def _mix_row(layout, row_idx, parent_rows, parameters):
row = Row()
blocks = random_list_element([len(p.blocks) for p in parent_rows])
for block_idx in range(blocks):
parent_blocks = [p.blocks[block_idx] for p in parent_rows if block_idx < len(p.blocks)]
parent = random_list_element(parent_blocks)
new_block = deepcopy(parent)
row.blocks.append(new_block)
return row
def _instantiate_layout_block(layout, row_idx, experiment_parameters, init_layer_parameters=False):
block_layout = layout.block
if _is_multiple_block_layouts_defined(layout):
block_layout = random_list_element(layout.block)
block = Block()
_setup_block_input(layout, row_idx, block, experiment_parameters)
block.layers = _create_template_layers(
block_layout,
experiment_parameters,
init_layer_parameters=init_layer_parameters)
return block
def _mutate_layout_layers(layout, parameters):
row = random_list_element(layout.rows)
block = random_list_element(row.blocks)
current_layers = len(block.get_layers())
new_layers = mutate_param(
parameters.get_layout_parameter('layers'),
current_layers)
if new_layers > current_layers:
for _ in range(current_layers, new_layers):
layers = get_allowed_new_block_layers(block.layers, parameters)
block.layers += _create_template_layers(
[random_list_element(layers)],
parameters,
init_layer_parameters=True)
else:
while len(block.layers) > new_layers:
idx = rand.randint(0, len(block.layers) - 1)
block.layers = [
l
for i, l in enumerate(block.layers)
if i != idx]
def _mix_layouts(parent_layouts, parameters, p_mutate_param=0.05):
layout = Layout(
input_size=parent_layouts[0].input_size,
output_size=parent_layouts[0].output_size,
output_activation=parent_layouts[0].output_activation,
block=parent_layouts[0].block,
block_input=parent_layouts[0].block_input)
if parameters.is_layout_search():
rows = random_list_element([len(p.rows) for p in parent_layouts])
for row_idx in range(rows):
parent_rows = [p.rows[row_idx] for p in parent_layouts if row_idx < len(p.rows)]
layout.rows.append(_mix_row(layout, row_idx, parent_rows, parameters))
_setup_block_inputs(layout, parameters)
if parameters.is_parameters_search():
_mutate_layer_parameters(
layout,
parameters,
p_mutate_param=p_mutate_param)
else:
layout.rows = random_list_element([
parent_layouts[0].rows,
parent_layouts[1].rows])
return layout
def _mix_trainings(parents, parameters, p_mutate_param=0.05):
training = Training(
objective=parents[0].objective,
optimizer=None,
metric=parents[0].metric,
stopping=parents[0].stopping,
batch_size=parents[0].batch_size)
parent_optimizers = [p.optimizer for p in parents]
if parameters.is_optimizer_search():
training.optimizer = _mix_optimizers(parent_optimizers)
_mutate_optimizer(training.optimizer, parameters, p_mutate_param)
else:
training.optimizer = random_list_element(parent_optimizers)
return training
def _mutate_layout_blocks(layout, parameters):
row = random_list_element(layout.rows)
row_idx = layout.rows.index(row)
current_blocks = len(row.get_blocks())
new_blocks = mutate_param(
parameters.get_layout_parameter('blocks'),
current_blocks)
if new_blocks > current_blocks:
for _ in range(current_blocks, new_blocks):
row.blocks.append(
_random_layout_block(
layout,
row_idx,
parameters,
init_layer_parameters=True))
else:
while len(row.blocks) > new_blocks:
idx = rand.randint(0, len(row.blocks) - 1)
row.blocks = [
b
for i, b in enumerate(row.blocks)
if i != idx]
def _random_layout_block(layout, row_idx,
experiment_parameters, init_layer_parameters=False):
if layout.block:
return _instantiate_layout_block(
layout,
row_idx,
experiment_parameters,
init_layer_parameters=init_layer_parameters)
layers = random_initial_param_value(experiment_parameters.get_layout_parameter('layers'))
template = []
for _ in range(layers):
allowed_layers = get_allowed_new_block_layers(template, experiment_parameters)
if len(allowed_layers) == 0:
break
new_layer = random_list_element(allowed_layers)
template.append(new_layer)
block = Block()
_setup_block_input(layout, row_idx, block, experiment_parameters)
block.layers += _create_template_layers(
template,
experiment_parameters,
init_layer_parameters)
return block
def _mix_optimizers(parents):
return deepcopy(random_list_element(parents))
