Merge pull request #7726 from lcy-seso/fix_rendering_error_of_transpose_op

fix rendering error of transpose operator and add wrapper.

paddle/operators/transpose_op.cc

@@ -59,44 +59,39 @@ class TransposeOpMaker : public framework::OpProtoAndCheckerMaker {
       : OpProtoAndCheckerMaker(proto, op_checker) {
     AddInput(
         "X",
-        "(Tensor)The input tensor, tensors with rank at most 6 are supported");
-    AddOutput("Out", "(Tensor)The output tensor");
+        "(Tensor) The input tensor, tensors with rank up to 6 are supported.");
+    AddOutput("Out", "(Tensor)The output tensor.");
     AddAttr<std::vector<int>>(
         "axis",
-        "(vector<int>)A list of values, and the size of the list should be "
-        "the same with the input tensor rank, the tensor will "
-        "permute the axes according the the values given");
+        "(vector<int>) A list of values, and the size of the list should be "
+        "the same with the input tensor rank. This operator permutes the input "
+        "tensor's axes according to the values given.");
     AddComment(R"DOC(
 Transpose Operator.
 
-The input tensor will be permuted according to the axis values given.
-The op functions is similar to how numpy.transpose works in python.
+The input tensor will be permuted according to the axes given.
+The behavior of this operator is similar to how `numpy.transpose` works.
 
-For example:
+- suppose the input `X` is a 2-D tensor:
+    $$
+    X = \begin{pmatrix}
+    0 &1 &2 \\
+    3 &4 &5
+    \end{pmatrix}$$
 
-    .. code-block:: text
+    the given `axes` is: $[1, 0]$, and $Y$ = transpose($X$, axis)
 
-      input = numpy.arange(6).reshape((2,3))
+    then the output $Y$ is:
 
-      the input is:
+    $$
+    Y = \begin{pmatrix}
+         0 &3 \\
+         1 &4  \\
+         2 &5
+    \end{pmatrix}$$
 
-      array([[0, 1, 2],
-             [3, 4, 5]])
-
-      given axis is:
-
-      [1, 0]
-
-      output = input.transpose(axis)
-
-      then the output is:
-
-      array([[0, 3],
-             [1, 4],
-             [2, 5]])
-
-So, given a input tensor of shape(N, C, H, W) and the axis is {0, 2, 3, 1},
-the output tensor shape will be (N, H, W, C)
+- Given a input tensor with shape $(N, C, H, W)$ and the `axes` is 
+$[0, 2, 3, 1]$, then shape of the output tensor will be: $(N, H, W, C)$.
 
 )DOC");
   }

python/paddle/v2/dataset/wmt16.py

@@ -171,8 +171,9 @@ def train(src_dict_size, trg_dict_size, src_lang="en"):
         callable: The train reader.
     """
 
-    assert (src_lang in ["en", "de"], ("An error language type.  Only support: "
-                                       "en (for English); de(for Germany)"))
+    if src_lang not in ["en", "de"]:
+        raise ValueError("An error language type.  Only support: "
+                         "en (for English); de(for Germany).")
     src_dict_size, trg_dict_size = __get_dict_size(src_dict_size, trg_dict_size,
                                                    src_lang)
 
@@ -218,9 +219,9 @@ def test(src_dict_size, trg_dict_size, src_lang="en"):
         callable: The test reader.
     """
 
-    assert (src_lang in ["en", "de"],
-            ("An error language type.  "
-             "Only support: en (for English); de(for Germany)"))
+    if src_lang not in ["en", "de"]:
+        raise ValueError("An error language type. "
+                         "Only support: en (for English); de(for Germany).")
 
     src_dict_size, trg_dict_size = __get_dict_size(src_dict_size, trg_dict_size,
                                                    src_lang)
@@ -266,9 +267,9 @@ def validation(src_dict_size, trg_dict_size, src_lang="en"):
     Returns:
         callable: The validation reader.
     """
-    assert (src_lang in ["en", "de"],
-            ("An error language type.  "
-             "Only support: en (for English); de(for Germany)"))
+    if src_lang not in ["en", "de"]:
+        raise ValueError("An error language type. "
+                         "Only support: en (for English); de(for Germany).")
     src_dict_size, trg_dict_size = __get_dict_size(src_dict_size, trg_dict_size,
                                                    src_lang)
 

python/paddle/v2/fluid/layers/nn.py

@@ -22,14 +22,41 @@ from ..param_attr import ParamAttr
 from tensor import concat
 
 __all__ = [
-    'fc', 'embedding', 'dynamic_lstm', 'gru_unit', 'linear_chain_crf',
-    'crf_decoding', 'cos_sim', 'cross_entropy', 'square_error_cost', 'accuracy',
-    'chunk_eval', 'sequence_conv', 'conv2d', 'sequence_pool', 'pool2d',
-    'batch_norm', 'beam_search_decode', 'conv2d_transpose', 'sequence_expand',
-    'lstm_unit', 'reduce_sum', 'reduce_mean', 'reduce_max', 'reduce_min',
-    'sequence_first_step', 'sequence_last_step', 'dropout', 'split',
-    'ctc_greedy_decoder', 'edit_distance', 'l2_normalize', 'matmul', 'warpctc',
-    'sequence_reshape'
+    'fc',
+    'embedding',
+    'dynamic_lstm',
+    'gru_unit',
+    'linear_chain_crf',
+    'crf_decoding',
+    'cos_sim',
+    'cross_entropy',
+    'square_error_cost',
+    'accuracy',
+    'chunk_eval',
+    'sequence_conv',
+    'conv2d',
+    'sequence_pool',
+    'pool2d',
+    'batch_norm',
+    'beam_search_decode',
+    'conv2d_transpose',
+    'sequence_expand',
+    'lstm_unit',
+    'reduce_sum',
+    'reduce_mean',
+    'reduce_max',
+    'reduce_min',
+    'sequence_first_step',
+    'sequence_last_step',
+    'dropout',
+    'split',
+    'ctc_greedy_decoder',
+    'edit_distance',
+    'l2_normalize',
+    'matmul',
+    'warpctc',
+    'sequence_reshape',
+    'transpose',
 ]
 
 
@@ -44,14 +71,14 @@ def fc(input,
     **Fully Connected Layer**
 
     The fully connected layer can take multiple tensors as its inputs. It
-    creates a variable (one for each input tensor) called weights for each input
-    tensor, which represents a fully connected weight matrix from each input
-    unit to each output unit. The fully connected layer multiplies each input
-    tensor with its coresponding weight to produce an output Tensor. If
-    multiple input tensors are given, the results of multiple multiplications
-    will be sumed up. If bias_attr is not None, a biases variable will be
-    created and added to the output. Finally, if activation is not None,
-    it will be applied to the output as well.
+    creates a variable (one for each input tensor) called weights for each
+    input tensor, which represents a fully connected weight matrix from
+    each input unit to each output unit. The fully connected layer
+    multiplies each input tensor with its coresponding weight to produce
+    an output Tensor. If multiple input tensors are given, the results of
+    multiple multiplications will be sumed up. If bias_attr is not None,
+    a biases variable will be created and added to the output. Finally,
+    if activation is not None, it will be applied to the output as well.
 
     This process can be formulated as follows:
 
@@ -2112,3 +2139,41 @@ def sequence_reshape(input, new_dim):
         outputs={'Out': [out]},
         attrs={'new_dim': new_dim})
     return out
+
+
+def transpose(x, perm, name=None):
+    """
+    **transpose Layer**
+
+    Permute the dimensions of `input` according to `perm`.
+
+    The `i`-th dimension  of the returned tensor will correspond to the
+    perm[i]-th dimension of `input`.
+
+    Args:
+       input (Variable): (Tensor), A Tensor.
+       perm (list): A permutation of the dimensions of `input`.
+
+    Returns:
+        Variable: A transposed Tensor.
+
+    Examples:
+        .. code-block:: python
+
+            x = fluid.layers.data(name='x', shape=[5, 10, 15], dtype='float32')
+            x_transposed = layers.transpose(x, perm=[1, 0, 2])
+    """
+
+    if len(perm) != len(x.shape):
+        raise ValueError(
+            "Input(perm) is the permutation of dimensions of Input(input). "
+            "It's length shoud be equal to Input(input)'s rank.")
+
+    helper = LayerHelper('transpose', **locals())
+    out = helper.create_tmp_variable(x.dtype)
+    helper.append_op(
+        type='transpose',
+        inputs={'X': [x]},
+        outputs={'Out': [out]},
+        attrs={'axis': perm})
+    return out

python/paddle/v2/fluid/layers/ops.py

@@ -45,10 +45,20 @@ __activations__ = [
 ]
 
 __all__ = [
-    'mean', 'mul', 'reshape', 'scale', 'transpose',
-    'sigmoid_cross_entropy_with_logits', 'elementwise_add', 'elementwise_div',
-    'elementwise_sub', 'elementwise_mul', 'elementwise_max', 'elementwise_min',
-    'clip', 'clip_by_norm', 'sequence_softmax'
+    'mean',
+    'mul',
+    'reshape',
+    'scale',
+    'sigmoid_cross_entropy_with_logits',
+    'elementwise_add',
+    'elementwise_div',
+    'elementwise_sub',
+    'elementwise_mul',
+    'elementwise_max',
+    'elementwise_min',
+    'clip',
+    'clip_by_norm',
+    'sequence_softmax',
 ] + __activations__
 
 for _OP in set(__all__):

python/paddle/v2/fluid/tests/book/test_understand_sentiment_lstm.py

@@ -65,13 +65,13 @@ def lstm_net(dict_dim, class_dim=2, emb_dim=32, seq_len=80, batch_size=50):
 
     emb = fluid.layers.embedding(input=data, size=[dict_dim, emb_dim])
     emb = fluid.layers.reshape(x=emb, shape=[batch_size, seq_len, emb_dim])
-    emb = fluid.layers.transpose(x=emb, axis=[1, 0, 2])
+    emb = fluid.layers.transpose(x=emb, perm=[1, 0, 2])
 
     c_pre_init = fluid.layers.fill_constant(
         dtype=emb.dtype, shape=[batch_size, emb_dim], value=0.0)
     c_pre_init.stop_gradient = False
     layer_1_out = lstm(emb, c_pre_init=c_pre_init, hidden_dim=emb_dim)
-    layer_1_out = fluid.layers.transpose(x=layer_1_out, axis=[1, 0, 2])
+    layer_1_out = fluid.layers.transpose(x=layer_1_out, perm=[1, 0, 2])
 
     prediction = fluid.layers.fc(input=layer_1_out,
                                  size=class_dim,