Python tensor.bvector方法代碼示例

# 需要導入模塊: from theano import tensor [as 別名]
# 或者: from theano.tensor import bvector [as 別名]
def test_param_allow_downcast_int(self):
        a = tensor.wvector('a')  # int16
        b = tensor.bvector('b')  # int8
        c = tensor.bscalar('c')  # int8
        f = pfunc([In(a, allow_downcast=True),
                   In(b, allow_downcast=False),
                   In(c, allow_downcast=None)],
                  (a + b + c))

        # Both values are in range. Since they're not ndarrays (but lists),
        # they will be converted, and their value checked.
        assert numpy.all(f([3], [6], 1) == 10)

        # Values are in range, but a dtype too large has explicitly been given
        # For performance reasons, no check of the data is explicitly performed
        # (It might be OK to change this in the future.)
        self.assertRaises(TypeError, f,
                          [3], numpy.array([6], dtype='int16'), 1)

        # Value too big for a, silently ignored
        assert numpy.all(f([2 ** 20], numpy.ones(1, dtype='int8'), 1) == 2)

        # Value too big for b, raises TypeError
        self.assertRaises(TypeError, f, [3], [312], 1)

        # Value too big for c, raises TypeError
        self.assertRaises(TypeError, f, [3], [6], 806) 

# 需要導入模塊: from theano import tensor [as 別名]
# 或者: from theano.tensor import bvector [as 別名]
def test_allow_input_downcast_int(self):
        a = tensor.wvector('a')  # int16
        b = tensor.bvector('b')  # int8
        c = tensor.bscalar('c')  # int8

        f = pfunc([a, b, c], (a + b + c), allow_input_downcast=True)
        # Value too big for a, b, or c, silently ignored
        assert f([2 ** 20], [1], 0) == 1
        assert f([3], [312], 0) == 59
        assert f([3], [1], 806) == 42

        g = pfunc([a, b, c], (a + b + c), allow_input_downcast=False)
        # All values are in range. Since they're not ndarrays (but lists
        # or scalars), they will be converted, and their value checked.
        assert numpy.all(g([3], [6], 0) == 9)

        # Values are in range, but a dtype too large has explicitly been given
        # For performance reasons, no check of the data is explicitly performed
        # (It might be OK to change this in the future.)
        self.assertRaises(TypeError, g,
                          [3], numpy.array([6], dtype='int16'), 0)

        # Value too big for b, raises TypeError
        self.assertRaises(TypeError, g, [3], [312], 0)

        h = pfunc([a, b, c], (a + b + c))  # Default: allow_input_downcast=None
        # Everything here should behave like with False
        assert numpy.all(h([3], [6], 0) == 9)
        self.assertRaises(TypeError, h,
                          [3], numpy.array([6], dtype='int16'), 0)
        self.assertRaises(TypeError, h, [3], [312], 0) 

# 需要導入模塊: from theano import tensor [as 別名]
# 或者: from theano.tensor import bvector [as 別名]
def test_param_allow_downcast_int(self):
        a = tensor.wvector('a')  # int16
        b = tensor.bvector('b')  # int8
        c = tensor.bscalar('c')  # int8
        f = pfunc([In(a, allow_downcast=True),
                   In(b, allow_downcast=False),
                   In(c, allow_downcast=None)],
                  (a + b + c))

        # Both values are in range. Since they're not ndarrays (but lists),
        # they will be converted, and their value checked.
        assert numpy.all(f([3], [6], 1) == 10)

        # Values are in range, but a dtype too large has explicitly been given
        # For performance reasons, no check of the data is explicitly performed
        # (It might be OK to change this in the future.)
        self.assertRaises(TypeError, f,
                [3], numpy.array([6], dtype='int16'), 1)

        # Value too big for a, silently ignored
        assert numpy.all(f([2 ** 20], numpy.ones(1, dtype='int8'), 1) == 2)

        # Value too big for b, raises TypeError
        self.assertRaises(TypeError, f, [3], [312], 1)

        # Value too big for c, raises TypeError
        self.assertRaises(TypeError, f, [3], [6], 806) 

# 需要導入模塊: from theano import tensor [as 別名]
# 或者: from theano.tensor import bvector [as 別名]
def test_allow_input_downcast_int(self):
        a = tensor.wvector('a')  # int16
        b = tensor.bvector('b')  # int8
        c = tensor.bscalar('c')  # int8

        f = pfunc([a, b, c], (a + b + c), allow_input_downcast=True)
        # Value too big for a, b, or c, silently ignored
        assert f([2 ** 20], [1], 0) == 1
        assert f([3], [312], 0) == 59
        assert f([3], [1], 806) == 42

        g = pfunc([a, b, c], (a + b + c), allow_input_downcast=False)
        # All values are in range. Since they're not ndarrays (but lists
        # or scalars), they will be converted, and their value checked.
        assert numpy.all(g([3], [6], 0) == 9)

        # Values are in range, but a dtype too large has explicitly been given
        # For performance reasons, no check of the data is explicitly performed
        # (It might be OK to change this in the future.)
        self.assertRaises(TypeError, g,
                [3], numpy.array([6], dtype='int16'), 0)

        # Value too big for b, raises TypeError
        self.assertRaises(TypeError, g, [3], [312], 0)

        h = pfunc([a, b, c], (a + b + c))  # Default: allow_input_downcast=None
        # Everything here should behave like with False
        assert numpy.all(h([3], [6], 0) == 9)
        self.assertRaises(TypeError, h,
                [3], numpy.array([6], dtype='int16'), 0)
        self.assertRaises(TypeError, h, [3], [312], 0) 

# 需要導入模塊: from theano import tensor [as 別名]
# 或者: from theano.tensor import bvector [as 別名]
def __init__(self, param_dict):

        self.param_dict = param_dict
        self.training_batch_size = param_dict['training_batch_size']
        nkerns = param_dict['nkerns']
        recept_width = param_dict['recept_width']
        pool_width = param_dict['pool_width']
        stride = param_dict['stride']
        dropout_prob = param_dict['dropout_prob']
        weight_decay = param_dict['l2_reg']
        activation = param_dict['activation']
        weights_variance = param_dict['weights_variance']
        n_channels = param_dict['n_channels']
        n_timesteps = param_dict['n_timesteps']
        n_fbins = param_dict['n_fbins']
        global_pooling = param_dict['global_pooling']
        rng = np.random.RandomState(23455)

        self.training_mode = T.iscalar('training_mode')
        self.x = T.tensor4('x')
        self.y = T.bvector('y')
        self.batch_size = theano.shared(self.training_batch_size)

        self.input = self.x.reshape((self.batch_size, 1, n_channels * n_fbins, n_timesteps))

        self.feature_extractor = FeatureExtractor(rng, self.input, nkerns, recept_width, pool_width, stride,
                                                  self.training_mode,
                                                  dropout_prob[0],
                                                  activation, weights_variance, n_channels, n_timesteps, n_fbins,
                                                  global_pooling)

        self.classifier = SoftmaxLayer(rng=rng, input=self.feature_extractor.output, n_in=nkerns[-1],
                                       training_mode=self.training_mode, dropout_prob=dropout_prob[-1])

        self.weights = self.feature_extractor.weights + self.classifier.weights

        # ---------------------- BACKPROP
        self.cost = self.classifier.cross_entropy_cost(self.y)
        self.cost = self.classifier.cross_entropy_cost(self.y)
        L2_sqr = sum((weight ** 2).sum() for weight in self.weights[::2])
        self.grads = T.grad(self.cost + weight_decay * L2_sqr, self.weights)
        self.updates = self.adadelta_updates(self.grads, self.weights)
        # self.updates = self.nesterov_momentum(self.grads, self.weights)

        # --------------------- FUNCTIONS
        self.train_model = theano.function([self.x, self.y, Param(self.training_mode, default=1)],
                                           outputs=self.cost,
                                           updates=self.updates)

        self.validate_model = theano.function([self.x, self.y, Param(self.training_mode, default=0)],
                                              self.cost)

        self.test_model = theano.function([self.x, Param(self.training_mode, default=0)],
                                          self.classifier.p_y_given_x[:, 1])