!9129 support abs() and mean() method for Tensor object

From: @bairongz
Reviewed-by: 
Signed-off-by:

mindspore/_extends/parse/standard_method.py

@@ -30,6 +30,27 @@ trans = P.Transpose()
 shape_ = P.Shape()
 reshape_ = P.Reshape()
 dtype_ = P.DType()
+abs_ = P.Abs()
+
+def mean(x, axis=(), keep_dims=False):
+    """
+    Reduce a dimension of a tensor by averaging all elements in the dimension.
+
+    Args:
+        axis (Union[None, int, tuple(int)]): Dimensions of reduction,
+            when axis is None or empty tuple, reduce all dimensions.
+            Default: (), reduce all dimensions.
+        keep_dims (bool): Whether to keep the reduced dimensions.
+            Default : False, don't keep these reduced dimensions.
+
+    Returns:
+        Tensor, has the same data type as x.
+    """
+    if axis is None:
+        axis = ()
+    reduce_mean = P.ReduceMean(keep_dims)
+    return reduce_mean(x, axis)
+
 
 def all_(x, axis=(), keep_dims=False):
     """

mindspore/ccsrc/pipeline/jit/resource.cc

@@ -152,6 +152,8 @@ BuiltInTypeMap &GetMethodMap() {
                                          {"__add__", std::string("add")},                 // C.add
                                          {"__sub__", std::string("sub")},                 // C.sub
                                          {"__mul__", std::string("mul")},                 // C.mul
+                                         {"abs", std::string("abs_")},                    // C.abs_
+                                         {"mean", std::string("mean")},                   // C.mean
                                          {"__truediv__", std::string("truediv")},         // C.truediv
                                          {"__floordiv__", std::string("floordiv")},       // C.floordiv
                                          {"__mod__", std::string("mod")},                 // C.mod

mindspore/common/tensor.py

@@ -325,6 +325,35 @@ class Tensor(Tensor_):
         return tensor_operator_registry.get('broadcast_to')(x.shape)(self)
 
 
+    def abs(self):
+        """
+        Return absolute value element-wisely.
+
+        Returns:
+            Tensor, has the same data type as x.
+        """
+        return tensor_operator_registry.get('abs')()(self)
+
+
+    def mean(self, axis=(), keep_dims=False):
+        """
+        Reduce a dimension of a tensor by averaging all elements in the dimension.
+
+        Args:
+            axis (Union[None, int, tuple(int)]): Dimensions of reduction,
+                when axis is None or empty tuple, reduce all dimensions.
+                Default: (), reduce all dimensions.
+            keep_dims (bool): Whether to keep the reduced dimensions.
+                Default : False, don't keep these reduced dimensions.
+
+        Returns:
+            Tensor, has the same data type as x.
+        """
+        if axis is None:
+            axis = ()
+        return tensor_operator_registry.get('mean')(keep_dims)(self, axis)
+
+
 class RowTensor:
     """
     A sparse representation of a set of tensor slices at given indices.

mindspore/ops/functional.py

@@ -173,6 +173,8 @@ tensor_operator_registry.register('__pow__', tensor_pow)
 tensor_operator_registry.register('__floordiv__', tensor_floordiv)
 tensor_operator_registry.register('all', P.ReduceAll)
 tensor_operator_registry.register('any', P.ReduceAny)
+tensor_operator_registry.register('abs', P.Abs)
+tensor_operator_registry.register('mean', P.ReduceMean)
 tensor_operator_registry.register('reshape', P.Reshape)
 tensor_operator_registry.register('broadcast_to', P.BroadcastTo)
 # ms cannot support Tensor(True) compare

tests/ut/python/pipeline/parse/test_abs.py

@@ -0,0 +1,46 @@
+# Copyright 2020 Huawei Technologies Co., Ltd
+#
+# 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.
+# ============================================================================
+""" test_abs """
+import mindspore as ms
+from mindspore import nn
+from mindspore import context
+
+context.set_context(mode=context.GRAPH_MODE)
+
+
+def test_abs():
+    class Net(nn.Cell):
+        def __init__(self):
+            super(Net, self).__init__()
+            self.value = ms.Tensor([1, -2, 3])
+
+        def construct(self):
+            return self.value.abs()
+
+    net = Net()
+    net()
+
+
+def test_abs_parameter():
+    class Net(nn.Cell):
+        def __init__(self):
+            super(Net, self).__init__()
+
+        def construct(self, x):
+            return x.abs()
+
+    net = Net()
+    x = ms.Tensor([1, -2, 3])
+    net(x)

tests/ut/python/pipeline/parse/test_mean.py

@@ -0,0 +1,72 @@
+# Copyright 2020 Huawei Technologies Co., Ltd
+#
+# 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.
+# ============================================================================
+""" test_mean """
+import mindspore as ms
+from mindspore import nn
+from mindspore import context
+
+context.set_context(mode=context.GRAPH_MODE)
+
+
+def test_mean():
+    class Net(nn.Cell):
+        def __init__(self):
+            super().__init__()
+            self.value = ms.Tensor([[1, 2, 3], [4, 5, 6]], dtype=ms.float32)
+
+        def construct(self):
+            return self.value.mean()
+
+    net = Net()
+    net()
+
+
+def test_mean_axis():
+    class Net(nn.Cell):
+        def __init__(self):
+            super().__init__()
+            self.value = ms.Tensor([[1, 2, 3], [4, 5, 6]], dtype=ms.float32)
+
+        def construct(self):
+            return self.value.mean(axis=1)
+
+    net = Net()
+    net()
+
+
+def test_mean_parameter():
+    class Net(nn.Cell):
+        def __init__(self):
+            super().__init__()
+
+        def construct(self, x):
+            return x.mean()
+
+    x = ms.Tensor([[1, 2, 3], [1, 2, 3]], dtype=ms.float32)
+    net = Net()
+    net(x)
+
+
+def test_mean_parameter_axis():
+    class Net(nn.Cell):
+        def __init__(self):
+            super().__init__()
+
+        def construct(self, x):
+            return x.mean(axis=1)
+
+    x = ms.Tensor([[1, 2, 3], [1, 2, 3]], dtype=ms.float32)
+    net = Net()
+    net(x)