def clean_layers(connection):
"""
Clean layers connections and format transform them into one format.
Also this function validate layers connections.
Parameters
----------
connection : list, tuple or object
Layers connetion in different formats.
Returns
-------
object
Cleaned layers connection.
"""
if is_list_of_integers(connection):
connection = generate_layers(list(connection))
if isinstance(connection, tuple):
connection = list(connection)
islist = isinstance(connection, list)
layer_types = (layers.BaseLayer, LayerConnection)
if islist and isinstance(connection[0], layer_types):
chain_connection = connection.pop()
for layer in reversed(connection):
chain_connection = LayerConnection(layer, chain_connection)
connection = chain_connection
if not isinstance(connection.input_layer, layers.Input):
raise NetworkConnectionError("First layer must be layers.Input class "
"instance.")
all_layers = list(connection)
if any(isinstance(layer, layers.Input) for layer in all_layers[1:]):
raise NetworkConnectionError("Only the first layer can be instance "
"of layers.Input class.")
return connection
def __init__(self, connection, **options):
if len(connection) != 2:
raise ValueError("This network should contains two layers.")
if is_list_of_integers(connection):
input_layer_size, output_layer_size = connection
connection = Input(input_layer_size) > Step(output_layer_size)
if not isinstance(connection, LayerConnection):
raise ValueError("Invalid network connection structure.")
if not isinstance(connection.output_layer, Step):
raise NetworkConnectionError(
"Final layer should contains step activation function "
"(``layers.Step`` class instance).")
super(BaseLinearNetwork, self).__init__(connection, **options)
def clean_layers(connection):
""" Clean layers connections and format transform them into one format.
Also this function validate layers connections.
Parameters
----------
connection : list, tuple or object
Layers connetion in different formats.
Returns
-------
object
Cleaned layers connection.
"""
if is_list_of_integers(connection):
connection = generate_layers(list(connection))
if isinstance(connection, tuple):
connection = list(connection)
islist = isinstance(connection, list)
if islist and isinstance(connection[0], BaseLayer):
chain_connection = connection.pop()
for layer in reversed(connection):
chain_connection = LayerConnection(layer, chain_connection)
connection = chain_connection
elif islist and isinstance(connection[0], LayerConnection):
pass
if not isinstance(connection.output_layer, Output):
raise NetworkConnectionError("Final layer must be Output class "
"instance.")
return connection
def relate_to(self, right_layer):
raise NetworkConnectionError("Can't create connection "
"from output layer")