remove step_input in recurrent_group step_input

python/paddle/trainer_config_helpers/layers.py

@@ -3042,7 +3042,8 @@ def recurrent_group(step,
                     reverse=False,
                     name=None,
                     targetInlink=None,
-                    is_generating=False):
+                    is_generating=False,
+                    in_args_converter=None):
     """
     Recurrent layer group is an extremely flexible recurrent unit in
     PaddlePaddle. As long as the user defines the calculation done within a
@@ -3185,7 +3186,10 @@ def recurrent_group(step,
 
     assert (is_generating != has_LayerOutput)
 
-    layer_outs = step(*in_args)
+    if in_args_converter is None:
+        layer_outs = step(*in_args)
+    else:
+        layer_outs = step(*in_args_converter(*in_args)).to_proto(dict())
 
     if isinstance(layer_outs, LayerOutput):
         layer_outs = [layer_outs]

python/paddle/v2/layer.py

@@ -73,8 +73,6 @@ from paddle.trainer_config_helpers.config_parser_utils import \
     parse_network_config as __parse__
 from paddle.trainer_config_helpers.default_decorators import wrap_name_default
 
-import activation
-import attr
 import data_type
 
 __all__ = [
@@ -101,11 +99,10 @@ def parse_network(*outputs):
 
 
 class Layer(object):
-    def __init__(self, name, parent_layers, step_input=None):
+    def __init__(self, name, parent_layers):
         assert isinstance(parent_layers, dict)
         assert isinstance(name, basestring)
         self.name = name
-        self.step_input = step_input
         self.__parent_layers__ = parent_layers
 
     def to_proto(self, context):
@@ -121,12 +118,13 @@ class Layer(object):
             else:
                 v1_layer = map(lambda x: x.to_proto(context=context),
                                self.__parent_layers__[layer_name])
-                if layer_name == "input" and self.step_input is not None:
-                    v1_layer.insert(0, self.step_input)
             kwargs[layer_name] = v1_layer
 
+        if self.name is None:
+            return self.to_proto_impl(**kwargs)
+
         # memory may have the same name with some layer
-        if isinstance(self, MemoryV2):
+        if isinstance(self, MemoryV2) or isinstance(self, LayerOutputV2):
             return self.to_proto_impl(**kwargs)
 
         if self.name not in context:
@@ -144,7 +142,7 @@ def __convert_to_v2__(method_name, name_prefix, parent_names):
         wrapper = None
 
     class V2LayerImpl(Layer):
-        def __init__(self, name=None, step_input=None, **kwargs):
+        def __init__(self, name=None, **kwargs):
             parent_layers = dict()
             other_kwargs = dict()
             for pname in parent_names:
@@ -155,7 +153,7 @@ def __convert_to_v2__(method_name, name_prefix, parent_names):
                 if key not in parent_names:
                     other_kwargs[key] = kwargs[key]
 
-            super(V2LayerImpl, self).__init__(name, parent_layers, step_input)
+            super(V2LayerImpl, self).__init__(name, parent_layers)
             self.__other_kwargs__ = other_kwargs
 
         if wrapper is not None:
@@ -214,6 +212,48 @@ class MemoryV2(Layer):
         return conf_helps.memory(name=self.name, size=self.size, **args)
 
 
+class LayerOutputV2(Layer):
+    def __init__(self, layer_output):
+        assert isinstance(layer_output, conf_helps.LayerOutput)
+        self.layer_output = layer_output
+        super(LayerOutputV2, self).__init__(
+            name=layer_output.name, parent_layers=dict())
+
+    def to_proto_impl(self):
+        return self.layer_output
+
+
+class RecurrentGroupV2(Layer):
+    def __init__(self, name, **kwargs):
+        self.__parent_names__ = ['input']
+        other_kwargs = dict()
+        parent_layers = dict()
+        for pname in self.__parent_names__:
+            if kwargs.has_key(pname):
+                parent_layers[pname] = kwargs[pname]
+        for key in kwargs.keys():
+            if key not in self.__parent_names__:
+                other_kwargs[key] = kwargs[key]
+        self.__kwargs__ = other_kwargs
+
+        super(RecurrentGroupV2, self).__init__(
+            name=name, parent_layers=parent_layers)
+
+    def to_proto_impl(self, **kwargs):
+        def in_args_converter(in_args):
+            if not isinstance(in_args, collections.Sequence):
+                in_args = [in_args]
+            return [LayerOutputV2(input) for input in in_args]
+
+        args = dict()
+        for each in kwargs:
+            args[each] = kwargs[each]
+        for each in self.__kwargs__:
+            args[each] = self.__kwargs__[each]
+        return conf_helps.recurrent_group(
+            name=self.name, in_args_converter=in_args_converter, **args)
+
+
 data = DataLayerV2
 fc = __convert_to_v2__('fc_layer', name_prefix='fc', parent_names=['input'])
 max_id = __convert_to_v2__(
@@ -234,8 +274,7 @@ embedding = __convert_to_v2__(
     'embedding_layer', name_prefix='embedding', parent_names=['input'])
 last_seq = __convert_to_v2__(
     'last_seq', name_prefix='last_seq', parent_names=['input'])
-recurrent_group = __convert_to_v2__(
-    'recurrent_group', name_prefix='recurrent_layer', parent_names=['input'])
+recurrent_group = RecurrentGroupV2
 memory = MemoryV2
 
 cross_entropy_with_selfnorm_cost = __convert_to_v2__(

python/paddle/v2/tests/test_layer.py

@@ -63,7 +63,7 @@ class RNNTest(unittest.TestCase):
         word_dim = 8
         hidden_dim = 8
 
-        def test_old_rnn():
+        def parse_old_rnn():
             def step(y):
                 mem = conf_helps.memory(name="rnn_state", size=hidden_dim)
                 out = conf_helps.fc_layer(
@@ -81,16 +81,15 @@ class RNNTest(unittest.TestCase):
 
             return str(parse_network(test))
 
-        def test_new_rnn():
+        def parse_new_rnn():
             def new_step(y):
                 mem = layer.memory(name="rnn_state", size=hidden_dim)
-                out = layer.fc(input=[mem],
-                               step_input=y,
+                out = layer.fc(input=[y, mem],
                                size=hidden_dim,
                                act=activation.Tanh(),
                                bias_attr=True,
                                name="rnn_state")
-                return out.to_proto(dict())
+                return out
 
             data1 = layer.data(
                 name="word", type=data_type.integer_value(dict_dim))
@@ -99,8 +98,8 @@ class RNNTest(unittest.TestCase):
                 name="rnn", step=new_step, input=embd)
             return str(layer.parse_network(rnn_layer))
 
-        diff = difflib.unified_diff(test_old_rnn().splitlines(1),
-                                    test_new_rnn().splitlines(1))
+        diff = difflib.unified_diff(parse_old_rnn().splitlines(1),
+                                    parse_new_rnn().splitlines(1))
         print ''.join(diff)