Adding simple operators for v2 API

python/paddle/v2/__init__.py

@@ -27,6 +27,7 @@ from . import dataset
 from . import reader
 from . import plot
 import attr
+import op
 import pooling
 import inference
 import networks

python/paddle/v2/config_base.py

@@ -36,9 +36,9 @@ def __map_docstr__(doc, name):
     # xxx_layer to xxx
     doc = re.sub(r"(?P<name>[a-z]+)_layer", r"\g<name>", doc)
 
-    # XxxxActivation to paddle.v2.Activation.Xxxx
+    # XxxxActivation to paddle.v2.activation.Xxxx
     doc = re.sub(r"(?P<name>[A-Z][a-zA-Z]+)Activation",
-                 r"paddle.v2.Activation.\g<name>", doc)
+                 r"paddle.v2.activation.\g<name>", doc)
 
     # xxx_evaluator to paddle.v2.evaluator.xxx
     doc = re.sub(r"(?P<name>[a-z]+)_evaluator", r"evaluator.\g<name>", doc)

python/paddle/v2/op.py

@@ -0,0 +1,120 @@
+# Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserved
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import layer
+import activation as act
+from config_base import Layer
+from paddle.trainer_config_helpers.attrs import is_compatible_with
+from paddle.trainer_config_helpers.default_decorators import wrap_name_default
+
+__all__ = []
+
+
+def __register_unary_math_op__(op_name, act):
+    def op(input, name=None):
+        return layer.mixed(
+            input=[layer.identity_projection(input=input)], name=name, act=act)
+
+    op = wrap_name_default(op_name)(op)
+    op.__doc__ = type(act).__doc__
+    globals()[op_name] = op
+    __all__.append(op_name)
+
+
+__register_unary_math_op__('exp', act.Exp())
+__register_unary_math_op__('log', act.Log())
+__register_unary_math_op__('abs', act.Abs())
+__register_unary_math_op__('sigmoid', act.Sigmoid())
+__register_unary_math_op__('tanh', act.Tanh())
+__register_unary_math_op__('square', act.Square())
+__register_unary_math_op__('relu', act.Relu())
+__register_unary_math_op__('sqrt', act.Sqrt())
+__register_unary_math_op__('reciprocal', act.Reciprocal())
+__register_unary_math_op__('softmax', act.Softmax())
+
+
+def __add__(layeroutput, other):
+    if is_compatible_with(other, float):
+        return layer.slope_intercept(input=layeroutput, intercept=other)
+    if not isinstance(other, Layer):
+        raise TypeError("Layer can only be added with"
+                        " another Layer or a number")
+    if layeroutput.size == other.size:
+        return layer.mixed(input=[
+            layer.identity_projection(input=layeroutput),
+            layer.identity_projection(input=other)
+        ])
+    if other.size != 1 and layeroutput.size != 1:
+        raise TypeError("Two Layer can be added only if they have equal size"
+                        " or one of their sizes is 1. sizes are %s and %s" %
+                        (layeroutput.size, other.size))
+    elif layeroutput.size == 1:
+        tmp = layeroutput
+        layeroutput = other
+        other = tmp
+    other = layer.repeat(other, layeroutput.size)
+    return layer.mixed(input=[
+        layer.identity_projection(input=layeroutput),
+        layer.identity_projection(input=other)
+    ])
+
+
+Layer.__radd__ = __add__
+Layer.__add__ = __add__
+
+
+def __neg__(layeroutput):
+    return layer.slope_intercept(input=layeroutput, slope=-1.0)
+
+
+Layer.__neg__ = __neg__
+
+
+def __sub__(layeroutput, other):
+    if is_compatible_with(other, float):
+        return layer.slope_intercept(input=layeroutput, intercept=other)
+    if not isinstance(other, Layer):
+        raise TypeError("Layer can only be subtracted with"
+                        " another Layeroutput or a number")
+    return __add__(layeroutput, -other)
+
+
+Layer.__sub__ = __sub__
+
+
+def __rsub__(layeroutput, other):
+    neg = layer.slope_intercept(input=layeroutput, slope=-1.0)
+    return __add__(neg, other)
+
+
+Layer.__rsub__ = __rsub__
+
+
+def __mul__(layeroutput, other):
+    if is_compatible_with(other, float):
+        return layer.slope_intercept(input=layeroutput, slope=other)
+    if not isinstance(other, Layer):
+        raise TypeError("Layer can only be multiplied with"
+                        " another Layer or a number")
+    elif layeroutput.size == 1:
+        return layer.scaling(input=other, weight=layeroutput)
+    elif other.size == 1:
+        return layer.scaling(input=layeroutput, weight=other)
+    else:
+        raise TypeError("At least one of the operand of '*' must be a number"
+                        " or a Layer with size=1")
+
+
+Layer.__mul__ = __mul__
+Layer.__rmul__ = __mul__

python/paddle/v2/tests/CMakeLists.txt

@@ -1,2 +1,2 @@
-add_python_test(test_v2_api test_data_feeder.py test_parameters.py
+add_python_test(test_v2_api test_data_feeder.py test_op.py test_parameters.py
 test_layer.py test_rnn_layer.py test_topology.py test_image.py)

python/paddle/v2/tests/test_op.py

@@ -0,0 +1,50 @@
+# Copyright PaddlePaddle contributors. All Rights Reserved
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import unittest
+
+import paddle.v2.data_type as data_type
+import paddle.v2.layer as layer
+import paddle.v2.op as op
+
+
+class OpTest(unittest.TestCase):
+    def test_op(self):
+        x = layer.data(name='data', type=data_type.dense_vector(128))
+        x = op.exp(x)
+        x = op.sqrt(x)
+        x = op.reciprocal(x)
+        x = op.log(x)
+        x = op.abs(x)
+        x = op.sigmoid(x)
+        x = op.tanh(x)
+        x = op.square(x)
+        x = op.relu(x)
+        y = 1 + x
+        y = y + 1
+        y = x + y
+        y = y - x
+        y = y - 2
+        y = 2 - y
+        y = 2 * y
+        y = y * 3
+        z = layer.data(name='data_2', type=data_type.dense_vector(1))
+        y = y * z
+        y = z * y
+        y = y + z
+        y = z + y
+        print layer.parse_network(y)
+
+
+if __name__ == '__main__':
+    unittest.main()