Python tensor.specify_shape函数代码示例

def encoder(x, params, config):

    mb_size = config['mb_size']
    num_hidden = config['num_hidden']

    x = T.specify_shape(x, (128, 1, 28, 28))

    #c_1 = ConvPoolLayer(in_length = 4000, batch_size = mb_size, stride = 2, activation = "relu", batch_norm = True, W = params['Wc_enc_1'], b = params['bc_enc_1'])

    #c_2 = ConvPoolLayer(in_length = 399, batch_size = mb_size, stride = 2, activation = "relu", batch_norm = True, W = params['Wc_enc_2'], b = params['bc_enc_2'])

    #c_3 = ConvPoolLayer(in_length = 38, batch_size = mb_size, stride = 2, activation = "relu", batch_norm = True, W = params['Wc_enc_3'], b = params['bc_enc_3'])

    h_out_1 = HiddenLayer(num_in = 784, num_out = num_hidden, W = params['W_enc_1'], b = params['b_enc_1'], activation = 'relu', batch_norm = True)

    h_out_2 = HiddenLayer(num_in = num_hidden, num_out = num_hidden, W = params['W_enc_2'], b = params['b_enc_2'], activation = 'relu', batch_norm = True)

    print "x ndim", x.ndim

    #c_1_value = T.specify_shape(c_1.output(x), (128, 96, 16, 16))
    #c_2_value = c_2.output(c_1_value)
    #c_3_value = c_3.output(c_2_value)

    h_out_1_value = T.specify_shape(h_out_1.output(x.flatten(2)), (128, num_hidden))
    h_out_2_value = h_out_2.output(h_out_1_value)

    return {'h' : h_out_2_value}

        def test_specify_shape_inplace(self):
            # test that specify_shape don't break inserting inplace op

            dtype = self.dtype
            if dtype is None:
                dtype = theano.config.floatX

            rng = numpy.random.RandomState(utt.fetch_seed())
            a = numpy.asarray(rng.uniform(1, 2, [40, 40]), dtype=dtype)
            a = self.cast_value(a)
            a_shared = self.shared_constructor(a)
            b = numpy.asarray(rng.uniform(1, 2, [40, 40]), dtype=dtype)
            b = self.cast_value(b)
            b_shared = self.shared_constructor(b)
            s = numpy.zeros((40, 40), dtype=dtype)
            s = self.cast_value(s)
            s_shared = self.shared_constructor(s)
            f = theano.function([], updates={s_shared: theano.dot(a_shared, b_shared) + s_shared})
            topo = f.maker.env.toposort()
            f()
            # [Gemm{inplace}(<TensorType(float64, matrix)>, 0.01, <TensorType(float64, matrix)>, <TensorType(float64, matrix)>, 2e-06)]
            if theano.config.mode != "FAST_COMPILE":
                assert sum([node.op.__class__.__name__ in ["Gemm", "GpuGemm", "StructuredDot"] for node in topo]) == 1
                assert all(
                    node.op == tensor.blas.gemm_inplace for node in topo if isinstance(node.op, tensor.blas.Gemm)
                )
                assert all(node.op.inplace for node in topo if node.op.__class__.__name__ == "GpuGemm")
            # Their is no inplace gemm for sparse
            # assert all(node.op.inplace for node in topo if node.op.__class__.__name__ == "StructuredDot")
            s_shared_specify = tensor.specify_shape(s_shared, s_shared.get_value(borrow=True).shape)

            # now test with the specify shape op in the output
            f = theano.function(
                [], s_shared.shape, updates={s_shared: theano.dot(a_shared, b_shared) + s_shared_specify}
            )
            topo = f.maker.env.toposort()
            shp = f()
            assert numpy.all(shp == (40, 40))
            if theano.config.mode != "FAST_COMPILE":
                assert sum([node.op.__class__.__name__ in ["Gemm", "GpuGemm", "StructuredDot"] for node in topo]) == 1
                assert all(
                    node.op == tensor.blas.gemm_inplace for node in topo if isinstance(node.op, tensor.blas.Gemm)
                )
                assert all(node.op.inplace for node in topo if node.op.__class__.__name__ == "GpuGemm")
            # now test with the specify shape op in the inputs and outputs
            a_shared = tensor.specify_shape(a_shared, a_shared.get_value(borrow=True).shape)
            b_shared = tensor.specify_shape(b_shared, b_shared.get_value(borrow=True).shape)

            f = theano.function(
                [], s_shared.shape, updates={s_shared: theano.dot(a_shared, b_shared) + s_shared_specify}
            )
            topo = f.maker.env.toposort()
            shp = f()
            assert numpy.all(shp == (40, 40))
            if theano.config.mode != "FAST_COMPILE":
                assert sum([node.op.__class__.__name__ in ["Gemm", "GpuGemm", "StructuredDot"] for node in topo]) == 1
                assert all(
                    node.op == tensor.blas.gemm_inplace for node in topo if isinstance(node.op, tensor.blas.Gemm)
                )
                assert all(node.op.inplace for node in topo if node.op.__class__.__name__ == "GpuGemm")

def bench_deep1000(variant=True):
    name = "mlp_784_1000_1000_1000_10_b" + str(GlobalBenchReporter.batch_size)
    name +=  "_" + config.linker
    w0 = shared(rand(inputs, 1000) * numpy.sqrt(6 / (inputs + 1000)), name='w0')
    b0 = shared(zeros(1000), name='b0')
    w1 = shared(rand(1000, 1000) * numpy.sqrt(6 / (1000 + 1000)), name='w1')
    b1 = shared(zeros(1000), name='b1')
    w2 = shared(rand(1000, 1000) * numpy.sqrt(6 / (1000 + 1000)), name='w2')
    b2 = shared(zeros(1000), name='b2')
    v = shared(zeros(1000, outputs), name='v')
    c = shared(zeros(outputs), name='c')
    if GlobalBenchReporter.batch_size == 1:
        sx_ = sx.flatten()
        sy_ = specify_shape(sy, [1])
        ssx_ = ssx.flatten()
        ssy_ = specify_shape(ssy, [1])
    else:
        sx_ = sx
        sy_ = sy
        ssx_ = ssx
        ssy_ = ssy
    params = [w0, b0, w1, b1, w2, b2, v, c]

    h0 = tanh(dot(sx_, w0) + b0)
    h1 = tanh(dot(h0, w1) + b1)
    h2 = tanh(dot(h1, w2) + b2)

    p_y_given_x = softmax(dot(h2, v) + c)
    nll = -log(p_y_given_x)[arange(sy_.shape[0]), sy_]
    cost = nll.mean()

    gparams = grad(cost, params)

    train = function([si, nsi], cost,
                     updates=[(p, p - lr * gp)
                              for p, gp in zip(params, gparams)],
                     name=name)
    GlobalBenchReporter.eval_model(train, name)
    if not variant:
        return

    # Version with no inputs
    h0 = tanh(dot(ssx_, w0) + b0)
    h1 = tanh(dot(h0, w1) + b1)
    h2 = tanh(dot(h1, w2) + b2)

    p_y_given_x = softmax(dot(h2, v) + c)
    nll = -log(p_y_given_x)[arange(ssy_.shape[0]), ssy_]
    cost = nll.mean()

    gparams = grad(cost, params)

    train2 = function([], cost,
                      updates=[(p, p - lr * gp)
                               for p, gp in zip(params, gparams)] + [(ssi, ssi + snsi)],
                      name=name)
    snsi.set_value(GlobalBenchReporter.batch_size)
    GlobalBenchReporter.bypass_eval_model(train2, name, init_to_zero=ssi)

    def __init__(self, num_hidden, num_features, seq_length, mb_size, tf_states, rf_states):
        
        tf_states = T.specify_shape(tf_states, (seq_length, mb_size, num_features))
        rf_states = T.specify_shape(rf_states, (seq_length, mb_size, num_features))

        hidden_state_features = T.specify_shape(T.concatenate([tf_states, rf_states], axis = 1), (seq_length, mb_size * 2, num_features))

        gru_params_1 = init_tparams(param_init_gru(None, {}, prefix = "gru1", dim = num_hidden, nin = num_features))
        #gru_params_2 = init_tparams(param_init_gru(None, {}, prefix = "gru2", dim = num_hidden, nin = num_hidden + num_features))
        #gru_params_3 = init_tparams(param_init_gru(None, {}, prefix = "gru3", dim = num_hidden, nin = num_hidden + num_features))

        gru_1_out = gru_layer(gru_params_1, hidden_state_features, None, prefix = 'gru1')[0]
        #gru_2_out = gru_layer(gru_params_2, T.concatenate([gru_1_out, hidden_state_features], axis = 2), None, prefix = 'gru2', backwards = True)[0]
        #gru_3_out = gru_layer(gru_params_3, T.concatenate([gru_2_out, hidden_state_features], axis = 2), None, prefix = 'gru3')[0]

        final_out_recc = T.specify_shape(T.mean(gru_1_out, axis = 0), (mb_size * 2, num_hidden))

        h_out_1 = DenseLayer((mb_size * 2, num_hidden), num_units = num_hidden, nonlinearity=lasagne.nonlinearities.rectify)
        #h_out_2 = DenseLayer((mb_size * 2, num_hidden), num_units = num_hidden, nonlinearity=lasagne.nonlinearities.rectify)
        #h_out_3 = DenseLayer((mb_size * 2, num_hidden), num_units = num_hidden, nonlinearity=lasagne.nonlinearities.rectify)
        h_out_4 = DenseLayer((mb_size * 2, num_hidden), num_units = 1, nonlinearity=None)

        h_out_1_value = h_out_1.get_output_for(final_out_recc)
        h_out_4_value = h_out_4.get_output_for(h_out_1_value)

        raw_y = h_out_4_value
        #raw_y = T.clip(h_out_4_value, -10.0, 10.0)
        classification = T.nnet.sigmoid(raw_y)

        #tf comes before rf.  
        p_real =  classification[:mb_size]
        p_gen  = classification[mb_size:]

        #bce = lambda r,t: t * T.nnet.softplus(-r) + (1 - t) * (r + T.nnet.softplus(-r))

        self.d_cost_real = bce(p_real, 0.9 * T.ones(p_real.shape)).mean()
        self.d_cost_gen = bce(p_gen, 0.1 + T.zeros(p_gen.shape)).mean()
        self.g_cost_d = bce(p_gen, 0.9 * T.ones(p_gen.shape)).mean()
        self.d_cost = self.d_cost_real + self.d_cost_gen
        self.g_cost = self.g_cost_d


        self.classification = classification

        self.params = []
        self.params += lasagne.layers.get_all_params(h_out_4,trainable=True)
        #self.params += lasagne.layers.get_all_params(h_out_3,trainable=True)
        #self.params += lasagne.layers.get_all_params(h_out_2,trainable=True)
        self.params += lasagne.layers.get_all_params(h_out_1,trainable=True)

        self.params += gru_params_1.values()
        #self.params += gru_params_2.values()
        #self.params += gru_params_3.values()

        self.accuracy = T.mean(T.eq(T.ones(p_real.shape).flatten(), T.gt(p_real, 0.5).flatten())) + T.mean(T.eq(T.ones(p_gen.shape).flatten(), T.lt(p_gen, 0.5).flatten()))

def bench_mlp_500(variant=True):
    name = "mlp_784_500_10_b" + str(GlobalBenchReporter.batch_size)
    name +=  "_" + config.linker
    HUs = 500
    w = shared(rand(HUs, inputs) * numpy.sqrt(6 / (inputs + HUs)), name='w')
    b = shared(zeros(HUs), name='b')
    v = shared(zeros(outputs, HUs), name='v')
    c = shared(zeros(outputs), name='c')
    if GlobalBenchReporter.batch_size == 1:
        sx_ = sx.flatten()
        sy_ = specify_shape(sy, [1])
        ssx_ = ssx.flatten()
        ssy_ = specify_shape(ssy, [1])
    else:
        sx_ = sx
        sy_ = sy
        ssx_ = ssx
        ssy_ = ssy

    p_y_given_x = softmax(dot(tanh(dot(sx_, w.T) + b), v.T) + c)
    nll = -log(p_y_given_x)[arange(sy_.shape[0]), sy_]
    cost = nll.mean()

    gw, gb, gv, gc = grad(cost, [w, b, v, c])

    train = function([si, nsi], cost,
                     updates={w: w - lr * gw,
                              b: b - lr * gb,
                              v: v - lr * gv,
                              c: c - lr * gc},
                     name=name)
    GlobalBenchReporter.eval_model(train, name)
    if not variant:
        return

    # Version with no inputs
    snsi.set_value(GlobalBenchReporter.batch_size)
    p_y_given_x = softmax(dot(tanh(dot(ssx_, w.T) + b), v.T) + c)
    nll = -log(p_y_given_x)[arange(ssy_.shape[0]), ssy_]
    cost = nll.mean()

    gw, gb, gv, gc = grad(cost, [w, b, v, c])

    train2 = function([], cost,
                     updates={w: w - lr * gw,
                              b: b - lr * gb,
                              v: v - lr * gv,
                              c: c - lr * gc,
                              ssi: ssi + snsi},
                      name=name)
    GlobalBenchReporter.bypass_eval_model(train2, name, init_to_zero=ssi)

def bench_logreg(variant=True):
    name = "mlp_784_10_b" + str(GlobalBenchReporter.batch_size)
    name +=  "_" + config.linker
    v = shared(zeros(outputs, inputs), name='v')
    c = shared(zeros(outputs), name='c')
    if GlobalBenchReporter.batch_size == 1:
        sx_ = sx.flatten()
        sy_ = specify_shape(sy, [1])
        ssx_ = ssx.flatten()
        ssy_ = specify_shape(ssy, [1])
    else:
        sx_ = sx
        sy_ = sy
        ssx_ = ssx
        ssy_ = ssy

    #
    # Note on the transposed-ness of v for some reason, this data
    # layout is faster than the non-transposed orientation.
    # The change doesn't make much difference in the deeper models,
    # but in this case it was more than twice as fast.
    #
    p_y_given_x = softmax(dot(sx_, v.T) + c)
    nll = -log(p_y_given_x)[arange(sy_.shape[0]), sy_]
    cost = nll.mean()

    gv, gc = grad(cost, [v, c])

    #theano.printing.debugprint(grad(cost, [v, c]), file=open('foo', 'wb'))
    train = function([si, nsi], [],
                     updates={v: v - lr * gv, c: c - lr * gc},
                     name=name)
#    theano.printing.debugprint(train, print_type=True)
    GlobalBenchReporter.eval_model(train, name)
    if not variant:
        return

    # Version with no inputs
    snsi.set_value(GlobalBenchReporter.batch_size)

    p_y_given_x = softmax(dot(ssx_, v.T) + c)
    nll = -log(p_y_given_x)[arange(ssy_.shape[0]), ssy_]
    cost = nll.mean()

    gv, gc = grad(cost, [v, c])

    train2 = function([], [],
                      updates={v: v - lr * gv, c: c - lr * gc,
                               ssi: ssi + snsi},
                      name=name)
    GlobalBenchReporter.bypass_eval_model(train2, name, init_to_zero=ssi)

def encoder(x, params, config):

    mb_size = config['mb_size']
    num_hidden = config['num_hidden']

    c_1 = ConvPoolLayer(in_channels = 1, out_channels = 128, in_length = 4000, batch_size = mb_size, kernel_len = 20, stride = 10, activation = "relu", batch_norm = True, W = params['Wc_enc_1'], b = params['bc_enc_1'])

    c_2 = ConvPoolLayer(in_channels = 128, out_channels = 256, in_length = 399, batch_size = mb_size, kernel_len = 20, stride = 10, activation = "relu", batch_norm = True, W = params['Wc_enc_2'], b = params['bc_enc_2'])

    c_3 = ConvPoolLayer(in_channels = 256, out_channels = 512, in_length = 38, batch_size = mb_size, kernel_len = 10, stride = 5, activation = "relu", batch_norm = True, W = params['Wc_enc_3'], b = params['bc_enc_3'])

    h_out_1 = HiddenLayer(num_in = 512 * 6, num_out = num_hidden, W = params['W_enc_1'], b = params['b_enc_1'], activation = 'relu', batch_norm = True)

    h_out_2 = HiddenLayer(num_in = num_hidden, num_out = num_hidden, W = params['W_enc_2'], b = params['b_enc_2'], activation = 'relu', batch_norm = True)

    print "x ndim", x.ndim

    c_1_value = T.specify_shape(c_1.output(x.reshape((128,1,4000))), (128, 128, 399))
    c_2_value = c_2.output(c_1_value)
    c_3_value = c_3.output(c_2_value)

    h_out_1_value = h_out_1.output(c_3_value.flatten(2))
    h_out_2_value = h_out_2.output(h_out_1_value)

    return {'h' : h_out_2_value}

    def output(self, input):

        W_shuffled = self.W.dimshuffle(3, 0, 1, 2)  # c01b to bc01

        print "input ndim", input.ndim

        conv_out = dnn.dnn_conv(img=input,
                                        kerns=W_shuffled,
                                        subsample=(self.stride, self.stride),
                                        border_mode=self.padsize)

        conv_out = conv_out + self.b.dimshuffle('x', 0, 'x', 'x')

        if self.batch_norm:
            conv_out = (conv_out - T.mean(conv_out, axis = (0,2,3), keepdims = True)) / (1.0 + T.std(conv_out, axis=(0,2,3), keepdims = True))
            conv_out = conv_out * T.addbroadcast(self.bn_std,0,2,3) + T.addbroadcast(self.bn_mean, 0,2,3)

        self.out_store = conv_out

        if self.activation == "relu":
            self.out = T.maximum(0.0, conv_out)
        elif self.activation == "tanh":
            self.out = T.tanh(conv_out)
        elif self.activation == None:
            self.out = conv_out


        return T.specify_shape(self.out, (self.batch_size, self.out_channels, self.in_length / self.stride, self.in_length / self.stride))

        def test_specify_shape_partial(self):
            dtype = self.dtype
            if dtype is None:
                dtype = theano.config.floatX

            rng = np.random.RandomState(utt.fetch_seed())
            x1_1 = np.asarray(rng.uniform(1, 2, [4, 2]), dtype=dtype)
            x1_1 = self.cast_value(x1_1)
            x1_2 = np.asarray(rng.uniform(1, 2, [4, 2]), dtype=dtype)
            x1_2 = self.cast_value(x1_2)
            x2 = np.asarray(rng.uniform(1, 2, [5, 2]), dtype=dtype)
            x2 = self.cast_value(x2)

            # Test that we can replace with values of the same shape
            x1_shared = self.shared_constructor(x1_1)
            x1_specify_shape = tensor.specify_shape(x1_shared,
                                                    (tensor.as_tensor_variable(x1_1.shape[0]),
                                                     x1_shared.shape[1]))
            x1_shared.set_value(x1_2)
            assert np.allclose(
                    self.ref_fct(x1_shared.get_value(borrow=True)),
                    self.ref_fct( x1_2))
            shape_op_fct = theano.function([], x1_shared.shape)
            topo = shape_op_fct.maker.fgraph.toposort()
            shape_op_fct()
            if theano.config.mode != 'FAST_COMPILE':
                assert len(topo) == 3
                assert isinstance(topo[0].op, tensor.opt.Shape_i)
                assert isinstance(topo[1].op, tensor.opt.Shape_i)
                assert isinstance(topo[2].op, tensor.opt.MakeVector)

            # Test that we forward the input
            specify_shape_fct = theano.function([], x1_specify_shape)
            specify_shape_fct()
            # theano.printing.debugprint(specify_shape_fct)
            assert np.all(self.ref_fct(specify_shape_fct())
                             == self.ref_fct(x1_2))
            topo_specify = specify_shape_fct.maker.fgraph.toposort()
            if theano.config.mode != 'FAST_COMPILE':
                assert len(topo_specify) == 4

            # Test that we put the shape info into the graph
            shape_constant_fct = theano.function([], x1_specify_shape.shape)
            # theano.printing.debugprint(shape_constant_fct)
            assert np.all(shape_constant_fct() == shape_op_fct())
            topo_cst = shape_constant_fct.maker.fgraph.toposort()
            if theano.config.mode != 'FAST_COMPILE':
                assert len(topo_cst) == 2

            # Test that we can replace with values of the different shape
            # but that will raise an error in some case, but not all
            x1_shared.set_value(x2)
            self.assertRaises(AssertionError, specify_shape_fct)

            # No assertion will be raised as the Op is removed from the graph
            if theano.config.mode not in ['FAST_COMPILE', 'DebugMode', 'DEBUG_MODE']:
                shape_constant_fct()
            else:
                self.assertRaises(AssertionError, shape_constant_fct)

def shapely_tensor( name , x , dtype='float64'):
    '''Return SYMBOLIC tensor with the same dimensions and size as input.'''
    if isinstance(x,type(0)):
        return Th.dscalar(name)
    if isinstance(x,type(numpy.array([]))):
        dtensor_x = Th.TensorType(dtype, (False,)*x.ndim)
        return Th.specify_shape(dtensor_x(name),x.shape)
    raise TypeError('shapely_tensor expects a scalar or numpy ndarray')

    def output(self, x):
        y = T.alloc(0.0, self.output_shape[0], self.output_shape[1], self.output_shape[2])

        y = T.set_subtensor(y[:, :, 0::2], x)
        y = T.set_subtensor(y[:, :, 0::2], x)
        y = T.set_subtensor(y[:, :, 1::2], x)
        y = T.set_subtensor(y[:, :, 1::2], x)

        return T.specify_shape(y, self.output_shape)

def discriminator(x, z, params, mb_size, num_hidden, num_latent):

    import random as rng
    srng = theano.tensor.shared_randomstreams.RandomStreams(420)

    c_1 = ConvPoolLayer(in_channels = 1, out_channels = 128, in_length = 4000, batch_size = mb_size, kernel_len = 20, stride = 10, activation = "relu", batch_norm = False, W = params['W_c_1'], b = params['b_c_1'])

    c_2 = ConvPoolLayer(in_channels = 128, out_channels = 256, in_length = 399, batch_size = mb_size, kernel_len = 20, stride = 10, activation = "relu", batch_norm = False, W = params['W_c_2'], b = params['b_c_2'])

    c_3 = ConvPoolLayer(in_channels = 256, out_channels = 512, in_length = 38, batch_size = mb_size, kernel_len = 10, stride = 5, activation = "relu", batch_norm = False, W = params['W_c_3'], b = params['b_c_3'])

    c_h_1 = HiddenLayer(num_in = 6 * 512, num_out = num_hidden, W = params['W_ch_1'], b = params['b_ch_1'], activation = 'relu', batch_norm = False)

    h_out_1 = HiddenLayer(num_in = num_hidden + num_latent, num_out = num_hidden, activation = 'relu', batch_norm = False, W = params['W_disc_1'], b = params['b_disc_1'])

    h_out_2 = HiddenLayer(num_in = num_hidden, num_out = num_hidden, activation = 'relu', batch_norm = False, W = params['W_disc_2'], b = params['b_disc_2'])

    h_out_3 = HiddenLayer(num_in = num_hidden, num_out = num_hidden, activation = 'relu', batch_norm = False, W = params['W_disc_3'], b = params['b_disc_3'])

    h_out_4 = HiddenLayer(num_in = num_hidden, num_out = 1, activation = None, batch_norm = False, W = params['W_disc_4'], b = params['b_disc_4'])

    c_1_value = T.specify_shape(c_1.output(dropout(x, 0.8).reshape((128,1,4000))), (128,128,399))

    c_2_value = T.specify_shape(c_2.output(c_1_value), (128,256,38))

    c_3_value = T.specify_shape(c_3.output(c_2_value), (128,512,6))

    c_h_1_value = c_h_1.output(c_3_value.flatten(2))

    h_out_1_value = dropout(h_out_1.output(T.concatenate([z, c_h_1_value], axis = 1)))

    h_out_2_value = dropout(h_out_2.output(h_out_1_value), 0.2)

    h_out_3_value = dropout(h_out_3.output(h_out_2_value), 0.2)

    h_out_4_value = h_out_4.output(h_out_3_value)

    raw_y = h_out_4_value

    classification = T.nnet.sigmoid(raw_y)

    results = {'c' : classification}

    return results

    def output(self, input):

        input = T.specify_shape(input, (self.batch_size, self.in_channels, self.in_length))

        conv_out = conv1d_mc0(input, self.W, image_shape = (self.batch_size, self.in_channels, self.in_length),
                                                filter_shape = (self.out_channels, self.in_channels, self.filter_length),
                                                subsample = (self.stride,))

        #was mb, filters, x, y
        #now mb, filters, x

        if self.batch_norm:
            conv_out = (conv_out - T.mean(conv_out, axis = (0,2), keepdims = True)) / (1.0 + T.std(conv_out, axis=(0,2), keepdims = True))

        conv_out += self.b.dimshuffle('x', 0, 'x')

        if self.activation == "relu":
            self.out = T.maximum(0.0, conv_out)
        elif self.activation == "tanh":
            self.out = T.tanh(conv_out)
        elif self.activation == None:
            self.out = conv_out

        return self.out

def get_network(config, params, sequence, do_sample):

    mb_size = config['mb_size']
    seq_length = config['seq_length']
    num_hidden = config['num_hidden']

    sequence_ver = T.specify_shape(sequence * 1.0, (seq_length, mb_size))

    initial_states = theano.shared(np.zeros(shape = (mb_size, 2 * config['num_hidden'])).astype('float32'))
    initial_output = theano.shared(np.zeros(shape = (mb_size,)).astype('float32'))
    initial_loss = theano.shared(np.zeros(shape = (mb_size,)).astype('float32'))

    sequence_features = T.specify_shape(sequence_ver[:-1,:], (seq_length - 1, mb_size))
    sequence_target = T.specify_shape(sequence_ver[1:,:], (seq_length - 1, mb_size))

    use_samples = T.specify_shape(do_sample, (seq_length - 1,))

    results, _ = theano.scan(fn=lambda *inp: rnn_one_step(config, params, *inp), sequences=[sequence_features, sequence_target, use_samples], outputs_info=[initial_states, initial_output, initial_loss],non_sequences=[],n_steps = seq_length - 1)

    results[0] = T.specify_shape(results[0], (seq_length - 1, mb_size, 2 * num_hidden))
    results[1] = T.specify_shape(results[1], (seq_length - 1, mb_size))
    results[2] = T.specify_shape(results[2], (seq_length - 1, mb_size))

    return {'states' : results[0], 'output' : results[1], 'loss' : results[2]}

def local_gpua_specifyShape(node, context_name):
    if isinstance(node.inputs[0].type, GpuArrayType):
        return
    inp = [GpuFromHost(context_name)(node.inputs[0])] + node.inputs[1:]
    return tensor.specify_shape(*inp)