remove lrn which is not used in paddle 2.0 (#47945)

python/paddle/fluid/layers/nn.py

@@ -104,7 +104,6 @@ __all__ = [
     'unsqueeze',
     'lod_reset',
     'lod_append',
-    'lrn',
     'pad',
     'label_smooth',
     'roi_pool',
@@ -6831,103 +6830,6 @@ def lod_append(x, level):
     return out
 
 
-def lrn(
-    input, n=5, k=1.0, alpha=1e-4, beta=0.75, name=None, data_format='NCHW'
-):
-    r"""
-    :alias_main: paddle.nn.functional.lrn
-        :alias: paddle.nn.functional.lrn,paddle.nn.functional.norm.lrn
-        :old_api: paddle.fluid.layers.lrn
-
-    This operator implements the Local Response Normalization Layer.
-    This layer performs a type of "lateral inhibition" by normalizing over local input regions.
-    For more information, please refer to `ImageNet Classification with Deep Convolutional Neural Networks <https://papers.nips.cc/paper/4824-imagenet-classification-with-deep-convolutional-neural-networks.pdf>`_
-
-    The formula is as follows:
-
-    .. math::
-
-        Output(i, x, y) = Input(i, x, y) / \\left(k + \\alpha \\sum\\limits^{\\min(C-1, i + n/2)}_{j = \\max(0, i - n/2)}(Input(j, x, y))^2\\right)^{\\beta}
-
-    In the above equation:
-
-    - :math:`n` : The number of channels to sum over.
-    - :math:`k` : The offset (avoid being divided by 0).
-    - :math:`\\alpha` : The scaling parameter.
-    - :math:`\\beta` : The exponent parameter.
-
-
-    Args:
-        input (Variable): Input feature, 4D-Tensor with the shape of [N,C,H,W] or [N, H, W, C],
-            where N is the batch size, C is the input channel, H is Height, W is weight. The data
-            type is float32. The rank of this tensor must be 4, otherwise it will raise ValueError.
-        n (int, optional): The number of channels to sum over. Default: 5
-        k (float, optional): An offset, positive. Default: 1.0
-        alpha (float, optional): The scaling parameter, positive. Default:1e-4
-        beta (float, optional): The exponent, positive. Default:0.75
-        name (str, optional): The default value is None. Normally there is no need for user to set
-            this property. For more information, please refer to :ref:`api_guide_Name`
-        data_format (str, optional): Specify the data format of the input, and the data format of the output
-            will be consistent with that of the input. An optional string from: `"NCHW"`, `"NHWC"`.
-            The default is `"NCHW"`. When it is `"NCHW"`, the data is stored in the order of:
-            `[batch_size, input_channels, input_height, input_width]`.
-
-    Returns:
-        Variable: A tensor variable storing the transformation result with the same shape and data type as input.
-
-
-    Examples:
-
-    .. code-block:: python
-
-        import paddle.fluid as fluid
-        data = fluid.data(
-            name="data", shape=[None, 3, 112, 112], dtype="float32")
-        lrn = fluid.layers.lrn(input=data)
-        print(lrn.shape)  # [-1, 3, 112, 112]
-        print(lrn.dtype)  # float32
-    """
-    helper = LayerHelper('lrn', **locals())
-    check_variable_and_dtype(input, 'input', ['float32'], 'lrn')
-    dtype = helper.input_dtype()
-    input_shape = input.shape
-    dims = len(input_shape)
-
-    if dims != 4:
-        raise ValueError(
-            "Input's dimension size of Op(lrn) must be 4, but received %d."
-            % (dims)
-        )
-    if data_format not in ['NCHW', 'NHWC']:
-        raise ValueError(
-            "Attr(data_format) of Op(lrn) got wrong value: received "
-            + data_format
-            + " but only NCHW or NHWC supported."
-        )
-
-    mid_out = helper.create_variable_for_type_inference(
-        dtype=dtype, stop_gradient=True
-    )
-    lrn_out = helper.create_variable_for_type_inference(dtype)
-    helper.append_op(
-        type="lrn",
-        inputs={"X": input},
-        outputs={
-            "Out": lrn_out,
-            "MidOut": mid_out,
-        },
-        attrs={
-            "n": n,
-            "k": k,
-            "alpha": alpha,
-            "beta": beta,
-            "data_format": data_format,
-        },
-    )
-
-    return lrn_out
-
-
 def pad(x, paddings, pad_value=0.0, name=None):
     r"""
     :alias_main: paddle.nn.functional.pad

python/paddle/fluid/tests/unittests/test_layers.py

@@ -3339,13 +3339,6 @@ class TestBook(LayerTest):
             )
             return layers.space_to_depth(data, 3)
 
-    def make_lrn(self):
-        with program_guard(
-            fluid.default_main_program(), fluid.default_startup_program()
-        ):
-            data = self._get_data(name='data', shape=[6, 2, 2], dtype='float32')
-            return layers.lrn(data)
-
     def make_get_places(self):
         with program_guard(
             fluid.default_main_program(), fluid.default_startup_program()

python/paddle/fluid/tests/unittests/test_lrn_op.py

@@ -106,56 +106,6 @@ class TestLRNOpAttrDataFormat(TestLRNOp):
         self.data_format = 'NHWC'
 
 
-class TestLRNAPI(unittest.TestCase):
-    def test_case(self):
-        data1 = fluid.data(name='data1', shape=[2, 4, 5, 5], dtype='float32')
-        data2 = fluid.data(name='data2', shape=[2, 5, 5, 4], dtype='float32')
-        out1 = fluid.layers.lrn(data1, data_format='NCHW')
-        out2 = fluid.layers.lrn(data2, data_format='NHWC')
-        data1_np = np.random.random((2, 4, 5, 5)).astype("float32")
-        data2_np = np.transpose(data1_np, [0, 2, 3, 1])
-
-        if core.is_compiled_with_cuda():
-            place = core.CUDAPlace(0)
-        else:
-            place = core.CPUPlace()
-        exe = fluid.Executor(place)
-        exe.run(fluid.default_startup_program())
-        results = exe.run(
-            fluid.default_main_program(),
-            feed={"data1": data1_np, "data2": data2_np},
-            fetch_list=[out1, out2],
-            return_numpy=True,
-        )
-
-        np.testing.assert_allclose(
-            results[0], np.transpose(results[1], (0, 3, 1, 2)), rtol=1e-05
-        )
-
-    def test_exception(self):
-        input1 = fluid.data(name="input1", shape=[2, 4, 5, 5], dtype="float32")
-        input2 = fluid.data(
-            name="input2", shape=[2, 4, 5, 5, 5], dtype="float32"
-        )
-
-        def _attr_data_fromat():
-            out = fluid.layers.lrn(input1, data_format='NDHW')
-
-        def _input_dim_size():
-            out = fluid.layers.lrn(input2)
-
-        self.assertRaises(ValueError, _attr_data_fromat)
-        self.assertRaises(ValueError, _input_dim_size)
-
-
-class TestLRNOpError(unittest.TestCase):
-    def test_errors(self):
-        with program_guard(Program(), Program()):
-            # the input must be float32
-            in_w = fluid.data(name="in_w", shape=[None, 3, 3, 3], dtype="int64")
-            self.assertRaises(TypeError, fluid.layers.lrn, in_w)
-
-
 class TestLocalResponseNormFAPI(unittest.TestCase):
     def setUp(self):
         np.random.seed(123)