Python structure.FeedForwardNetwork类代码示例

class MyNet:

	def __init__(self, file='config.xml'):
		self.net = FeedForwardNetwork()
		self.file = file


	def constructNet(self, input, hidden, output): 
		inputLayer = LinearLayer(input)
		hiddenLayer = TanhLayer(hidden)
		outputLayer = LinearLayer(output)

		self.net.addInputModule(inputLayer)
		self.net.addModule(hiddenLayer)
		self.net.addOutputModule(outputLayer)

		conn1 = FullConnection(inputLayer, hiddenLayer)
		conn2 = FullConnection(hiddenLayer, outputLayer)

		self.net.addConnection(conn1)
		self.net.addConnection(conn2)

	
	def setup(self):
		self.net.sortModules()

	
	def saveToFile(self,file='config.xml'):
		NetworkWriter.writeToFile(self.net, file)


	def loadFromFile(self, file='config.xml'):
		self.net = NetworkReader.readFrom(file)

def initMaxentNetwork():
  """Builds a network with just a sigmoid output layer, i.e. a multi-class maximum entropy model."""
  fnn = FeedForwardNetwork()
  inLayer = LinearLayer(numFeatures)
  fnn.addInputModule(inLayer)
  outLayer = SigmoidLayer(3)
  fnn.addOutputModule(outLayer)
  fnn.addConnection(FullConnection(inLayer, outLayer))
  fnn.sortModules()
  return fnn

  def __init__(self, num_input, num_hidden, num_output):
      # self.net = buildNetwork(num_input, num_hidden, num_output, bias = True)
    self.net = FeedForwardNetwork()

    self.num_input = num_input
    self.num_hidden = num_hidden
    self.num_output = num_output

    inLayer = LinearLayer(num_input, name='in')
    hiddenLayer1 = SigmoidLayer(num_hidden, name='hidden1')
    outLayer = LinearLayer(num_output, name='out')

    self.net.addInputModule(inLayer)
    self.net.addModule(hiddenLayer1)
    self.net.addOutputModule(outLayer)

    self.in_to_hidden = FullConnection(inLayer, hiddenLayer1)
    self.hidden_to_out = FullConnection(hiddenLayer1, outLayer)

    self.net.addConnection(self.in_to_hidden)
    self.net.addConnection(self.hidden_to_out)

    self.net.sortModules()

    self.dataset = None

    def __init__(self, train_data, hyper,  n_targets=None, label_targets=None):
        """
    ------------

    train_data: pandas DataFrame
                Contains columns for features and for target variables. The names of the target variables ends
                with the suffix "_tau"
    hyper:      dictionary
                It contains the hyperparameters necessary to run all the functionalities of the model.
                 They are the following:
                "structure" is a list of integers determining the number of neurons in each hidden layer
                "epochs" an integer specifying the maximum number of epochs to run during every training session
                "learning_rate" a float giving the learning rate of the gradient descend
                "momentum" a float giving the value of the momentum for the algorithm
                "batch" a bool. If True the method performs full batch learning, i.e. updates of the weights is done
                using all the instances of the training set. Else, normal online method is performed
                Other parameters regarding cross validation are explained in the base class

        """
        Regression.__init__(self, train_data, hyper, n_targets=n_targets, label_targets=label_targets)

        self.N = FeedForwardNetwork()
        self.structure = [self.n_feature] + hyper['structure'] + [self.n_target]

        self._build_net(self.structure)
        self.res_params = [self.N.params[i] for i in range(len(self.N.params))]

        self.train_fraction = hyper['train_fraction']
        self.seed = hyper['seed']
        self.epochs = hyper['epochs']
        self.learning_rate = hyper['learning_rate']
        self.momentum = hyper['momentum']
        self.batch = bool(hyper['batch'])

	def __init__(self, genes=None):
		self.net = FeedForwardNetwork()

		inLayer = LinearLayer(Brain.G_INPUTNODES, name='input')
		hiddenLayer1 = SigmoidLayer(Brain.G_HIDDENNODES_L1, name='hidden1')
		hiddenLayer2 = SigmoidLayer(Brain.G_HIDDENNODES_L2, name='hidden2')
		outLayer = SigmoidLayer(Brain.G_OUTPUTNODES, name='out')
		bias = BiasUnit(name='bias')

		self.net.addInputModule(inLayer)
		self.net.addModule(hiddenLayer1)
		self.net.addModule(hiddenLayer2)
		self.net.addModule(bias)
		self.net.addOutputModule(outLayer)

		in_to_hidden1 = FullConnection(inLayer, hiddenLayer1)
		hidden1_to_hidden2 = FullConnection(hiddenLayer1, hiddenLayer2)
		hidden2_to_out = FullConnection(hiddenLayer2, outLayer)
		bias_to_hidden1 = FullConnection(bias, hiddenLayer1)
		bias_to_hidden2 = FullConnection(bias, hiddenLayer2)
		bias_to_out = FullConnection(bias, outLayer)
		
		self.net.addConnection(in_to_hidden1)
		self.net.addConnection(hidden1_to_hidden2)
		self.net.addConnection(hidden2_to_out)
		self.net.addConnection(bias_to_hidden1)
		self.net.addConnection(bias_to_hidden2)
		self.net.addConnection(bias_to_out)

		self.net.sortModules()

		if genes != None:
			self.import_genes(genes)

	def PrepareModel(self, savedmodel = None):
		
		if savedmodel != None:
			self.trainer = savedmodel
		else:
			attributescount=len(self.traindata[0])
			self.ds = SupervisedDataSet(attributescount, 1)
			for i in range(len(self.traindata)):
				self.ds.appendLinked(self.traindata[i], self.trainlabel[i])
		
			self.net = FeedForwardNetwork()
			inLayer = LinearLayer(len(self.traindata[0]))
			self.net.addInputModule(inLayer)
			hiddenLayers=[]
			for i in range(self.hiddenlayerscount):
				hiddenLayer=SigmoidLayer(self.hiddenlayernodescount)
				hiddenLayers.append(hiddenLayer)
				self.net.addModule(hiddenLayer)
			outLayer = LinearLayer(1)
			self.net.addOutputModule(outLayer)
		
			layers_connections=[]
			layers_connections.append(FullConnection(inLayer, hiddenLayers[0]))
			for i in range(self.hiddenlayerscount-1):
				layers_connections.append(FullConnection(hiddenLayers[i-1], hiddenLayers[i]))
			layers_connections.append(FullConnection(hiddenLayers[-1], outLayer))
		
			for layers_connection in layers_connections:
				self.net.addConnection(layers_connection)
			self.net.sortModules()
			
			#training the self.network
			self.trainer = BackpropTrainer(self.net, self.ds)
			self.trainer.train()

    def __init__(self, hidden_layers, data_index_size):

        self.network = FeedForwardNetwork()

        connect_queue = Queue.Queue()
        
        for layer in xrange(0, hidden_layers):
            connect_queue.put(TanhLayer(data_index_size, name = 'hidden_layer_{}'.format(layer)))

        connect_queue.put(SigmoidLayer(1, name = 'output_layer'))

        prev_layer = LinearLayer(data_index_size, name = 'input_layer')
        self.network.addInputModule(prev_layer)
        
        while not connect_queue.empty():
            print 'layer'
            current_layer = connect_queue.get()
            if current_layer.name == 'output_layer':
                self.network.addOutputModule(current_layer)
            else:
                self.network.addModule(current_layer)

            bias = BiasUnit()
            bias_connection = FullConnection(bias, current_layer, name = "bias_to_{}_connection".format(current_layer.name))
            self.network.addModule(bias)
            self.network.addConnection(bias_connection)
            
            connection = FullConnection(prev_layer, current_layer, name = "{}_to_{}_connection".format(prev_layer.name, current_layer.name))
            self.network.addConnection(connection)
            
            prev_layer = current_layer

        print 'sorting....'
        self.network.sortModules()

 def __init__(self, x, y, direction):
   self.age = 0
   # position
   self.x = x
   self.y = y
   # number of going back and forth for different foods
   self.backForth = 0
   self.LastFood = None # the last food animat ate
   # orientation (0 - 359 degrees)
   self.direction = direction
   # carrying food
   self.food = None
   # touching anything
   self.touching = None
   self.sees = None
   # hunger sensor
   self.fruit_hunger = 2000
   self.veggie_hunger = 2000
   self.avg_fruit_hunger = 0
   self.avg_veggie_hunger = 0
   # neural net
   self.net = FeedForwardNetwork()
   self.net.addInputModule(LinearLayer(12, name='in'))
   self.net.addModule(SigmoidLayer(13, name='hidden'))
   self.net.addOutputModule(LinearLayer(6, name='out'))
   self.net.addConnection(FullConnection(self.net['in'], self.net['hidden']))
   self.net.addConnection(FullConnection(self.net['hidden'], self.net['out']))
   self.net.sortModules()
   # thresholds for deciding an action
   self.move_threshold = 0
   self.pickup_threshold = 0
   self.putdown_threshold = 0
   self.eat_threshold = 0

  def __init__(self, input_size, output_size, number_of_layers=3, size_of_hidden_layers=3, type_of_hidden_layer='sigmoid', net_bias=False, epochs=100):
    self.net = FeedForwardNetwork()
    self.num_epochs = epochs
    # set up layers of the network
    layers = []

    for i in range(number_of_layers):
      if i == 0:
        layers.append(LinearLayer(input_size))
        self.net.addInputModule(layers[i])
      elif i == (number_of_layers-1):
        layers.append(LinearLayer(output_size))
        self.net.addOutputModule(layers[i])
        self.net.addConnection(FullConnection(layers[i-1], layers[i]))
      else:
        if type_of_hidden_layer == 'linear':
          layers.append(LinearLayer((input_size + output_size) / 2))
        elif type_of_hidden_layer == 'sigmoid':
          layers.append(SigmoidLayer((input_size + output_size) / 2))
        elif type_of_hidden_layer == 'tanh':
          layers.append(TanhLayer((input_size + output_size) / 2))
        self.net.addModule(layers[i])
        self.net.addConnection(FullConnection(layers[i-1], layers[i]))

    self.net.sortModules()
    self.input_size = input_size
    self.output_size = output_size

    def __init__(self, grid_size, hidden_list):
        """Sets up the neural network.

        @param grid_size: the size of the grid, for specifying the input layer.
        @param hidden_list: a list containing the number of nodes in each hidden layer.
        """
        self.net = FeedForwardNetwork()

        in_layer = LinearLayer(grid_size*grid_size)
        self.net.addInputModule(in_layer)
        out_layer = LinearLayer(4)
        self.net.addOutputModule(out_layer)

        hidden_layers = []
        for i in hidden_list:
            hidden_layer = SigmoidLayer(i)
            hidden_layers.append(hidden_layer)
            self.net.addModule(hidden_layer)

        self.net.addConnection(FullConnection(in_layer, hidden_layers[0]))
        if len(hidden_layers) > 1:
            for i in range(1, len(hidden_layers) - 1):
                self.net.addConnection(FullConnection(hidden_layers[i], hidden_layers[i+1]))
        self.net.addConnection(FullConnection(hidden_layers[-1], out_layer))

        self.net.sortModules()

def _new_1h_net(window):
    net     = FeedForwardNetwork()
    inl     = SigmoidLayer(window*window*2+1)
    hidden1 = SigmoidLayer(window*window*2)
    outl    = SigmoidLayer(1)
    net.addInputModule(inl)
    net.addModule(hidden1)
    net.addOutputModule(outl)
    c1 = FullConnection(inl, hidden1)
    c2 = FullConnection(hidden1, outl)
    net.addConnection(c1)
    net.addConnection(c2)
    return net

def simple_network(data, digit, train_ds, test_ds):
#     n = buildNetwork(train_ds.indim, 1, train_ds.outdim, outclass=SoftmaxLayer)
    n = FeedForwardNetwork()
    inLayer = LinearLayer(64)
    outLayer = SoftmaxLayer(10)
    n.addInputModule(inLayer)
    n.addOutputModule(outLayer)
    n.addConnection(FullConnection(inLayer, outLayer))
    n.sortModules()
    trainer = BackpropTrainer(n, dataset=train_ds, momentum=0.1, verbose=True,
                              weightdecay=0.01)
    trainer.trainUntilConvergence(maxEpochs=25)
    result = percentError(trainer.testOnClassData(dataset=test_ds),
                          test_ds['class'])
#     result = validate(trainer, train_ds, 5, 10)
    print 'Simple network - Percent Error', result
    return result

  def __init__(self, hidden_neuron_num=1, hidden_type='sigmoid'):
    self.hidden_neuron_num = hidden_neuron_num
    self.hidden_type = hidden_type

    self.net = FeedForwardNetwork()
    self.samples = SupervisedDataSet(784, 784)

    self.vectorizer = ImageVectorizer()

    self.add_layers()
    self.add_connections()
    self.sort()

	def __init__(self, num_features, num_hidden_neurons):
		super(NNet,self).__init__(num_features)

		self.ds = SupervisedDataSet(num_features, 1)

		self.net = FeedForwardNetwork()
		self.net.addInputModule(LinearLayer(num_features, name='in'))
		self.net.addModule(LinearLayer(num_hidden_neurons, name='hidden'))
		self.net.addOutputModule(LinearLayer(1, name='out'))
		self.net.addConnection(FullConnection(self.net['in'], self.net['hidden'], name='c1'))
		self.net.addConnection(FullConnection(self.net['hidden'], self.net['out'], name='c2'))
		self.net.sortModules()

    def train(self):

        n = FeedForwardNetwork()

        dataModel = SongFactory(self.major).getModels()

        ds = SupervisedDataSet(static.NUM_OF_INPUTS, 1)

        #adds samples from the data received from songfactory and the k
        for data in dataModel:
            for input, target in data.model:
                print input, target
                ds.addSample(input, target)


        #instantiate the network
        self.net = FeedForwardNetwork()
        bias = BiasUnit()
        self.net.addModule(bias)

        #create the layers of the network
        inLayer = LinearLayer(static.NUM_OF_INPUTS)
        outLayer = LinearLayer(1)
        hidden1 = SigmoidLayer(25)
        hidden2 = SigmoidLayer(5)

        #add the layers
        self.net.addInputModule(inLayer)
        self.net.addOutputModule(outLayer)
        self.net.addModule(hidden1)
        self.net.addModule(hidden2)

        #create the connection
        in_h1 = FullConnection(inLayer,hidden1)
        h1_h2 = FullConnection(hidden1, hidden2)
        h2_out = FullConnection(hidden2, outLayer)
        b_h1  = FullConnection(bias, hidden1)
        b_h2  = FullConnection(bias, hidden2)

        #add the connection
        self.net.addConnection(in_h1)
        self.net.addConnection(h1_h2)
        self.net.addConnection(h2_out)
        self.net.addConnection(b_h1)
        self.net.addConnection(b_h2)

        self.net.sortModules()

        #trainer to edit the network
        trainer = BackpropTrainer(self.net, ds, learningrate = 0.003)

        trainer.trainEpochs(25)