Complete unittest for trainer_config_helpers. (#108)

* Fix lots of trainer_config_helpers bug, and complete unittest for `layers.py`

python/paddle/trainer/config_parser.py

@@ -1279,7 +1279,7 @@ class LayerBase(object):
             size,
             dims=None,
             sparse = None,
-            format = "csr"):
+            format = None):
         if dims is None:
             # TODO(yuyang18): print warning and callstack here!
             dims = list()
@@ -2074,7 +2074,7 @@ class MaxLayer(LayerBase):
             active_type='linear',
             device=None,
             bias=False,
-            output_max_index=False):
+            output_max_index=None):
         super(MaxLayer, self).__init__(name, 'max', 0, inputs=inputs, device=device)
         config_assert(len(self.inputs) == 1, 'MaxLayer must have 1 input')
         self.config.trans_type =  trans_type
@@ -2083,7 +2083,8 @@ class MaxLayer(LayerBase):
             input_layer = self.get_input_layer(input_index)
             self.set_layer_size(input_layer.size)
         self.create_bias_parameter(bias, self.config.size)
-        self.config.output_max_index=output_max_index
+        if output_max_index is not None:
+            self.config.output_max_index = output_max_index
 
 
 @config_layer('maxid')
@@ -2440,7 +2441,7 @@ class MixedLayer(LayerBase):
             inputs,
             size=0,
             bias=True,
-            error_clipping_threshold=0.0,
+            error_clipping_threshold=None,
             **xargs):
         config_assert(inputs, 'inputs cannot be empty')
         super(MixedLayer, self).__init__(
@@ -2510,7 +2511,8 @@ class MixedLayer(LayerBase):
 
         self.create_bias_parameter(bias, self.config.size)
 
-        self.config.error_clipping_threshold = error_clipping_threshold
+        if error_clipping_threshold is not None:
+            self.config.error_clipping_threshold = error_clipping_threshold
 
 # like MixedLayer, but no bias parameter
 @config_func

python/paddle/trainer_config_helpers/activations.py

@@ -15,8 +15,10 @@
 __all__ = ["TanhActivation", "SigmoidActivation",
            "SoftmaxActivation", "IdentityActivation", "LinearActivation",
            'SequenceSoftmaxActivation', 'ExpActivation',
-           "ReluActivation", "BReluActivation", "SoftReluActivation", "STanhActivation",
-           "AbsActivation", "SquareActivation", "BaseActivation"]
+           "ReluActivation", "BReluActivation", "SoftReluActivation",
+           "STanhActivation",
+           "AbsActivation", "SquareActivation",
+           "BaseActivation"]
 
 
 class BaseActivation(object):
@@ -36,6 +38,9 @@ class BaseActivation(object):
         self.name = name
         self.support_hppl = support_hppl
 
+    def __repr__(self):
+        return self.name
+
 
 class TanhActivation(BaseActivation):
     """

python/paddle/trainer_config_helpers/layers.py

@@ -13,6 +13,7 @@
 # limitations under the License.
 
 import functools
+import collections
 
 from paddle.trainer.config_parser import *
 from .activations import LinearActivation, SigmoidActivation, TanhActivation, \
@@ -21,6 +22,7 @@ from .evaluators import *
 from .poolings import MaxPooling, AvgPooling, BasePoolingType
 from .attrs import *
 from .default_decorators import *
+
 try:
     import cPickle as pickle
 except ImportError:
@@ -51,7 +53,8 @@ __all__ = ["full_matrix_projection", "AggregateLevel", "ExpandLevel",
            'cross_entropy_with_selfnorm', 'cross_entropy',
            'multi_binary_label_cross_entropy',
            'rank_cost', 'lambda_cost', 'huber_cost',
-           'block_expand_layer', 'out_prod_layer', 'print_layer'
+           # 'block_expand_layer',  # TODO(yuyang18): this layer is not correct
+           'out_prod_layer', 'print_layer'
            ]
 
 
@@ -165,11 +168,12 @@ class LayerOutput(object):
     :param activation: Layer Activation.
     :type activation: BaseActivation.
     :param parents: Layer's parents.
-    :type parents: list|tuple
+    :type parents: list|tuple|collection.Sequence
     """
 
     def __init__(self, name, layer_type, parents=None, activation=None,
-                 num_filters=None, img_norm_type=None, size=None, outputs=None):
+                 num_filters=None, img_norm_type=None, size=None, outputs=None,
+                 reverse=None):
         assert isinstance(name, basestring)
         assert isinstance(layer_type, basestring)
         assert LayerType.is_layer_type(layer_type)
@@ -185,6 +189,7 @@ class LayerOutput(object):
         if outputs is None:
             outputs = ['default']
         self.outputs = outputs
+        self.reverse = reverse
 
     def __repr__(self):
         """
@@ -204,25 +209,6 @@ DROPOUT = 'drop_rate'
 DEVICE = 'device'
 
 
-def check_input(input):
-    """
-    Check input is a LayerOutput or list of LayerOutput or tuple of LayerOutput
-    if is a LayerOutput,
-
-    :param input: The input layer. Could be a list/tuple of input layer.
-    :type input: LayerOutput|list|tuple
-    :return: list of LayerOutput
-    :rtype: list of LayerOutput
-    """
-
-    if isinstance(input, LayerOutput):
-        return [input]
-    assert isinstance(input, list)
-    for inp in input:
-        assert isinstance(inp, LayerOutput)
-    return list(input)
-
-
 def layer_support(*attrs):
     attrs_list = list(attrs) 
     attrs_list.append(DEVICE)
@@ -292,6 +278,43 @@ def full_matrix_projection(input, size=0, param_attr=None):
     return proj
 
 
+@wrap_param_attr_default()
+def trans_full_matrix_projection(input, size=0, param_attr=None):
+    """
+    Different from full_matrix_projection, this projection performs matrix
+    multiplication, using transpose of weight.
+
+    ..  math::
+        out.row[i] += in.row[i] * w^\mathrm{T}
+
+    :math:`w^\mathrm{T}` means transpose of weight.
+    The simply usage is:
+
+    .. code-block:: python
+
+       proj = trans_full_matrix_projection(input=layer,
+                                           size=100,
+                                           param_attr=ParamAttr(
+                                                name='_proj',
+                                                initial_mean=0.0,
+                                                initial_std=0.01))
+
+    :param input: input layer
+    :type input: LayerOutput
+    :param size: The parameter size. Means the width of parameter.
+    :type size: int
+    :param param_attr: Parameter config, None if use default.
+    :type param_attr: ParameterAttribute
+    :return: A TransposedFullMatrixProjection Object.
+    :rtype: TransposedFullMatrixProjection
+    """
+    proj = TransposedFullMatrixProjection(input_layer_name=input.name,
+                                          size=size,
+                                          **param_attr.attr)
+    proj.origin = input
+    return proj
+
+
 @wrap_param_attr_default()
 def table_projection(input, size=0, param_attr=None):
     """
@@ -369,7 +392,7 @@ def identity_projection(input, offset=None):
     Note that both of two projections should not have any parameter.
 
     :param input: Input Layer.
-    :type input: LayerOutput.
+    :type input: LayerOutput
     :param offset: Offset, None if use default.
     :type offset: int
     :return: A IdentityProjection or IdentityOffsetProjection Object
@@ -412,10 +435,11 @@ def dotmul_projection(input, param_attr=None):
     proj = DotMulProjection(input_layer_name=input.name,
                             size=input.size,
                             **param_attr.attr)
-    proj.origin = input 
+    proj.origin = input
     return proj
 
-def dotmul_operator(x, y, scale=1):
+
+def dotmul_operator(a=None, b=None, scale=1, **kwargs):
     """
     DotMulOperator takes two inputs and performs element-wise multiplication:
 
@@ -431,22 +455,31 @@ def dotmul_operator(x, y, scale=1):
 
        op = dotmul_operator(x=layer1, y=layer2, scale=0.5)
 
-    :param x: Input layer1
-    :type x: LayerOutput
-    :param y: Input layer2
-    :type y: LayerOutput
+    :param a: Input layer1
+    :type a: LayerOutput
+    :param b: Input layer2
+    :type b: LayerOutput
     :param scale: config scalar, default value is one.
     :type scale: float
     :return: A DotMulOperator Object.
     :rtype: DotMulOperator
     """
-    assert isinstance(x, LayerOutput)
-    assert isinstance(y, LayerOutput)
-    op = DotMulOperator(input_layer_names=[x.name, y.name],
+    if 'x' in kwargs or 'y' in kwargs:
+        logger.warning('x and y arguments for dotmul_operator is deprecated. '
+                       'Please use a and b as parameter.')
+    a = kwargs.get('x', a)    # For Backward capacity.
+    b = kwargs.get('y', b)
+    assert isinstance(a, LayerOutput)
+    assert isinstance(b, LayerOutput)
+    if a.size is not None and b.size is not None:
+        assert a.size == b.size
+
+    op = DotMulOperator(input_layer_names=[a.name, b.name],
                         scale=scale)
-    op.origin = [x, y]
+    op.origin = [a, b]
     return op
 
+
 @wrap_bias_attr_default(['padding_attr'])
 def context_projection(input, context_len, context_start=None,
                        padding_attr=False):
@@ -615,7 +648,7 @@ def mixed_layer(size=0, input=None, name=None, act=None, bias_attr=False,
     else:
         with mixed_layer(name=name, size=size, act=act, bias_attr=bias_attr,
                          layer_attr=layer_attr) as m:
-            if isinstance(input, list) or isinstance(input, tuple):
+            if isinstance(input, collections.Sequence):
                 for each in input:
                     m += each
             else:
@@ -725,23 +758,19 @@ def fc_layer(input, size, act=None, name=None,
     """
     if isinstance(input, LayerOutput):
         input = [input]
-        assert not isinstance(param_attr, list)
+        assert not isinstance(param_attr, collections.Sequence)
         param_attr = [param_attr]
     else:
-        if isinstance(param_attr, list) or isinstance(param_attr, tuple):
+        if isinstance(param_attr, collections.Sequence):
             assert len(input) == len(param_attr)
         else:
             param_attr = [copy.deepcopy(param_attr) for _ in range(len(input))]
 
-    assert isinstance(input, list)
-
-    def __idx_to_input__(i):
-        attr = param_attr[i]
-        assert isinstance(attr, ParameterAttribute)
-        return Input(input[i].name, **attr.attr)
+    assert isinstance(input, collections.Sequence)
 
     Layer(
-        inputs=map(__idx_to_input__, range(len(input))),
+        inputs=[Input(ipt.name, **attr.attr) for ipt, attr in zip(
+            input, param_attr)],
         name=name,
         type=LayerType.FC_LAYER,
         size=size,
@@ -762,16 +791,20 @@ def print_layer(input, name=None):
     :type name: basestring
     :param input: The input layer. Could be a list/tuple of input layer.
     :type input: LayerOutput|list|tuple
-    :return: No return
+    :return: LayerOutput
     """
-    input = check_input(input)
+    if isinstance(input, LayerOutput):
+        input = [input]
+    assert isinstance(input, collections.Sequence)  # list or tuple
+    for each in input:
+        assert isinstance(each, LayerOutput)
 
     Layer(
         name=name,
         type=LayerType.PRINT_LAYER,
         inputs=[l.name for l in input],
     )
-    LayerOutput(name, LayerType.PRINT_LAYER, input)
+    # this layer don't return anything, can not be input of other layer.
 
 
 @wrap_name_default("seq_pooling")
@@ -810,8 +843,13 @@ def pooling_layer(input, pooling_type=None, name=None, bias_attr=None,
     :rtype: LayerType
     """
     extra_dict = dict()
+    # noinspection PyUnresolvedReferences
     if isinstance(pooling_type, AvgPooling):
         extra_dict['average_strategy'] = pooling_type.strategy
+    elif isinstance(pooling_type, MaxPooling) and \
+                    pooling_type.output_max_index is not None:
+        assert isinstance(pooling_type.output_max_index, bool)
+        extra_dict['output_max_index'] = pooling_type.output_max_index
     extra_dict.update(ExtraLayerAttribute.to_kwargs(layer_attr))
 
     Layer(
@@ -835,7 +873,7 @@ def pooling_layer(input, pooling_type=None, name=None, bias_attr=None,
 @wrap_name_default("lstmemory")
 @layer_support(DROPOUT)
 def lstmemory(input, name=None, reverse=False, act=None,
-              gate_act=None,
+              gate_act=None, size=None,
               state_act=None, bias_attr=None, param_attr=None,
               layer_attr=None):
     """
@@ -900,6 +938,16 @@ def lstmemory(input, name=None, reverse=False, act=None,
     assert gate_act.support_hppl
     assert state_act.support_hppl
     assert act.support_hppl
+    assert input.size is not None and input.size % 4 == 0
+    if size is not None:
+        if input.size / 4 == size:
+            plog = logger.warning
+        else:
+            plog = logger.fatal
+
+        plog("NOTE: The lstmemory layer[%s]'s size is set by previous input "
+             "layer. The lstm size should be equal with input layer size/4. The"
+             " size which is set explicitly will be ignored." % name)
 
     Layer(name=name,
           type=LayerType.LSTMEMORY,
@@ -911,8 +959,9 @@ def lstmemory(input, name=None, reverse=False, act=None,
           inputs=[Input(input.name, **param_attr.attr)],
           **ExtraLayerAttribute.to_kwargs(layer_attr))
 
-    return LayerOutput(name, LayerType.LSTMEMORY, [input],
-                       size=input.size / 4 if input.size is not None else None)
+    return LayerOutput(name, LayerType.LSTMEMORY, [input], size=input.size / 4,
+                       reverse=reverse)
+
 
 @wrap_bias_attr_default()
 @wrap_param_attr_default()
@@ -922,7 +971,7 @@ def lstmemory(input, name=None, reverse=False, act=None,
 @wrap_name_default("gru")
 @layer_support(DROPOUT)
 def grumemory(input, name=None, reverse=False, act=None,
-              gate_act=None,
+              gate_act=None, size=None,
               bias_attr=None, param_attr=None,
               layer_attr=None):
     """
@@ -980,7 +1029,7 @@ def grumemory(input, name=None, reverse=False, act=None,
     :type name: None|basestring
     :param input: input layer.
     :type input: LayerOutput.
-    :param reverse: Wether sequence process is reversed or not.
+    :param reverse: Whether sequence process is reversed or not.
     :type reverse: bool
     :param act: activation type, TanhActivation by default. This activation
                 affects the :math:`{\\tilde{h_t}}`.
@@ -996,12 +1045,23 @@ def grumemory(input, name=None, reverse=False, act=None,
     :type param_attr: ParameterAttribute|None|False
     :param layer_attr: Extra Layer attribute
     :type layer_attr: ExtraLayerAttribute|None
+    :param size: Stub parameter of size, but actually not used. If set this size
+                 will get a warning.
+    :type size: None
     :return: LayerOutput object.
     :rtype: LayerOutput
     """
-
     assert act.support_hppl
     assert gate_act.support_hppl
+    assert input.size is not None and input.size % 3 == 0
+    if size is not None:
+        if input.size / 3 == size:
+            plog = logger.warning
+        else:
+            plog = logger.fatal
+        plog("NOTE: the gru memory layer's size is set by previous input layer,"
+             " and should be input size / 3. Set size explicitly will be "
+             "ignored.")
 
     Layer(name=name,
           type=LayerType.GRUMEMORY,
@@ -1013,8 +1073,9 @@ def grumemory(input, name=None, reverse=False, act=None,
           **ExtraLayerAttribute.to_kwargs(layer_attr)
           )
 
-    return LayerOutput(name, LayerType.GRUMEMORY, [input],
-                       size=input.size / 3 if input.size is not None else None)
+    return LayerOutput(name, LayerType.GRUMEMORY, [input], size=input.size / 3,
+                       reverse=reverse)
+
 
 @wrap_name_default()
 @layer_support()
@@ -1033,6 +1094,12 @@ def last_seq(input, name=None, agg_level=AggregateLevel.EACH_TIMESTEP,
     :return: LayerOutput object.
     :rtype: LayerOutput
     """
+    if input.reverse is not None and input.reverse:
+        logger.warning("You are getting the last instance of a sequence that"
+                       " is a output of a REVERSED layer. There is no time"
+                       " series information at all. Maybe you want to use"
+                       " first_seq instead.")
+
     Layer(
         name=name,
         type=LayerType.SEQUENCE_LAST_INSTANCE,
@@ -1061,6 +1128,13 @@ def first_seq(input, name=None, agg_level=AggregateLevel.EACH_TIMESTEP,
     :return: LayerOutput object.
     :rtype: LayerOutput
     """
+
+    if input.reverse is not None and not input.reverse:
+        logger.warning('You are getting the first instance for a time series,'
+                       ' and it is a normal recurrent layer output. There is no'
+                       ' time series information at all. Maybe you want to use'
+                       ' last_seq instead.')
+
     Layer(
         name=name,
         type=LayerType.SEQUENCE_FIRST_INSTANCE,
@@ -1076,6 +1150,7 @@ class ExpandLevel(object):
     FROM_TIMESTEP = AggregateLevel.EACH_TIMESTEP
     FROM_SEQUENCE = AggregateLevel.EACH_SEQUENCE
 
+
 @wrap_name_default()
 @layer_support()
 def expand_layer(input, expand_as,
@@ -1126,7 +1201,6 @@ def expand_layer(input, expand_as,
                        parents=[input, expand_as])
 
 
-
 @wrap_name_default()
 @layer_support()
 def interpolation_layer(input, weight, name=None, layer_attr=None):
@@ -1158,10 +1232,15 @@ def interpolation_layer(input, weight, name=None, layer_attr=None):
     :return: LayerOutput object.
     :rtype: LayerOutput
     """
-    assert isinstance(input, list) or isinstance(input, tuple)
+    assert isinstance(input, collections.Sequence)
     assert len(input) == 2
-    assert input[0].size == input[1].size
-    assert weight.size == 1
+    assert isinstance(input[0], LayerOutput) and isinstance(input[1],
+                                                            LayerOutput)
+    if input[0].size is not None and input[1].size is not None:
+        assert input[0].size == input[1].size
+    assert isinstance(weight, LayerOutput)
+    if weight.size is not None:
+        assert weight.size == 1
     Layer(
         name=name,
         type=LayerType.INTERPOLATION_LAYER,
@@ -1203,11 +1282,13 @@ def power_layer(input, weight, name=None, layer_attr=None):
     :return: LayerOutput object.
     :rtype: LayerOutput
     """
-    assert weight.size == 1
+    assert isinstance(input, LayerOutput) and isinstance(weight, LayerOutput)
+    if weight.size is not None:
+        assert weight.size == 1
     Layer(
         name=name,
         type=LayerType.POWER_LAYER,
-        inputs=[input.name, weight.name],
+        inputs=[weight.name, input.name],
         **ExtraAttr.to_kwargs(layer_attr)
     )
     return LayerOutput(name, LayerType.POWER_LAYER,
@@ -1246,7 +1327,9 @@ def scaling_layer(input, weight, name=None, layer_attr=None):
     :return: LayerOutput object.
     :rtype: LayerOutput
     """
-    assert weight.size == 1
+    assert isinstance(weight, LayerOutput) and isinstance(input, LayerOutput)
+    if weight.size is not None:
+        assert weight.size == 1
     Layer(
         name=name,
         type=LayerType.SCALING_LAYER,
@@ -1325,6 +1408,7 @@ def cos_sim(a, b, scale=5, size=1, name=None, layer_attr=None):
     :return: LayerOutput object.
     :rtype: LayerOutput
     """
+    assert isinstance(a, LayerOutput) and isinstance(b, LayerOutput)
     if size == 1:
         Layer(
             name=name,
@@ -1334,6 +1418,8 @@ def cos_sim(a, b, scale=5, size=1, name=None, layer_attr=None):
             **ExtraLayerAttribute.to_kwargs(layer_attr)
         )
     else:
+        if a.size is not None and b.size is not None:
+            assert size == b.size / a.size
         Layer(
             name=name,
             type=LayerType.COSINE_SIM_VEC,
@@ -1344,11 +1430,13 @@ def cos_sim(a, b, scale=5, size=1, name=None, layer_attr=None):
         )
     return LayerOutput(name, LayerType.COSINE_SIM, parents=[a, b])
 
+
 @wrap_name_default()
 @wrap_bias_attr_default(has_bias=True)
+@wrap_param_attr_default()
 @layer_support()
 def hsigmoid(input, label, num_classes, name=None, bias_attr=None,
-             layer_attr=None):
+             param_attr=None, layer_attr=None):
     """
     Organize the classes into a binary tree. At each node, a sigmoid function
     is used to calculate the probability of belonging to the right branch.
@@ -1382,15 +1470,23 @@ def hsigmoid(input, label, num_classes, name=None, bias_attr=None,
     """
     if isinstance(input, LayerOutput):
         input = [input]
-    assert isinstance(input, list) or isinstance(input, tuple)
+        if not isinstance(param_attr, collections.Sequence):
+            param_attr = [param_attr]
+    else:
+        if not isinstance(param_attr, collections.Sequence):
+            param_attr = [param_attr] * len(input)
+        else:
+            assert len(param_attr) == len(input)
+
+    assert isinstance(input, collections.Sequence)
     assert isinstance(label, LayerOutput)
     assert label.layer_type == LayerType.DATA
 
     ipts_for_layer = []
     parents = []
-    for each_input in input:
+    for each_input, each_param_attr in zip(input, param_attr):
         assert isinstance(each_input, LayerOutput)
-        ipts_for_layer.append(each_input.name)
+        ipts_for_layer.append(Input(each_input.name, **each_param_attr.attr))
         parents.append(each_input)
     ipts_for_layer.append(label.name)
     parents.append(label)
@@ -1405,6 +1501,7 @@ def hsigmoid(input, label, num_classes, name=None, bias_attr=None,
     )
     return LayerOutput(name, LayerType.HSIGMOID, parents=parents)
 
+
 @wrap_name_default("conv")
 @wrap_param_attr_default()
 @wrap_bias_attr_default()
@@ -1438,23 +1535,26 @@ def img_conv_layer(input, filter_size, num_filters,
     :type name: basestring
     :param input: Layer Input.
     :type input: LayerOutput
-    :param filter_size: The x dimension of a filter kernel.
-    :type filter_size: int
+    :param filter_size: The x dimension of a filter kernel. Or input a tuple for
+                        two image dimension.
+    :type filter_size: int|tuple|list
     :param filter_size_y: The y dimension of a filter kernel. Since PaddlePaddle
                         currently supports rectangular filters, the filter's
                         shape will be (filter_size, filter_size_y).
-    :type filter_size_y: int
+    :type filter_size_y: int|None
     :param num_filters: Each filter group's number of filter
     :param act: Activation type. Default is tanh
     :type act: BaseActivation
     :param groups: Group size of filters.
     :type groups: int
-    :param stride: The x dimension of the stride.
-    :type stride: int
+    :param stride: The x dimension of the stride. Or input a tuple for two image
+                   dimension.
+    :type stride: int|tuple|list
     :param stride_y: The y dimension of the stride.
     :type stride_y: int
-    :param padding: The x dimension of the padding.
-    :type padding: int
+    :param padding: The x dimension of the padding. Or input a tuple for two
+                    image dimension
+    :type padding: int|tuple|list
     :param padding_y: The y dimension of the padding.
     :type padding_y: int
     :param bias_attr: Convolution bias attribute. None means default bias.
@@ -1475,13 +1575,30 @@ def img_conv_layer(input, filter_size, num_filters,
     if num_channels is None:
         assert input.num_filters is not None
         num_channels = input.num_filters
+
     if filter_size_y is None:
-        filter_size_y = filter_size
+        if isinstance(filter_size, collections.Sequence):
+            assert len(filter_size) == 2
+            filter_size, filter_size_y = filter_size
+        else:
+            filter_size_y = filter_size
+
     if stride_y is None:
-        stride_y = stride
+        if isinstance(stride, collections.Sequence):
+            assert len(stride) == 2
+            stride, stride_y = stride
+        else:
+            stride_y = stride
+
     if padding_y is None:
-        padding_y = padding
-    if param_attr.attr.get('initial_smart') == True: # special initial for conv layers.
+        if isinstance(padding, collections.Sequence):
+            assert len(padding) == 2
+            padding, padding_y = padding
+        else:
+            padding_y = padding
+
+    if param_attr.attr.get('initial_smart'):
+        # special initial for conv layers.
         init_w = (2.0 / (filter_size ** 2 * num_channels)) ** 0.5
         param_attr.attr["initial_mean"] = 0.0
         param_attr.attr["initial_std"] = init_w
@@ -1492,8 +1609,9 @@ def img_conv_layer(input, filter_size, num_filters,
         inputs=Input(input.name, conv=Conv(
             filter_size=filter_size, padding=padding, stride=stride,
             channels=num_channels, groups=groups,
-            filter_size_y=filter_size_y, padding_y=padding_y, stride_y=stride_y),
-            **param_attr.attr),
+            filter_size_y=filter_size_y, padding_y=padding_y,
+            stride_y=stride_y),
+                     **param_attr.attr),
         active_type=act.name,
         num_filters=num_filters,
         bias=ParamAttr.to_bias(bias_attr),
@@ -1553,7 +1671,7 @@ def img_pool_layer(input, pool_size, name=None,
         type=LayerType.POOL_LAYER,
         inputs=[Input(input.name,
                       pool=Pool(
-                          pool_type=pool_type.name + '-projection',
+                          pool_type=''.join([pool_type.name, '-projection']),
                           channels=num_channels,
                           size_x=pool_size,
                           start=start,
@@ -1607,7 +1725,6 @@ def img_cmrnorm_layer(input, size, scale=0.0128, power=0.75,
     :type power: float
     :param num_channels: input layer's filers number or channels. If
                          num_channels is None, it will be set automatically.
-    :param blocked: namely normalize in number of blocked feature maps.
     :param layer_attr: Extra Layer Attribute.
     :type layer_attr: ExtraLayerAttribute
     :return: LayerOutput object.
@@ -1660,7 +1777,7 @@ def batch_norm_layer(input, act=None, name=None, num_channels=None,
                             batch_norm for CPU. Otherwise, select batch norm
                             type based on the specified type. If you use cudnn_batch_norm,
                             we suggested you use latest version, such as v5.1.
-    :type type: None|string, None or "batch_norm" or "cudnn_batch_norm"
+    :type batch_norm_type: None|string, None or "batch_norm" or "cudnn_batch_norm"
     :param act: Activation Type. Better be relu. Because batch
                      normalization will normalize input near zero.
     :type act: BaseActivation
@@ -1821,7 +1938,7 @@ def addto_layer(input, act=None, name=None, bias_attr=None,
     if isinstance(input, LayerOutput):
         input = [input]
 
-    assert isinstance(input, list) or isinstance(input, tuple)
+    assert isinstance(input, collections.Sequence)
     ipts_for_layer = []
     for each_input in input:
         assert isinstance(each_input, LayerOutput)
@@ -1835,7 +1952,7 @@ def addto_layer(input, act=None, name=None, bias_attr=None,
         active_type=act.name,
         **ExtraLayerAttribute.to_kwargs(layer_attr)
     )
-    assert isinstance(input, list) or isinstance(input, tuple)
+
     return LayerOutput(name, LayerType.ADDTO_LAYER, parents=input,
                        activation=act, num_filters=num_filters)
 
@@ -1851,7 +1968,7 @@ def concat_layer(input, act=None, name=None, layer_attr=None):
     :param name: Layer name.
     :type name: basestring
     :param input: input layers or projections
-    :type input: list|tuple
+    :type input: list|tuple|collection.Sequence
     :param act: Activation type.
     :type act: BaseActivation
     :param layer_attr: Extra Layer Attribute.
@@ -1865,10 +1982,10 @@ def concat_layer(input, act=None, name=None, layer_attr=None):
     elif isinstance(input, Projection):
         input = [input]
     else:
-        assert isinstance(input, list) or isinstance(input, tuple)
+        assert isinstance(input, collections.Sequence)
 
     def __is_type__(o, tp):
-        if not isinstance(o, list) and not isinstance(o, tuple):
+        if not isinstance(o, collections.Sequence):
             if o == tp:
                 return True
             elif len(o.__bases__) == 0:
@@ -2150,28 +2267,51 @@ def get_output_layer(input, arg_name, name=None, layer_attr=None):
 @wrap_param_attr_default()
 @layer_support()
 def recurrent_layer(input, act=None, bias_attr=None,
-                    param_attr=None, name=None, layer_attr=None):
+                    param_attr=None, name=None, reverse=False, layer_attr=None):
     """
-    TODO(yuyang18): Add docs
+    Simple recurrent unit layer. It is just a fully connect layer through both
+    time and neural network.
 
-    :param input:
-    :param size:
-    :param act:
-    :param bias_attr:
-    :param param_attr:
-    :param name:
-    :param layer_attr:
+    For each sequence [start, end] it performs the following computation\:
+
+    ..  math::
+
+        out_{i} = act(in_{i})     \\      \\      \\text{for} \\ i = start \\\\
+        out_{i} = act(in_{i} + out_{i-1} * W) \\ \\ \\text{for} \\ start < i <= end
+
+    If reversed is true, the order is reversed\:
+
+    ..  math::
+
+        out_{i} = act(in_{i})           \\    \\   \\text{for} \\ i = end  \\\\
+        out_{i} = act(in_{i} + out_{i+1} * W) \\ \\ \\text{for} \\ start <= i < end
+
+
+    :param input: Input Layer
+    :type input: LayerOutput
+    :param act: activation.
+    :type act: BaseActivation
+    :param bias_attr: bias attribute.
+    :type bias_attr: ParameterAttribute
+    :param param_attr: parameter attribute.
+    :type param_attr: ParameterAttribute
+    :param name: name of the layer
+    :type name: basestring
+    :param layer_attr: Layer Attribute.
+    :type layer_attr: ExtraLayerAttribute
     :return: LayerOutput object.
+    :rtype: LayerOutput
     """
     Layer(name=name,
           type=LayerType.RECURRENT_LAYER,
           inputs=Input(input.name, **param_attr.attr),
           active_type=act.name,
-          size=input.size,
           bias=ParamAttr.to_bias(bias_attr),
+          reversed=reverse,
           **ExtraAttr.to_kwargs(layer_attr))
     return LayerOutput(name=name, layer_type=LayerType.RECURRENT_LAYER,
-                       parents=[input], size=input.size, activation=act)
+                       parents=[input], size=input.size, activation=act,
+                       reverse=reverse)
 
 
 class StaticInput(object):
@@ -2179,6 +2319,7 @@ class StaticInput(object):
     StaticInput is only used in recurrent_group which defines a read-only memory
     that can be a sequence or non-sequence.
     """
+
     def __init__(self, input, is_seq=False, size=None):
         assert isinstance(input, LayerOutput)
         self.input = input
@@ -2198,6 +2339,7 @@ class SubsequenceInput(object):
 
        input = SubsequenceInput(layer)
     """
+
     def __init__(self, input):
         assert isinstance(input, LayerOutput)
         assert input.size is not None
@@ -2270,7 +2412,7 @@ def recurrent_group(step, input, reverse=False, name=None):
 
     if is_single_input(input):
         input = [input]
-    assert isinstance(input, list) or isinstance(input, tuple)
+    assert isinstance(input, collections.Sequence)
 
     def is_in_links(x):
         return isinstance(x, LayerOutput) or isinstance(x, SubsequenceInput)
@@ -2314,6 +2456,7 @@ def recurrent_group(step, input, reverse=False, name=None):
 
     for ot in layer_outs:
         assert isinstance(ot, LayerOutput)
+        ot.reverse = reverse
         if contains_sub_seq[0]:
             RecurrentLayerGroupSetOutLink(Link(ot.name, has_subseq=True))
         else:
@@ -2326,6 +2469,7 @@ def recurrent_group(step, input, reverse=False, name=None):
     else:
         return layer_outs
 
+
 class BaseGeneratedInput(object):
     def __init__(self):
         self.bos_id = None
@@ -2354,6 +2498,7 @@ class GeneratedInput(BaseGeneratedInput):
         return trg_emb
 
     def __init__(self, size, embedding_name, embedding_size):
+        super(GeneratedInput, self).__init__()
         self.size = size
         self.embedding_name = embedding_name
         self.embedding_size = embedding_size
@@ -2390,6 +2535,7 @@ def maxid_layer(input, name=None, layer_attr=None):
                        layer_type=LayerType.MAXID_LAYER,
                        parents=[input])
 
+
 @wrap_name_default()
 def out_prod_layer(input1, input2, name=None, layer_attr=None):
     """
@@ -2422,7 +2568,8 @@ def out_prod_layer(input1, input2, name=None, layer_attr=None):
           **ExtraLayerAttribute.to_kwargs(layer_attr))
     return LayerOutput(name=name,
                        layer_type=LayerType.OUT_PROD_LAYER,
-                       parents=[input1,input2])
+                       parents=[input1, input2])
+
 
 @wrap_name_default()
 def eos_layer(input, eos_id, name=None, layer_attr=None):
@@ -2475,14 +2622,14 @@ def beam_search(step, input, bos_id, eos_id, beam_size,
 
         def rnn_step(input):
             last_time_step_output = memory(name='rnn', size=512)
-            with mixed_layer(size=512) as simple_rnn:
+            with mixed_layer(size=512, name='rnn') as simple_rnn:
                 simple_rnn += full_matrix_projection(input)
                 simple_rnn += last_time_step_output
             return simple_rnn
 
         beam_gen = beam_search(name="decoder",
                                step=rnn_step,
-                               input=[StaticInput("encoder_last")],
+                               input=[StaticInput(encoder_last)],
                                bos_id=0,
                                eos_id=1,
                                beam_size=5,
@@ -2496,18 +2643,18 @@ def beam_search(step, input, bos_id, eos_id, beam_size,
     :param name: Name of the recurrent unit that generates sequences.
     :type name: base string
     :param step: A callable function that defines the calculation in a time
-                 step, and it is appled to sequences with arbitrary length by
+                 step, and it is applied to sequences with arbitrary length by
                  sharing a same set of weights.
 
                  You can refer to the first parameter of recurrent_group, or
                  demo/seqToseq/seqToseq_net.py for more details.
     :type step: callable
     :param input: Input data for the recurrent unit
-    :type input: StaticInput|GeneratedInput
+    :type input: list
     :param bos_id: Index of the start symbol in the dictionary. The start symbol
                    is a special token for NLP task, which indicates the
                    beginning of a sequence. In the generation task, the start
-                   symbol is ensential, since it is used to initialize the RNN
+                   symbol is essential, since it is used to initialize the RNN
                    internal state.
     :type bos_id: int
     :param eos_id: Index of the end symbol in the dictionary. The end symbol is
@@ -2516,6 +2663,8 @@ def beam_search(step, input, bos_id, eos_id, beam_size,
                    symbol is generated, or a pre-defined max iteration number
                    is exceeded.
     :type eos_id: int
+    :param max_length: Max generated sequence length.
+    :type max_length: int
     :param beam_size: Beam search for sequence generation is an iterative search
                       algorithm. To maintain tractability, every iteration only
                       only stores a predetermined number, called the beam_size,
@@ -2556,8 +2705,8 @@ def beam_search(step, input, bos_id, eos_id, beam_size,
     real_input = []
     for i, each_input in enumerate(input):
         # print type(each_input)
-        assert isinstance(each_input, StaticInput) or isinstance(each_input,
-                                                          BaseGeneratedInput)
+        assert isinstance(each_input, StaticInput) or isinstance(
+            each_input, BaseGeneratedInput)
         if isinstance(each_input, BaseGeneratedInput):
             assert generated_input_index == -1
             generated_input_index = i
@@ -2667,7 +2816,7 @@ def classification_cost(input, label, name=None,
 
         e(name=e.__name__, input=input, label=label)
 
-    if not isinstance(evaluator, list) and not isinstance(evaluator, tuple):
+    if not isinstance(evaluator, collections.Sequence):
         evaluator = [evaluator]
 
     for each_evaluator in evaluator:
@@ -2675,8 +2824,9 @@ def classification_cost(input, label, name=None,
 
     return LayerOutput(name, LayerType.COST, parents=[input, label])
 
+
 def conv_operator(img, filter, filter_size, num_filters,
-                  num_channel=None, stride=1, padding=0, groups=1,
+                  num_channel=None, stride=1, padding=0,
                   filter_size_y=None, stride_y=None, padding_y=None):
     """
     Different from img_conv_layer, conv_op is an Operator, which can be used
@@ -2690,7 +2840,7 @@ def conv_operator(img, filter, filter_size, num_filters,
 
        op = conv_operator(img=input1,
                           filter=input2,
-                          filter_size=3.0,
+                          filter_size=3,
                           num_filters=64,
                           num_channels=64)
 
@@ -2725,8 +2875,16 @@ def conv_operator(img, filter, filter_size, num_filters,
         stride_y = stride
     if padding_y is None:
         padding_y = padding
+
+    if num_channel is None:
+        num_channel = img.num_filters
+
+    assert isinstance(filter, LayerOutput)
+    if filter.size is not None:
+        filter.size = filter_size * filter_size_y * num_filters * num_channel
+
     op = ConvOperator(input_layer_names=[img.name, filter.name],
-                      num_filters = num_filters,
+                      num_filters=num_filters,
                       conv_conf=Conv(filter_size=filter_size,
                                      padding=padding,
                                      stride=stride,
@@ -2734,13 +2892,13 @@ def conv_operator(img, filter, filter_size, num_filters,
                                      filter_size_y=filter_size_y,
                                      padding_y=padding_y,
                                      stride_y=stride_y,
-                                     groups=groups))
+                                     groups=1))
     op.origin = [img, filter]
     return op
 
 
 @wrap_name_default()
-def conv_shift_layer(input, name=None):
+def conv_shift_layer(a, b, name=None):
     """
     This layer performs cyclic convolution for two input. For example:
       - a[in]: contains M elements.
@@ -2752,68 +2910,77 @@ def conv_shift_layer(input, name=None):
         c[i] = \sum_{j=-(N-1)/2}^{(N-1)/2}a_{i+j} * b_{j}
 
     In this formular:
-     - a's index is computed modulo M.
-     - b's index is computed modulo N.
+     - a's index is computed modulo M. When it is negative, then get item from
+       the right side (which is the end of array) to the left.
+     - b's index is computed modulo N. When it is negative, then get item from
+       the right size (which is the end of array) to the left.
 
     The example usage is:
 
     .. code-block:: python
 
-       conv_shift = conv_shif_layer(input=[layer1, layer2])
+       conv_shift = conv_shift_layer(input=[layer1, layer2])
 
     :param name: layer name
     :type name: basestring
-    :param input: Input layer.
-    :type input: LayerOutput|list|tuple.
+    :param a: Input layer a.
+    :type a: LayerOutput
+    :param b: input layer b
+    :type b: LayerOutput
     :return: LayerOutput object.
     :rtype: LayerOutput
     """
-    assert isinstance(input, list) or isinstance(input, tuple)
+    assert isinstance(a, LayerOutput) and isinstance(b, LayerOutput)
+    assert b.size is None or b.size % 2 == 1  # size of b must be odd.
     Layer(
         name=name,
         type=LayerType.CONV_SHIFT_LAYER,
-        inputs=[x.name for x in input],
+        inputs=[a.name, b.name],
     )
 
-    return LayerOutput(name, LayerType.CONV_SHIFT_LAYER, parents=input)
+    return LayerOutput(name, LayerType.CONV_SHIFT_LAYER, parents=[a, b],
+                       size=a.size)
 
 
 @wrap_name_default()
 @wrap_param_attr_default()
 @wrap_bias_attr_default()
+@wrap_act_default(act=LinearActivation())
 @layer_support(ERROR_CLIPPING, DROPOUT)
-def tensor_layer(input, size, act=None, name=None,
+def tensor_layer(a, b, size, act=None, name=None,
                  param_attr=None, bias_attr=None, layer_attr=None):
     """
     This layer performs tensor operation for two input.
     For example, each sample:
 
     .. math::
-       y_{i} = x_{1} * W_{i} * {x_{2}^\mathrm{T}}, i=0,1,...,K-1
+       y_{i} = a * W_{i} * {b^\mathrm{T}}, i=0,1,...,K-1
 
     In this formular:
-      - :math:`x_{1}`: the first input contains M elements.
-      - :math:`x_{2}`: the second input contains N elements.
+      - :math:`a`: the first input contains M elements.
+      - :math:`b`: the second input contains N elements.
       - :math:`y_{i}`: the i-th element of y.
       - :math:`W_{i}`: the i-th learned weight, shape if [M, N]
-      - :math:`{x_{2}}^\mathrm{T}`: the transpose of :math:`x_{2}`.
+      - :math:`b^\mathrm{T}`: the transpose of :math:`b_{2}`.
 
     The simple usage is:
 
     .. code-block:: python
 
-       tensor = tensor_layer(input=[layer1, layer2])
+       tensor = tensor_layer(a=layer1, b=layer2, size=1000)
 
     :param name: layer name
     :type name: basestring
-    :param input: Input layer.
-    :type input: LayerOutput|list|tuple.
+    :param a: Input layer a.
+    :type a: LayerOutput
+    :param b: input layer b.
+    :type b: LayerOutput
     :param size: the layer dimension.
     :type size: int.
     :param act: Activation Type. Default is tanh.
     :type act: BaseActivation
     :param param_attr: The Parameter Attribute.
-    :type param_attr: ParameterAttribute|list
+    :type param_attr: ParameterAttribute
     :param bias_attr: The Bias Attribute. If no bias, then pass False or
                       something not type of ParameterAttribute. None will get a
                       default Bias.
@@ -2823,65 +2990,26 @@ def tensor_layer(input, size, act=None, name=None,
     :return: LayerOutput object.
     :rtype: LayerOutput
     """
-    assert isinstance(input, list) or isinstance(input, tuple)
-    assert len(input) == 2
+    assert isinstance(a, LayerOutput) and isinstance(b, LayerOutput)
     Layer(
         name=name,
         size=size,
         type=LayerType.TENSOR_LAYER,
         active_type=act.name,
         bias=ParamAttr.to_bias(bias_attr),
-        inputs=[Input(input[0].name, **param_attr.attr),
-                Input(input[1].name)],
+        inputs=[Input(a.name, **param_attr.attr),
+                Input(b.name)],
         **ExtraLayerAttribute.to_kwargs(layer_attr)
     )
-    return LayerOutput(name, LayerType.TENSOR_LAYER, parents=input,
+    return LayerOutput(name, LayerType.TENSOR_LAYER, parents=[a, b],
                        activation=act, size=size)
 
 
-@wrap_param_attr_default()
-def trans_full_matrix_projection(input, size=0, param_attr=None):
-    """
-    Different from full_matrix_projection, this projection performs matrix
-    multiplication, using transpose of weight.
-
-    ..  math::
-        out.row[i] += in.row[i] * w^\mathrm{T}
-
-    :math:`w^\mathrm{T}` means transpose of weight.
-    The simply usage is:
-
-    .. code-block:: python
-
-       proj = trans_full_matrix_projection(input=layer,
-                                           size=100,
-                                           param_attr=ParamAttr(
-                                                name='_proj',
-                                                initial_mean=0.0,
-                                                initial_std=0.01))
-
-    :param input: input layer
-    :type input: LayerOutput
-    :param size: The parameter size. Means the width of parameter.
-    :type size: int
-    :param param_attr: Parameter config, None if use default.
-    :type param_attr: ParameterAttribute
-    :return: A TransposedFullMatrixProjection Object.
-    :rtype: TransposedFullMatrixProjection
-    """
-    proj = TransposedFullMatrixProjection(input_layer_name=input.name,
-                                          size=size,
-                                          **param_attr.attr)
-    proj.origin = input
-    proj.origin.projection = "trans_matrix"
-    return proj
-
-
 @wrap_name_default()
 @wrap_param_attr_default()
 @wrap_bias_attr_default()
 @wrap_act_default()
-def selective_fc_layer(input, size, act=None, name=None,
+def selective_fc_layer(input, select, size, act=None, name=None,
                        pass_generation=False,
                        has_selected_colums=True,
                        mul_ratio=0.02,
@@ -2896,12 +3024,15 @@ def selective_fc_layer(input, size, act=None, name=None,
 
     .. code-block:: python
 
-       sel_fc = selective_fc_layer(input=input, 128, act=TanhActivation())
+       sel_fc = selective_fc_layer(input=input, size=128, act=TanhActivation())
 
     :param name: The Layer Name.
     :type name: basestring
     :param input: The input layer.
     :type input: LayerOutput|list|tuple
+    :param select: The select layer. The output of select layer should be a
+                   sparse binary matrix, and treat as the mask of selective fc.
+    :type select: LayerOutput
     :param size: The layer dimension.
     :type size: int
     :param act: Activation Type. Default is tanh.
@@ -2919,33 +3050,33 @@ def selective_fc_layer(input, size, act=None, name=None,
     """
     if isinstance(input, LayerOutput):
         input = [input]
-        assert not isinstance(param_attr, list)
+        assert not isinstance(param_attr, collections.Sequence)
         param_attr = [param_attr]
     else:
-        if isinstance(param_attr, list) or isinstance(param_attr, tuple):
+        if isinstance(param_attr, collections.Sequence):
             assert len(input) == len(param_attr)
         else:
             param_attr = [copy.deepcopy(param_attr) for _ in range(len(input))]
 
-    assert isinstance(input, list)
-
-    def __idx_to_input__(i):
-        attr = param_attr[i]
-        assert isinstance(attr, ParameterAttribute)
-        return Input(input[i].name, **attr.attr)
-
+    assert isinstance(input, collections.Sequence)
+    assert isinstance(select, LayerOutput)
+    if select.size is not None:
+        assert select.size == size
     Layer(
-        inputs=map(__idx_to_input__, range(len(input))),
+        inputs=[Input(ipt.name, **attr.attr) for ipt, attr in zip(
+            input, param_attr)] + [select.name],
         name=name,
         type=LayerType.SEL_FC_LAYER,
         size=size,
+        bias=ParameterAttribute.to_bias(bias_attr),
         active_type=act.name,
         selective_fc_pass_generation=pass_generation,
         has_selected_colums=has_selected_colums,
         selective_fc_full_mul_ratio=mul_ratio,
         **ExtraLayerAttribute.to_kwargs(layer_attr)
     )
-    return LayerOutput(name, LayerType.SEL_FC_LAYER, input, activation=act,
+    return LayerOutput(name, LayerType.SEL_FC_LAYER, list(input) + [select],
+                       activation=act,
                        size=size)
 
 
@@ -3013,7 +3144,7 @@ def slope_intercept_layer(input, name=None, slope=1.0, intercept=0.0):
 
 
 @wrap_name_default()
-def linear_comb_layer(weights, vectors, size, name=None):
+def linear_comb_layer(weights, vectors, size=None, name=None):
     """
     A layer for weighted sum of vectors takes two inputs.
       - Input: size of weights is M
@@ -3043,11 +3174,13 @@ def linear_comb_layer(weights, vectors, size, name=None):
 
     .. code-block:: python
 
-       linear_comb = linear_comb_layer(weighs=weight, vectors=vectors,
+       linear_comb = linear_comb_layer(weights=weight, vectors=vectors,
                                        size=elem_dim)
 
-    :param input: The input layers.
-    :type input: LayerOutput
+    :param weights: The weight layer.
+    :type weights: LayerOutput
+    :param vectors: The vector layer.
+    :type vectors: LayerOutput
     :param size: the dimension of this layer.
     :type size: int
     :param name: The Layer Name.
@@ -3055,7 +3188,13 @@ def linear_comb_layer(weights, vectors, size, name=None):
     :return: LayerOutput object.
     :rtype: LayerOutput
     """
-
+    assert isinstance(weights, LayerOutput) and isinstance(vectors, LayerOutput)
+    if vectors.size is not None and weights.size is not None:
+        assert vectors.size % weights.size == 0
+        if size is None:
+                size = vectors.size / weights.size
+        else:
+            assert size == vectors.size / weights.size
     Layer(
         name=name,
         type=LayerType.LINEAR_COMBINATION_LAYER,
@@ -3065,8 +3204,10 @@ def linear_comb_layer(weights, vectors, size, name=None):
     return LayerOutput(name, LayerType.LINEAR_COMBINATION_LAYER,
                        [weights, vectors], size=size)
 
+
 convex_comb_layer = linear_comb_layer
 
+
 @wrap_name_default()
 def block_expand_layer(input,
                        channel=0,
@@ -3128,22 +3269,22 @@ def block_expand_layer(input,
     """
     Layer(name=name,
           input=Input(input.name,
-                      block_expand=BlockExpand(channel=channel,
+                      block_expand=BlockExpand(channels=channel,
                                                block_x=block_x,
                                                block_y=block_y,
                                                stride_x=stride_x,
                                                stride_y=stride_y,
                                                padding_x=padding_x,
                                                padding_y=padding_y)
-                       ),
+                      ),
           type=LayerType.BLOCK_EXPAND,
-         )
+          )
+
+    return LayerOutput(name, LayerType.BLOCK_EXPAND, parents=[input])
 
-    return LayerOutput(name, LayerType.BLOCK_EXPAND,
-                       parents=[input], size=size)
 
 @wrap_name_default()
-def ctc_layer(input, label, size, name=None, norm_by_times=False):
+def ctc_layer(input, label, size=None, name=None, norm_by_times=False):
     """
     Connectionist Temporal Classification (CTC) is designed for temporal
     classication task. That is, for sequence labeling problems where the
@@ -3151,7 +3292,8 @@ def ctc_layer(input, label, size, name=None, norm_by_times=False):
 
     More details can be found by referring to `Connectionist Temporal
     Classification: Labelling Unsegmented Sequence Data with Recurrent
-    Neural Networks <http://machinelearning.wustl.edu/mlpapers/paper_files/icml2006_GravesFGS06.pdf>`_
+    Neural Networks <http://machinelearning.wustl.edu/mlpapers/paper_files/
+    icml2006_GravesFGS06.pdf>`_
 
     Note:
         Considering the 'blank' label needed by CTC, you need to use
@@ -3169,14 +3311,14 @@ def ctc_layer(input, label, size, name=None, norm_by_times=False):
                       size=9055,
                       norm_by_times=True)
 
-    :param input: The input layers.
+    :param input: The input layer.
     :type input: LayerOutput
     :param label: The data layer of label with variable length.
     :type label: LayerOutput
     :param size: category numbers + 1.
     :type size: int
-    :param name: The name of this layer, which can not specify.
-    :type name: string|None
+    :param name: The name of this layer
+    :type name: basestring|None
     :param norm_by_times: Whether to normalization by times. False by default.
     :type norm_by_times: bool
     :return: LayerOutput object.
@@ -3184,18 +3326,24 @@ def ctc_layer(input, label, size, name=None, norm_by_times=False):
     """
     assert isinstance(input, LayerOutput)
     assert isinstance(label, LayerOutput)
+    if label.size is not None:
+        if size is not None:
+            assert size == label.size + 1
+        else:
+            size = label.size + 1
     Layer(
-        name = name,
-        type = LayerType.CTC_LAYER,
-        size = size,
-        norm_by_times = norm_by_times,
-        inputs = [input.name, label.name]
+        name=name,
+        type=LayerType.CTC_LAYER,
+        size=size,
+        norm_by_times=norm_by_times,
+        inputs=[input.name, label.name]
     )
     return LayerOutput(name, LayerType.CTC_LAYER, [input, label], size=size)
 
+
 @wrap_name_default()
 @wrap_param_attr_default()
-def crf_layer(input, label, size, weight=None, param_attr=None, name=None):
+def crf_layer(input, label, size=None, weight=None, param_attr=None, name=None):
     """
     A layer for calculating the cost of sequential conditional random
     field model.
@@ -3211,7 +3359,7 @@ def crf_layer(input, label, size, weight=None, param_attr=None, name=None):
     :param input: The first input layer is the feature.
     :type input: LayerOutput
     :param label: The second input layer is label.
-    :type input: LayerOutput
+    :type label: LayerOutput
     :param size: The category number.
     :type size: int
     :param weight: The third layer is "weight" of each sample, which is an
@@ -3227,6 +3375,12 @@ def crf_layer(input, label, size, weight=None, param_attr=None, name=None):
     assert isinstance(input, LayerOutput)
     assert isinstance(label, LayerOutput)
     assert weight is None or isinstance(weight, LayerOutput)
+    if input.size is not None and label.size is not None:
+        assert input.size == label.size
+        if size is None:
+            size = input.size
+        else:
+            assert size == input.size
 
     ipts = [Input(input.name, **param_attr.attr),
             Input(label.name)]
@@ -3234,16 +3388,17 @@ def crf_layer(input, label, size, weight=None, param_attr=None, name=None):
         ipts.append(Input(weight.name))
 
     Layer(
-        name = name,
-        type = LayerType.CRF_LAYER,
-        size = size,
-        inputs = ipts,
+        name=name,
+        type=LayerType.CRF_LAYER,
+        size=size,
+        inputs=ipts,
     )
     parents = [input, label]
     if weight is not None:
         parents.append(weight)
     return LayerOutput(name, LayerType.CRF_LAYER, parents, size=size)
 
+
 @wrap_name_default()
 @wrap_param_attr_default()
 def crf_decoding_layer(input, size, label=None, param_attr=None, name=None):
@@ -3276,24 +3431,28 @@ def crf_decoding_layer(input, size, label=None, param_attr=None, name=None):
         ipts.append(Input(label.name))
 
     Layer(
-        name = name,
-        type = LayerType.CRF_DECODING_LAYER,
-        size = size,
-        inputs = ipts,
+        name=name,
+        type=LayerType.CRF_DECODING_LAYER,
+        size=size,
+        inputs=ipts,
     )
     parents = [input]
     if label is not None:
         parents.append(label)
     return LayerOutput(name, LayerType.CRF_DECODING_LAYER, parents, size=size)
 
+
 """
 following are cost Layers.
 """
+
+
 @wrap_name_default()
-def rank_cost(left, right, lable, weight=None, name=None, coeff=1.0):
+def rank_cost(left, right, label, weight=None, name=None, coeff=1.0):
     """
     A cost Layer for learning to rank using gradient descent. Details can refer
-    to `papers <http://research.microsoft.com/en-us/um/people/cburges/papers/ICML_ranking.pdf>`_.
+    to `papers <http://research.microsoft.com/en-us/um/people/cburges/papers/
+    ICML_ranking.pdf>`_.
     This layer contains at least three inputs. The weight is an optional
     argument, which affects the cost.
 
@@ -3350,12 +3509,13 @@ def rank_cost(left, right, lable, weight=None, name=None, coeff=1.0):
           type=LayerType.RANK_COST,
           inputs=ipts,
           coeff=coeff,
-         )
+          )
 
     return LayerOutput(name, LayerType.RANK_COST, parents=parents)
 
+
 @wrap_name_default()
-def lambda_cost(input, score, NDCG_num=5, max_sort_size=-1, coeff=1.0):
+def lambda_cost(input, score, name, NDCG_num=5, max_sort_size=-1):
     """
     lambdaCost for lambdaRank LTR approach.
 
@@ -3368,9 +3528,7 @@ def lambda_cost(input, score, NDCG_num=5, max_sort_size=-1, coeff=1.0):
                          NDCG_num=8,
                          max_sort_size=-1)
 
-    :param input: The 1st input. Samples of the same query should be loaded
-                  as sequence. User should provided socres for each sample.
-                  The score should be the 2nd input of this layer.
+    :param input: Samples of the same query should be loaded as sequence.
     :type input: LayerOutput
     :param score: The 2nd input. Score of each sample.
     :type input: LayerOutput
@@ -3388,21 +3546,22 @@ def lambda_cost(input, score, NDCG_num=5, max_sort_size=-1, coeff=1.0):
     :type max_sort_size: int
     :param name: The name of this layers. It is not necessary.
     :type name: None|basestring
-    :param coeff: The coefficient affects the gradient in the backward.
-    :type coeff: float
     :return: LayerOutput object.
     :rtype: LayerOutput
     """
+    assert isinstance(input, LayerOutput) and isinstance(score, LayerOutput)
+    if score.size is not None:
+        assert score.size == 1
     Layer(name=name,
           type=LayerType.LAMBDA_COST,
           inputs=[input.name, score.name],
           NDCG_num=NDCG_num,
-          max_sort_size=max_sort_size,
-          coeff=coeff,
-         )
+          max_sort_size=max_sort_size
+          )
 
     return LayerOutput(name, LayerType.LAMBDA_COST, parents=[input, score])
 
+
 @wrap_name_default()
 def cross_entropy(input, label, name=None, coeff=1.0):
     """
@@ -3430,9 +3589,10 @@ def cross_entropy(input, label, name=None, coeff=1.0):
           type=LayerType.CROSS_ENTROPY,
           inputs=[input.name, label.name],
           coeff=coeff,
-         )
+          )
     return LayerOutput(name, LayerType.CROSS_ENTROPY, parents=[input, label])
 
+
 @wrap_name_default()
 def cross_entropy_with_selfnorm(input, label, name=None, coeff=1.0,
                                 softmax_selfnorm_alpha=0.1):
@@ -3463,12 +3623,13 @@ def cross_entropy_with_selfnorm(input, label, name=None, coeff=1.0,
           inputs=[input.name, label.name],
           coeff=coeff,
           softmax_selfnorm_alpha=softmax_selfnorm_alpha,
-         )
+          )
 
     return LayerOutput(name,
                        LayerType.CROSS_ENTROPY_WITH_SELFNORM,
                        parents=[input, label])
 
+
 @wrap_name_default()
 def huber_cost(input, label, name=None, coeff=1.0):
     """
@@ -3482,8 +3643,6 @@ def huber_cost(input, label, name=None, coeff=1.0):
     :type input: LayerOutput.
     :param label: The input label.
     :type input: LayerOutput.
-    :param type: The type of cost.
-    :type type: basestring.
     :param name: The name of this layers. It is not necessary.
     :type name: None|basestring.
     :param coeff: The coefficient affects the gradient in the backward.
@@ -3491,14 +3650,17 @@ def huber_cost(input, label, name=None, coeff=1.0):
     :return: LayerOutput object.
     :rtype: LayerOutput.
     """
-
+    assert isinstance(input, LayerOutput)
+    if input.size is not None:
+        assert input.size == 1
     Layer(name=name,
           type=LayerType.HUBER,
           inputs=[input.name, label.name],
           coeff=coeff,
-         )
+          )
     return LayerOutput(name, LayerType.HUBER, parents=[input, label])
 
+
 @wrap_name_default()
 def multi_binary_label_cross_entropy(input, label, name=None, coeff=1.0):
     """
@@ -3522,15 +3684,16 @@ def multi_binary_label_cross_entropy(input, label, name=None, coeff=1.0):
     :rtype: LayerOutput
     """
 
-    if not isinstance(input.act, SigmoidActivation):
+    if input.activation is None or \
+            not isinstance(input.activation, SigmoidActivation):
         logger.log(logging.WARN,
                    "%s is not recommend for batch normalization's activation, "
-                   "maybe the relu is better" % act.name)
+                   "maybe the relu is better" % repr(input.activation))
 
     Layer(name=name,
           type=LayerType.MULTI_BIN_LABEL_CROSS_ENTROPY,
           inputs=[input.name, label.name],
           coeff=coeff,
-         )
+          )
     return LayerOutput(name, LayerType.MULTI_BIN_LABEL_CROSS_ENTROPY,
                        parents=[input, label])

python/paddle/trainer_config_helpers/networks.py

@@ -616,7 +616,7 @@ def lstmemory_group(input, size=None, name=None,
     cell states, or hidden states in every time step are accessible to for the
     user. This is especially useful in attention model. If you do not need to
     access to the internal states of the lstm, but merely use its outputs,
-    it is recommanded to use the lstmemory, which is relatively faster than
+    it is recommended to use the lstmemory, which is relatively faster than
     lstmemory_group.
 
     NOTE: In PaddlePaddle's implementation, the following input-to-hidden
@@ -1052,7 +1052,7 @@ def dropout_layer(input, dropout_rate, name=None):
                        layer_attr=ExtraAttr(drop_rate=dropout_rate))
 
 
-def outputs(layers):
+def outputs(layers, *args):
     """
     Declare the end of network. Currently it will only calculate the
     input/output order of network. It will calculate the predict network or
@@ -1089,9 +1089,12 @@ def outputs(layers):
     if isinstance(layers, LayerOutput):
         layers = [layers]
 
+    if len(args) != 0:
+        layers.extend(args)
+
     assert len(layers) > 0
     if len(layers) != 1:
-        logger.warning("EndOfNetwork routine try to calculate network's"
+        logger.warning("`outputs` routine try to calculate network's"
                        " inputs and outputs order. It might not work well."
                        "Please see follow log carefully.")
     inputs = []

python/paddle/trainer_config_helpers/poolings.py

@@ -47,9 +47,14 @@ class MaxPooling(BasePoolingType):
     ..  math::
 
         max(samples\\_of\\_a\\_sequence)
+
+    :param output_max_index: True if output sequence max index instead of max
+                             value. None means use default value in proto.
+    :type output_max_index: bool|None
     """
-    def __init__(self):
+    def __init__(self, output_max_index=None):
         BasePoolingType.__init__(self, "max")
+        self.output_max_index = output_max_index
         
 
 class AvgPooling(BasePoolingType):

python/paddle/trainer_config_helpers/tests/CMakeLists.txt

@@ -3,3 +3,8 @@ add_test(NAME layers_test
   COMMAND ${PROJ_ROOT}/paddle/.set_python_path.sh -d ${PROJ_ROOT}/python/
         python ${PROJ_ROOT}/python/paddle/trainer_config_helpers/tests/layers_test.py
     WORKING_DIRECTORY ${PROJ_ROOT}/python/paddle)
+
+add_test(NAME test_layerHelpers
+  COMMAND
+  ${PROJ_ROOT}/python/paddle/trainer_config_helpers/tests/configs/run_tests.sh
+)

python/paddle/trainer_config_helpers/tests/configs/.gitignore

+*protostr

python/paddle/trainer_config_helpers/tests/configs/check.md5

+7e6919d17562516e9a1d9a88de1fb3b9  img_layers.protostr
+a5d9259ff1fd7ca23d0ef090052cb1f2  last_first_seq.protostr
+9c038249ec8ff719753a746cdb04c026  layer_activations.protostr
+5913f87b39cee3b2701fa158270aca26  projections.protostr
+6b39e34beea8dfb782bee9bd3dea9eb5  simple_rnn_layers.protostr
+0fc1409600f1a3301da994ab9d28b0bf  test_cost_layers.protostr
+144bc6d3a509de74115fa623741797ed  test_expand_layer.protostr
+2378518bdb71e8c6e888b1842923df58  test_fc.protostr
+8bb44e1e5072d0c261572307e7672bda  test_grumemory_layer.protostr
+1f3510672dce7a9ed25317fc58579ac7  test_hsigmoid.protostr
+d350bd91a0dc13e854b1364c3d9339c6  test_lstmemory_layer.protostr
+251a948ba41c1071afcd3d9cf9c233f7  test_ntm_layers.protostr
+e6ff04e70aea27c7b06d808cc49c9497  test_print_layer.protostr
+2a75dd33b640c49a8821c2da6e574577  test_rnn_group.protostr
+67d6fde3afb54f389d0ce4ff14726fe1  test_sequence_pooling.protostr
+f586a548ef4350ba1ed47a81859a64cb  unused_layers.protostr
+8122477f4f65244580cec09edc590041  util_layers.protostr

python/paddle/trainer_config_helpers/tests/configs/generate_protostr.sh

+#!/bin/bash
+
+set -e
+cd `dirname $0`
+export PYTHONPATH=$PWD/../../../../
+
+configs=(test_fc layer_activations projections test_print_layer
+test_sequence_pooling test_lstmemory_layer test_grumemory_layer
+last_first_seq test_expand_layer test_ntm_layers test_hsigmoid
+img_layers util_layers simple_rnn_layers unused_layers test_cost_layers
+test_rnn_group)
+
+
+for conf in ${configs[*]}
+do
+    echo "Generating " $conf
+    python -m paddle.utils.dump_config $conf.py > $conf.protostr
+done

python/paddle/trainer_config_helpers/tests/configs/img_layers.py

+from paddle.trainer_config_helpers import *
+
+settings(
+    learning_rate=1e-3,
+    batch_size=1000
+)
+
+img = data_layer(name='image', size=256*256)
+
+img_conv = img_conv_layer(input=img, num_channels=1, num_filters=64,
+                          filter_size=(32, 64), padding=(1, 0), stride=(1, 1),
+                          act=LinearActivation())
+img_bn = batch_norm_layer(input=img_conv, act=ReluActivation())
+
+img_norm = img_cmrnorm_layer(input=img_bn, size=32)
+
+img_pool = img_pool_layer(input=img_conv, pool_size=32, pool_type=MaxPooling())
+
+
+outputs(img_pool, img_norm)
\ No newline at end of file

python/paddle/trainer_config_helpers/tests/configs/last_first_seq.py

+from paddle.trainer_config_helpers import *
+
+settings(
+    batch_size=1000,
+    learning_rate=1e-5
+)
+
+din = data_layer(name='data', size=30)
+
+seq_op = [
+    first_seq,
+    last_seq
+]
+
+agg_level = [
+    AggregateLevel.EACH_SEQUENCE,
+    AggregateLevel.EACH_TIMESTEP
+]
+
+opts = []
+
+for op in seq_op:
+    for al in agg_level:
+        opts.append(op(input=din, agg_level=al))
+
+outputs(opts)
\ No newline at end of file

python/paddle/trainer_config_helpers/tests/configs/layer_activations.py

+'''
+Test all activations.
+'''
+
+from paddle.trainer_config_helpers import *
+
+settings(
+    learning_rate=1e-4,
+    batch_size=1000
+)
+
+din = data_layer(name='input', size=100)
+
+acts = [
+    TanhActivation, SigmoidActivation, SoftmaxActivation, IdentityActivation,
+    LinearActivation, ExpActivation, ReluActivation, BReluActivation,
+    SoftReluActivation, STanhActivation, AbsActivation, SquareActivation]
+
+outputs(
+    [fc_layer(input=din, size=100, act=act(), name="layer_%d" % i) for i, act in
+     enumerate(acts)])

python/paddle/trainer_config_helpers/tests/configs/projections.py

+'''
+Test mixed layer, projections and operators.
+'''
+from paddle.trainer_config_helpers import *
+
+settings(
+    batch_size=1000,
+    learning_rate=1e-4
+)
+
+din = data_layer(name='test', size=100)
+
+din = embedding_layer(input=din, size=256)
+
+with mixed_layer(size=100) as m1:
+    m1 += full_matrix_projection(input=din)
+
+with mixed_layer(size=100) as m2:
+    m2 += table_projection(input=m1)
+
+with mixed_layer(size=100) as m3:
+    m3 += identity_projection(input=m2)
+
+with mixed_layer(size=100) as m4:
+    m4 += dotmul_projection(input=m3)
+
+with mixed_layer() as m5:
+    m5 += context_projection(input=m4, context_len=3)
+
+with mixed_layer() as m6:
+    m6 += dotmul_operator(a=m3, b=m4)
+
+img = data_layer(name='img', size=32*32)
+flt = data_layer(name='filter', size=3*3*1*64)
+
+with mixed_layer() as m7:
+    m7 += conv_operator(img=img, filter=flt, num_filters=64,
+                        num_channel=1, filter_size=3)
+
+end = mixed_layer(input=[full_matrix_projection(input=m5),
+                         trans_full_matrix_projection(input=m6),
+                         full_matrix_projection(input=m7)],
+                  size=100,
+                  layer_attr=ExtraAttr(drop_rate=0.5,
+                                       error_clipping_threshold=40))
+
+outputs(end)

python/paddle/trainer_config_helpers/tests/configs/run_tests.sh

+#!/bin/bash
+cd `dirname $0`
+set -e
+./generate_protostr.sh
+md5sum -c check.md5

python/paddle/trainer_config_helpers/tests/configs/simple_rnn_layers.py

+from paddle.trainer_config_helpers import *
+
+settings(
+    batch_size=1000,
+    learning_rate=1e-4
+)
+
+din = data_layer(name='data', size=200)
+
+hidden = fc_layer(input=din, size=200, act=SigmoidActivation())
+
+rnn = recurrent_layer(input=hidden, act=SigmoidActivation())
+
+rnn2 = recurrent_layer(input=hidden, act=SigmoidActivation(), reverse=True)
+
+lstm1_param = fc_layer(input=hidden, size=200*4, act=LinearActivation(),
+                       bias_attr=False)
+
+lstm1 = lstmemory(input=lstm1_param, act=SigmoidActivation())
+
+lstm2_param = fc_layer(input=hidden, size=200*4, act=LinearActivation(),
+                       bias_attr=False)
+
+lstm2 = lstmemory(input=lstm2_param, act=SigmoidActivation(), reverse=True)
+
+gru1_param = fc_layer(input=hidden, size=200*3, act=LinearActivation(),
+                      bias_attr=False)
+gru1 = grumemory(input=gru1_param, act=SigmoidActivation())
+
+gru2_param = fc_layer(input=hidden, size=200*3, act=LinearActivation(),
+                      bias_attr=False)
+gru2 = grumemory(input=gru2_param, act=SigmoidActivation(), reverse=True)
+
+outputs(last_seq(input=rnn), first_seq(input=rnn2),
+        last_seq(input=lstm1), first_seq(input=lstm2),
+        last_seq(input=gru1), first_seq(gru2))

python/paddle/trainer_config_helpers/tests/configs/test_cost_layers.py

+from paddle.trainer_config_helpers import *
+
+settings(
+    learning_rate=1e-4,
+    batch_size=1000
+)
+
+seq_in = data_layer(name='input', size=200)
+labels = data_layer(name='labels', size=5000)
+
+probs = data_layer(name='probs', size=10)
+xe_label = data_layer(name='xe-label', size=10)
+
+outputs(ctc_layer(input=seq_in, label=labels),
+        crf_layer(input=fc_layer(input=seq_in, size=4),
+                  label=data_layer(name='crf_label', size=4)),
+        rank_cost(left=data_layer(name='left', size=1),
+                  right=data_layer(name='right', size=1),
+                  label=data_layer(name='label', size=1)),
+        lambda_cost(input=data_layer(name='list_feature', size=100),
+                    score=data_layer(name='list_scores', size=1)),
+        cross_entropy(input=probs, label=xe_label),
+        cross_entropy_with_selfnorm(input=probs, label=xe_label),
+        huber_cost(input=data_layer(name='huber_probs', size=1),
+                   label=data_layer(name='huber_label', size=1)),
+        multi_binary_label_cross_entropy(input=probs, label=xe_label))

python/paddle/trainer_config_helpers/tests/configs/test_expand_layer.py

+from paddle.trainer_config_helpers import *
+
+settings(
+    batch_size=1000,
+    learning_rate=1e-5
+)
+
+din = data_layer(name='data', size=30)
+data_seq = data_layer(name='data_seq', size=30)
+
+outputs(expand_layer(input=din, expand_as=data_seq,
+                     expand_level=ExpandLevel.FROM_SEQUENCE),
+        expand_layer(input=din, expand_as=data_seq,
+                     expand_level=ExpandLevel.FROM_TIMESTEP))

python/paddle/trainer_config_helpers/tests/configs/test_fc.py

+from paddle.trainer_config_helpers import *
+
+settings(
+    batch_size=1000,
+    learning_rate=1e-5
+)
+
+din = data_layer(name='data', size=100)
+
+trans = trans_layer(input=din)
+
+hidden = fc_layer(input=trans, size=100,
+                  bias_attr=False)
+
+mask = data_layer(name='mask', size=100)
+
+hidden_sel = selective_fc_layer(input=din, select=mask, size=100,
+                                act=SigmoidActivation())
+
+outputs(hidden, hidden_sel)

python/paddle/trainer_config_helpers/tests/configs/test_grumemory_layer.py

+from paddle.trainer_config_helpers import *
+
+settings(
+    batch_size=1000,
+    learning_rate=1e-4
+)
+
+din = data_layer(name='data', size=120)
+
+outputs(grumemory(input=din, size=40, reverse=True, gate_act=TanhActivation(),
+                  act=SigmoidActivation()))

python/paddle/trainer_config_helpers/tests/configs/test_hsigmoid.py

+from paddle.trainer_config_helpers import *
+
+settings(
+    learning_rate=1e-4,
+    batch_size=1000
+)
+
+din = data_layer(name='data', size=100)
+label = data_layer(name='label', size=10)
+
+outputs(hsigmoid(input=din, label=label, num_classes=10))
\ No newline at end of file

python/paddle/trainer_config_helpers/tests/configs/test_lstmemory_layer.py

+from paddle.trainer_config_helpers import *
+
+settings(
+    batch_size=1000,
+    learning_rate=1e-5
+)
+
+din = data_layer(name='data', size=128)
+
+outputs(lstmemory(input=din, reverse=True, gate_act=TanhActivation(),
+                  act=TanhActivation(), size=32))

python/paddle/trainer_config_helpers/tests/configs/test_ntm_layers.py

+from paddle.trainer_config_helpers import *
+
+settings(
+    batch_size=1000,
+    learning_rate=1e-5
+)
+
+weight = data_layer(name='w', size=1)
+a = data_layer(name='a', size=100)
+b = data_layer(name='b', size=100)
+c = data_layer(name='c', size=200)
+d = data_layer(name='d', size=31)
+
+outputs(interpolation_layer(input=[a, b], weight=weight),
+        power_layer(input=a, weight=weight),
+        scaling_layer(input=a, weight=weight),
+        cos_sim(a=a, b=b),
+        cos_sim(a=a, b=c, size=2),
+        sum_to_one_norm_layer(input=a),
+        conv_shift_layer(a=a, b=d),
+        tensor_layer(a=a, b=b, size=1000),
+        slope_intercept_layer(input=a, slope=0.7, intercept=0.9),
+        linear_comb_layer(weights=b, vectors=c))

python/paddle/trainer_config_helpers/tests/configs/test_print_layer.py

+from paddle.trainer_config_helpers import *
+
+settings(
+    learning_rate=1e-4,
+    batch_size=1000
+)
+
+din = data_layer(name='input', size=100)
+
+print_layer(input=din)
+
+outputs(din)

python/paddle/trainer_config_helpers/tests/configs/test_rnn_group.py

+from paddle.trainer_config_helpers import *
+
+settings(
+    learning_rate=1e-4,
+    batch_size=1000
+)
+
+seq = data_layer(name='seq_input', size=100)
+sub_seq = data_layer(name='sub_seq_input', size=100)
+lbl = data_layer(name='label', size=1)
+
+
+def generate_rnn_simple(name):
+    def rnn_simple(s):
+        m = memory(name=name, size=200)
+        fc = fc_layer(input=[s, m], size=200, name=name)
+        return fc
+
+    return rnn_simple
+
+
+with mixed_layer() as lstm_param:  # test lstm unit, rnn group
+    lstm_param += full_matrix_projection(input=seq, size=100 * 4)
+
+with mixed_layer() as gru_param:
+    gru_param += full_matrix_projection(input=seq, size=100 * 3)
+
+outputs(last_seq(input=recurrent_group(step=generate_rnn_simple('rnn_forward'),
+                                       input=seq)),
+        first_seq(input=recurrent_group(step=generate_rnn_simple('rnn_back'),
+                                        input=seq, reverse=True)),
+        last_seq(input=recurrent_group(step=generate_rnn_simple(
+            'rnn_subseq_forward'), input=SubsequenceInput(input=sub_seq))),
+        last_seq(input=lstmemory_group(input=lstm_param, size=100)),
+        last_seq(input=gru_group(input=gru_param, size=100)))

python/paddle/trainer_config_helpers/tests/configs/test_sequence_pooling.py

+from paddle.trainer_config_helpers import *
+
+settings(
+    learning_rate=1e-4,
+    batch_size=1000
+)
+
+din = data_layer(name='dat_in', size=100)
+
+POOL_TYPE = [
+    MaxPooling,
+    AvgPooling,
+    SumPooling
+]
+
+AGG_LEVEL = [
+    AggregateLevel.EACH_SEQUENCE,
+    AggregateLevel.EACH_TIMESTEP
+]
+
+opts = []
+
+for pt in POOL_TYPE:
+    for al in AGG_LEVEL:
+        opts.append(pooling_layer(input=din, agg_level=al, pooling_type=pt()))
+
+opts.append(pooling_layer(input=din,
+                          pooling_type=MaxPooling(output_max_index=True)))
+
+outputs(opts)

python/paddle/trainer_config_helpers/tests/configs/unused_layers.py

+from paddle.trainer_config_helpers import *
+settings(
+    batch_size=1000,
+    learning_rate=1e-4
+)
+
+probs = data_layer(name='probs', size=100)
+
+outputs(
+    sampling_id_layer(input=probs),  # It seems not support training
+
+    # It seems this layer is not correct, and should be rewrite.
+    # block_expand_layer(input=probs, channel=1, block_x=1, block_y=3),
+)
\ No newline at end of file

python/paddle/trainer_config_helpers/tests/configs/util_layers.py

+from paddle.trainer_config_helpers import *
+
+settings(learning_rate=1e-4, batch_size=1000)
+
+a = data_layer(name='a', size=10)
+b = data_layer(name='b', size=10)
+
+result = addto_layer(input=[a, b])
+concat1 = concat_layer(input=[a, b])
+concat2 = concat_layer(input=[
+    identity_projection(input=a),
+    identity_projection(input=b)
+])
+
+outputs(result, concat1, concat2)
\ No newline at end of file

python/paddle/trainer_config_helpers/tests/layers_test_config.py

@@ -47,7 +47,7 @@ print_layer(input=[out])
 
 outputs(classification_cost(out, data_layer(name="label", size=num_classes)))
 
-dotmul = mixed_layer(input=[dotmul_operator(x=x1, y=y1),
+dotmul = mixed_layer(input=[dotmul_operator(a=x1, b=x1),
                             dotmul_projection(input=y1)])
 
 proj_with_attr_init = mixed_layer(input=full_matrix_projection(input=y1,