),
y_label='Fitness Value',
)
fitness_progress.write('fitness_progress.png')
fitness_progress.get_plot_data().to_csv('fitness_progress.csv')
logger.info('Making rotatable bonds plot.')
rotatable_bonds_progress = stk.ProgressPlotter(
generations=generations,
get_property=lambda record: get_num_rotatable_bonds(record.
get_molecule()),
y_label='Number of Rotatable Bonds',
)
rotatable_bonds_progress.write('rotatable_bonds_progress.png')
