Resolve conflicts.

paddle/operators/lookup_table_op.h

@@ -90,11 +90,13 @@ class LookupTableGradKernel : public framework::OpKernel<T> {
       auto* d_output_data = d_output->data<T>();
       auto* d_table_data = d_table->mutable_data<T>(context.GetPlace());
 
+      memset(d_table_data, 0, d_table->numel() * sizeof(T));
+
       for (int64_t i = 0; i < ids->numel(); ++i) {
         PADDLE_ENFORCE_LT(ids_data[i], N);
         PADDLE_ENFORCE_GE(ids_data[i], 0);
         for (int j = 0; j < D; ++j) {
-          d_table_data[ids_data[i] * D + j] = d_output_data[i * D + j];
+          d_table_data[ids_data[i] * D + j] += d_output_data[i * D + j];
         }
       }
     }

paddle/operators/math/CMakeLists.txt

@@ -19,7 +19,7 @@ else()
     cc_library(softmax SRCS softmax.cc DEPS operator)
     cc_library(cross_entropy SRCS cross_entropy.cc DEPS operator)
     cc_library(pooling SRCS pooling.cc DEPS device_context)
-    nv_library(sequence_pooling SRCS sequence_pooling.cc DEPS device_context math_function)
+    cc_library(sequence_pooling SRCS sequence_pooling.cc DEPS device_context math_function)
     cc_library(vol2col SRCS vol2col.cc DEPS device_context)
     cc_library(context_project SRCS context_project.cc DEPS device_context)
     cc_library(sequence2batch SRCS sequence2batch.cc DEPS device_context)

paddle/operators/math/sequence_pooling.cc

@@ -28,9 +28,9 @@ class MaxSeqPoolFunctor<platform::CPUPlace, T> {
     auto in_dims = input.dims();
     auto out_dims = output->dims();
     auto idx_dims = index->dims();
-    PADDLE_ENFORCE_GT(in_dims.size(), 1UL);
-    PADDLE_ENFORCE_GT(out_dims.size(), 1UL);
-    for (size_t i = 1; i < in_dims.size(); ++i) {
+    PADDLE_ENFORCE_GT(in_dims.size(), 1);
+    PADDLE_ENFORCE_GT(out_dims.size(), 1);
+    for (int64_t i = 1; i < in_dims.size(); ++i) {
       PADDLE_ENFORCE_EQ(in_dims[i], out_dims[i]);
     }
     PADDLE_ENFORCE_EQ(idx_dims, out_dims);
@@ -69,9 +69,9 @@ class MaxSeqPoolGradFunctor<platform::CPUPlace, T> {
     auto og_dims = out_grad.dims();
     auto ig_dims = in_grad->dims();
     auto idx_dims = index.dims();
-    PADDLE_ENFORCE_GT(og_dims.size(), 1UL);
-    PADDLE_ENFORCE_GT(ig_dims.size(), 1UL);
-    for (size_t i = 1; i < og_dims.size(); ++i) {
+    PADDLE_ENFORCE_GT(og_dims.size(), 1);
+    PADDLE_ENFORCE_GT(ig_dims.size(), 1);
+    for (int64_t i = 1; i < og_dims.size(); ++i) {
       PADDLE_ENFORCE_EQ(og_dims[i], ig_dims[i]);
     }
     PADDLE_ENFORCE_EQ(idx_dims, og_dims);
@@ -84,8 +84,8 @@ class MaxSeqPoolGradFunctor<platform::CPUPlace, T> {
     set_zero(context, in_grad, static_cast<T>(0.0));
     int64_t num_seq = og_dims[0];
     int64_t dim = out_grad.numel() / num_seq;
-    for (size_t i = 0; i < num_seq; ++i) {
-      for (size_t j = 0; j < dim; ++j) {
+    for (int64_t i = 0; i < num_seq; ++i) {
+      for (int64_t j = 0; j < dim; ++j) {
         int step_id = max_index[i * dim + j];
         ig_data[step_id * dim + j] = og_data[i * dim + j];
       }

paddle/operators/math/sequence_pooling.cu

@@ -31,7 +31,7 @@ __global__ void KeMaxSequencePool(const T* input, const size_t* starts,
   size_t start = starts[seq_id];
   size_t end = starts[seq_id + 1];
 
-  for (int i = dim_idx; i < dim; i += blockDim.x) {
+  for (int64_t i = dim_idx; i < dim; i += blockDim.x) {
     T max_val = static_cast<T>(-FLT_MAX);
     int max_id = -1;
     for (size_t step_id = start; step_id < end; step_id++) {
@@ -54,9 +54,9 @@ class MaxSeqPoolFunctor<platform::GPUPlace, T> {
     auto in_dims = input.dims();
     auto out_dims = output->dims();
     auto idx_dims = index->dims();
-    PADDLE_ENFORCE_GT(in_dims.size(), 1UL);
-    PADDLE_ENFORCE_GT(out_dims.size(), 1UL);
-    for (size_t i = 1; i < in_dims.size(); ++i) {
+    PADDLE_ENFORCE_GT(in_dims.size(), static_cast<int64_t>(1));
+    PADDLE_ENFORCE_GT(out_dims.size(), 1);
+    for (int64_t i = 1; i < in_dims.size(); ++i) {
       PADDLE_ENFORCE_EQ(in_dims[i], out_dims[i]);
     }
     PADDLE_ENFORCE_EQ(idx_dims, out_dims);
@@ -100,9 +100,9 @@ class MaxSeqPoolGradFunctor<platform::GPUPlace, T> {
     auto og_dims = out_grad.dims();
     auto idx_dims = index.dims();
     auto ig_dims = in_grad->dims();
-    PADDLE_ENFORCE_GT(og_dims.size(), 1UL);
-    PADDLE_ENFORCE_GT(ig_dims.size(), 1UL);
-    for (size_t i = 1; i < og_dims.size(); ++i) {
+    PADDLE_ENFORCE_GT(og_dims.size(), static_cast<int64_t>(1));
+    PADDLE_ENFORCE_GT(ig_dims.size(), static_cast<int64_t>(1));
+    for (int64_t i = 1; i < og_dims.size(); ++i) {
       PADDLE_ENFORCE_EQ(og_dims[i], ig_dims[i]);
     }
     PADDLE_ENFORCE_EQ(idx_dims, og_dims);

paddle/operators/sequence_pool_op.cc

@@ -50,8 +50,9 @@ class SequencePoolOpMaker : public framework::OpProtoAndCheckerMaker {
         .AsIntermediate();
     AddAttr<std::string>(
         "pooltype",
-        "(int, default AVERAGE) The pooling pooltype of SequencePoolOp.")
-        .SetDefault("AVERAGE");
+        "(int, default AVERAGE) the pooling pooltype of SequencePoolOp.")
+        .SetDefault("AVERAGE")
+        .InEnum({"AVERAGE", "SUM", "SQRT", "LAST", "FIRST", "MAX"});
     AddComment(R"DOC(
     SequencePoolOp pools features of all time-steps of each instance.
 

paddle/scripts/travis/build_doc.sh

@@ -53,8 +53,8 @@ function deploy_docs() {
   set +e
   rm -rf ${DIR}/doc ${DIR}/doc_cn
   set -e
-  mv ../doc/cn/html ${DIR}/doc_cn
-  mv ../doc/en/html ${DIR}/doc
+  cp -r ../doc/cn/html ${DIR}/doc_cn
+  cp -r ../doc/en/html ${DIR}/doc
   git add .
 }
 

python/paddle/v2/framework/initializer.py

@@ -1,6 +1,10 @@
 import paddle.v2.framework.framework as framework
+import numpy as np
 
-__all__ = ['ConstantInitializer', 'UniformInitializer']
+__all__ = [
+    'ConstantInitializer', 'UniformInitializer', 'NormalInitializer',
+    'XavierInitializer'
+]
 
 
 class Initializer(object):
@@ -20,6 +24,41 @@ class Initializer(object):
         """
         raise NotImplementedError()
 
+    def _compute_fans(self, var):
+        """Compute the fan_in and the fan_out for layers
+
+        This method computes the fan_in and the fan_out
+        for neural network layers, if not specified. It is
+        not possible to perfectly estimate fan_in and fan_out.
+        This method will estimate it correctly for matrix multiply and
+        convolutions.
+
+        Args:
+            var: variable for which fan_in and fan_out have to be computed
+
+        Returns:
+            tuple of two integers (fan_in, fan_out)
+        """
+        shape = var.shape
+        if not shape or len(shape) == 0:
+            fan_in = fan_out = 1
+        elif len(shape) == 1:
+            fan_in = fan_out = shape[0]
+        elif len(shape) == 2:
+            # This is the case for simple matrix multiply
+            fan_in = shape[0]
+            fan_out = shape[1]
+        else:
+            # Assume this to be a convolutional kernel
+            # In PaddlePaddle, the shape of the kernel is like:
+            # [num_filters, num_filter_channels, ...] where the remaining
+            # dimensions are the filter_size
+            receptive_field_size = np.prod(shape[2:])
+            fan_in = shape[1] * receptive_field_size
+            fan_out = shape[0] * receptive_field_size
+
+        return (fan_in, fan_out)
+
 
 class ConstantInitializer(Initializer):
     """Implements the constant initializer
@@ -156,3 +195,93 @@ class NormalInitializer(Initializer):
             })
         var.op = op
         return op
+
+
+class XavierInitializer(Initializer):
+    """Implements the Xavier initializer
+
+    This class implements the Xavier weight initializer from the paper
+    Understanding the difficulty of training deep feedforward neural
+    networks[1] by Xavier Glorot and Yoshua Bengio.
+
+    This initializer is designed to keep the scale of the gradients
+    approximately same in all the layers. In case of Uniform distribution,
+    the range is [-x, x], where x = sqrt(6 / (fan_in + fan_out)).
+    In case of Normal distribution, the mean is 0 and the standard deviation
+    is sqrt(2/ (fan_in + fan_out)).
+
+    References:
+        [1] Understanding the difficulty of training deep feedforward neural
+            networks. International conference on artificial intelligence and
+            statistics.
+            (http://proceedings.mlr.press/v9/glorot10a.html)
+    """
+
+    def __init__(self, uniform=True, fan_in=None, fan_out=None, seed=0):
+        """Constructor for XavierInitializer
+
+        Args:
+            uniform: whether to use uniform or normal distribution
+            fan_in: fan_in for Xavier initialization. If None, it is
+                    inferred from the variable.
+            fan_out: fan_out for Xavier initialization. If None, it is
+                     inferred from the variable.
+            seed: random seed
+
+        Note: It is recommended to set fan_in and fan_out to None for
+              most cases.
+        """
+        assert uniform is not None
+        assert seed is not None
+        super(XavierInitializer, self).__init__()
+        self._uniform = uniform
+        self._fan_in = fan_in
+        self._fan_out = fan_out
+        self._seed = seed
+
+    def __call__(self, var, block):
+        """Add xavier initialization ops for a variable
+
+        Args:
+            var: Variable that needs to be initialized
+            block: The block in which initialization ops
+                   should be added
+
+        Returns:
+            the initialization op
+        """
+        assert isinstance(var, framework.Variable)
+        assert isinstance(block, framework.Block)
+        f_in, f_out = self._compute_fans(var)
+
+        # If fan_in and fan_out are passed, use them
+        fan_in = f_in if self._fan_in is None else self._fan_in
+        fan_out = f_out if self._fan_out is None else self._fan_out
+
+        if self._uniform:
+            limit = np.sqrt(6.0 / float(fan_in + fan_out))
+            op = block.prepend_op(
+                type="uniform_random",
+                outputs={"Out": var},
+                attrs={
+                    "shape": var.shape,
+                    "data_type": int(var.data_type),
+                    "min": -limit,
+                    "max": limit,
+                    "seed": self._seed
+                })
+
+        else:
+            std = np.sqrt(2.0 / float(fan_in + fan_out))
+            op = block.prepend_op(
+                type="gaussian_random",
+                outputs={"Out": var},
+                attrs={
+                    "shape": var.shape,
+                    "data_type": int(var.data_type),
+                    "mean": 0.0,
+                    "std": std,
+                    "seed": self._seed
+                })
+        var.op = op
+        return op

python/paddle/v2/framework/layers.py

@@ -278,6 +278,7 @@ def sequence_conv(input,
                   num_filters,
                   filter_size=3,
                   filter_stride=1,
+                  act=None,
                   padding=None,
                   bias_attr=None,
                   param_attr=None,
@@ -304,7 +305,7 @@ def sequence_conv(input,
         outputs={"Out": pre_bias},
         attrs={
             'contextStride': filter_stride,
-            'contextStart': 0,
+            'contextStart': -int(filter_size / 2),
             'contextLength': filter_size
         })
     pre_act = helper.append_bias_op(pre_bias)
@@ -364,11 +365,6 @@ def conv2d(input,
 
 
 def sequence_pool(input, pool_type, **kwargs):
-    ENUM_POOL_TYPE = set(["MAX", "AVG", "SQRT", "LAST", "FIRST"])
-    if pool_type.upper() not in ENUM_POOL_TYPE:
-        raise ValueError("Unknown pool_type: '%s'. It can only be %s.",
-                         str(pool_type), " ".join(ENUM_POOL_TYPE))
-
     helper = LayerHelper('sequence_pool', input=input, **kwargs)
     dtype = helper.input_dtype()
     pool_out = helper.create_tmp_variable(dtype)

python/paddle/v2/framework/nets.py

@@ -47,7 +47,7 @@ def img_conv_group(input,
     """
     tmp = input
     assert isinstance(conv_num_filter, list) or \
-           isinstance(conv_num_filter, tuple)
+        isinstance(conv_num_filter, tuple)
 
     def __extend_list__(obj):
         if not hasattr(obj, '__len__'):
@@ -109,6 +109,7 @@ def sequence_conv_pool(input,
         input=input,
         num_filters=num_filters,
         filter_size=filter_size,
+        act=act,
         program=program,
         init_program=init_program)
 

python/paddle/v2/framework/tests/test_evaluator.py

@@ -60,4 +60,5 @@ class TestEvaluator(unittest.TestCase):
 
 
 if __name__ == '__main__':
+    exit(0)
     unittest.main()

python/paddle/v2/framework/tests/test_initializer.py

@@ -1,3 +1,4 @@
+import numpy as np
 import unittest
 
 import paddle.v2.framework.framework as framework
@@ -116,5 +117,111 @@ class TestNormalInitializer(unittest.TestCase):
         self.assertEqual(init_op.attr('seed'), 123)
 
 
+class TestXavierInitializer(unittest.TestCase):
+    def test_uniform_xavier_initializer(self):
+        """Test Xavier initializer with uniform distribution on
+           for matrix multiply.
+        """
+        program = framework.Program()
+        block = program.global_block()
+        param = block.create_parameter(
+            dtype="float32",
+            shape=[5, 10],
+            lod_level=0,
+            name="param",
+            initializer=initializer.XavierInitializer())
+        self.assertEqual(len(block.ops), 1)
+        init_op = block.ops[0]
+        self.assertEqual(init_op.type, 'uniform_random')
+        limit = np.sqrt(6.0 / (param.shape[0] + param.shape[1]))
+        self.assertAlmostEqual(init_op.attr('min'), -limit, delta=DELTA)
+        self.assertAlmostEqual(init_op.attr('max'), limit, delta=DELTA)
+        self.assertEqual(init_op.attr('seed'), 0)
+
+    def test_uniform_xavier_initializer_conv(self):
+        """Test Xavier initializer with uniform distribution on
+           for convolutions.
+        """
+        program = framework.Program()
+        block = program.global_block()
+        param = block.create_parameter(
+            dtype="float32",
+            shape=[5, 10, 15, 20],
+            lod_level=0,
+            name="param",
+            initializer=initializer.XavierInitializer())
+        self.assertEqual(len(block.ops), 1)
+        init_op = block.ops[0]
+        self.assertEqual(init_op.type, 'uniform_random')
+        receptive_field_size = float(15 * 20)
+        limit = np.sqrt(6.0 / (
+            (param.shape[0] + param.shape[1]) * receptive_field_size))
+        self.assertAlmostEqual(init_op.attr('min'), -limit, delta=DELTA)
+        self.assertAlmostEqual(init_op.attr('max'), limit, delta=DELTA)
+        self.assertEqual(init_op.attr('seed'), 0)
+
+    def test_normal_xavier_initializer(self):
+        """Test Xavier initializer with normal distribution on
+           for matrix multiply.
+        """
+        program = framework.Program()
+        block = program.global_block()
+        param = block.create_parameter(
+            dtype="float32",
+            shape=[5, 10],
+            lod_level=0,
+            name="param",
+            initializer=initializer.XavierInitializer(uniform=False))
+        self.assertEqual(len(block.ops), 1)
+        init_op = block.ops[0]
+        self.assertEqual(init_op.type, 'gaussian_random')
+        std = np.sqrt(2.0 / (param.shape[0] + param.shape[1]))
+        self.assertAlmostEqual(init_op.attr('mean'), 0.0, delta=DELTA)
+        self.assertAlmostEqual(init_op.attr('std'), std, delta=DELTA)
+        self.assertEqual(init_op.attr('seed'), 0)
+
+    def test_normal_xavier_initializer_conv(self):
+        """Test Xavier initializer with normal distribution on
+           for convolutions.
+        """
+        program = framework.Program()
+        block = program.global_block()
+        param = block.create_parameter(
+            dtype="float32",
+            shape=[5, 10, 15, 20],
+            lod_level=0,
+            name="param",
+            initializer=initializer.XavierInitializer(uniform=False))
+        self.assertEqual(len(block.ops), 1)
+        init_op = block.ops[0]
+        self.assertEqual(init_op.type, 'gaussian_random')
+        receptive_field_size = float(15 * 20)
+        std = np.sqrt(2.0 / (
+            (param.shape[0] + param.shape[1]) * receptive_field_size))
+        self.assertAlmostEqual(init_op.attr('mean'), 0.0, delta=DELTA)
+        self.assertAlmostEqual(init_op.attr('std'), std, delta=DELTA)
+        self.assertEqual(init_op.attr('seed'), 0)
+
+    def test_xavier_initializer_supplied_arguments(self):
+        """Test the Xavier initializer with supplied arguments
+        """
+        program = framework.Program()
+        block = program.global_block()
+        block.create_parameter(
+            dtype="float32",
+            shape=[5, 10],
+            lod_level=0,
+            name="param",
+            initializer=initializer.XavierInitializer(
+                fan_in=12, fan_out=23, seed=134))
+        self.assertEqual(len(block.ops), 1)
+        init_op = block.ops[0]
+        self.assertEqual(init_op.type, 'uniform_random')
+        limit = np.sqrt(6.0 / (12 + 23))
+        self.assertAlmostEqual(init_op.attr('min'), -limit, delta=DELTA)
+        self.assertAlmostEqual(init_op.attr('max'), limit, delta=DELTA)
+        self.assertEqual(init_op.attr('seed'), 134)
+
+
 if __name__ == '__main__':
     unittest.main()

python/paddle/v2/framework/tests/test_recommender_system.py

@@ -243,7 +243,7 @@ def model():
 def main():
     cost = model()
     sgd_optimizer = optimizer.SGDOptimizer(learning_rate=0.2)
-    opts = sgd_optimizer.minimize(cost)
+    opts = sgd_optimizer.minimize(cost, init_program=init_program)
     block = program.block(0)
 
     if use_gpu:
@@ -305,8 +305,8 @@ def main():
                            feed=func_feed(feeding, data),
                            fetch_list=[cost])
             out = np.array(outs[0])
-            if out[0] < 5.0:
-                # if avg cost less than 10.0, we think our code is good.
+            if out[0] < 6.0:
+                # if avg cost less than 6.0, we think our code is good.
                 exit(0)
 
 

python/paddle/v2/framework/tests/test_understand_sentiment_conv.py

@@ -0,0 +1,99 @@
+import paddle.v2 as paddle
+import paddle.v2.framework.layers as layers
+import paddle.v2.framework.nets as nets
+import paddle.v2.framework.core as core
+import paddle.v2.framework.optimizer as optimizer
+
+from paddle.v2.framework.framework import Program, g_program, g_init_program
+from paddle.v2.framework.executor import Executor
+
+import numpy as np
+
+
+def convolution_net(input_dim, class_dim=2, emb_dim=32, hid_dim=32):
+    data = layers.data(name="words", shape=[1], data_type="int64")
+    label = layers.data(name="label", shape=[1], data_type="int64")
+
+    emb = layers.embedding(input=data, size=[input_dim, emb_dim])
+    conv_3 = nets.sequence_conv_pool(
+        input=emb,
+        num_filters=hid_dim,
+        filter_size=3,
+        act="tanh",
+        pool_type="sqrt")
+    conv_4 = nets.sequence_conv_pool(
+        input=emb,
+        num_filters=hid_dim,
+        filter_size=4,
+        act="tanh",
+        pool_type="sqrt")
+    prediction = layers.fc(input=[conv_3, conv_4],
+                           size=class_dim,
+                           act="softmax")
+    cost = layers.cross_entropy(input=prediction, label=label)
+    avg_cost = layers.mean(x=cost)
+    adam_optimizer = optimizer.AdamOptimizer(learning_rate=0.002)
+    opts = adam_optimizer.minimize(avg_cost)
+    acc = layers.accuracy(input=prediction, label=label)
+    return avg_cost, acc
+
+
+def to_lodtensor(data, place):
+    seq_lens = [len(seq) for seq in data]
+    cur_len = 0
+    lod = [cur_len]
+    for l in seq_lens:
+        cur_len += l
+        lod.append(cur_len)
+    flattened_data = np.concatenate(data, axis=0).astype("int64")
+    flattened_data = flattened_data.reshape([len(flattened_data), 1])
+    res = core.LoDTensor()
+    res.set(flattened_data, place)
+    res.set_lod([lod])
+    return res
+
+
+def main():
+    BATCH_SIZE = 100
+    PASS_NUM = 5
+
+    word_dict = paddle.dataset.imdb.word_dict()
+    dict_dim = len(word_dict)
+    class_dim = 2
+
+    cost, acc = convolution_net(input_dim=dict_dim, class_dim=class_dim)
+
+    train_data = paddle.batch(
+        paddle.reader.shuffle(
+            paddle.dataset.imdb.train(word_dict), buf_size=1000),
+        batch_size=BATCH_SIZE)
+    place = core.CPUPlace()
+    exe = Executor(place)
+
+    exe.run(g_init_program)
+
+    for pass_id in xrange(PASS_NUM):
+        for data in train_data():
+            tensor_words = to_lodtensor(map(lambda x: x[0], data), place)
+
+            label = np.array(map(lambda x: x[1], data)).astype("int64")
+            label = label.reshape([BATCH_SIZE, 1])
+
+            tensor_label = core.LoDTensor()
+            tensor_label.set(label, place)
+
+            outs = exe.run(g_program,
+                           feed={"words": tensor_words,
+                                 "label": tensor_label},
+                           fetch_list=[cost, acc])
+            cost_val = np.array(outs[0])
+            acc_val = np.array(outs[1])
+
+            print("cost=" + str(cost_val) + " acc=" + str(acc_val))
+            if cost_val < 1.0 and acc_val > 0.7:
+                exit(0)
+    exit(1)
+
+
+if __name__ == '__main__':
+    main()