!21 update lenet , add alexnet in example

Merge pull request !21 from wukesong/add_lenet_alexnet

example/alexnet_cifar10/config.py

@@ -0,0 +1,32 @@
+# 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.
+# ============================================================================
+"""
+network config setting, will be used in train.py
+"""
+
+from easydict import EasyDict as edict
+
+alexnet_cfg = edict({
+    'num_classes': 10,
+    'learning_rate': 0.002,
+    'momentum': 0.9,
+    'epoch_size': 1,
+    'batch_size': 32,
+    'buffer_size': 1000,
+    'image_height': 227,
+    'image_width': 227,
+    'save_checkpoint_steps': 1562,
+    'keep_checkpoint_max': 10,
+})

example/alexnet_cifar10/dataset.py

@@ -0,0 +1,54 @@
+# 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.
+# ============================================================================
+"""
+Produce the dataset
+"""
+
+from config import alexnet_cfg as cfg
+import mindspore.dataset as ds
+import mindspore.dataset.transforms.c_transforms as C
+import mindspore.dataset.transforms.vision.c_transforms as CV
+from mindspore.common import dtype as mstype
+
+
+def create_dataset(data_path, batch_size=32, repeat_size=1, status="train"):
+    """
+    create dataset for train or test
+    """
+    cifar_ds = ds.Cifar10Dataset(data_path)
+    rescale = 1.0 / 255.0
+    shift = 0.0
+
+    resize_op = CV.Resize((cfg.image_height, cfg.image_width))
+    rescale_op = CV.Rescale(rescale, shift)
+    normalize_op = CV.Normalize((0.4914, 0.4822, 0.4465), (0.2023, 0.1994, 0.2010))
+    if status == "train":
+        random_crop_op = CV.RandomCrop([32, 32], [4, 4, 4, 4])
+        random_horizontal_op = CV.RandomHorizontalFlip()
+    channel_swap_op = CV.HWC2CHW()
+    typecast_op = C.TypeCast(mstype.int32)
+    cifar_ds = cifar_ds.map(input_columns="label", operations=typecast_op)
+    if status == "train":
+        cifar_ds = cifar_ds.map(input_columns="image", operations=random_crop_op)
+        cifar_ds = cifar_ds.map(input_columns="image", operations=random_horizontal_op)
+    cifar_ds = cifar_ds.map(input_columns="image", operations=resize_op)
+    cifar_ds = cifar_ds.map(input_columns="image", operations=rescale_op)
+    cifar_ds = cifar_ds.map(input_columns="image", operations=normalize_op)
+    cifar_ds = cifar_ds.map(input_columns="image", operations=channel_swap_op)
+
+    cifar_ds = cifar_ds.shuffle(buffer_size=cfg.buffer_size)
+    cifar_ds = cifar_ds.batch(batch_size, drop_remainder=True)
+    cifar_ds = cifar_ds.repeat(repeat_size)
+    return cifar_ds

example/alexnet_cifar10/eval.py

@@ -0,0 +1,58 @@
+# 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.
+# ============================================================================
+"""
+######################## eval alexnet example ########################
+eval alexnet according to model file:
+python eval.py --data_path /YourDataPath --ckpt_path Your.ckpt
+"""
+
+import argparse
+from config import alexnet_cfg as cfg
+from dataset import create_dataset
+import mindspore.nn as nn
+from mindspore import context
+from mindspore.model_zoo.alexnet import AlexNet
+from mindspore.train.serialization import load_checkpoint, load_param_into_net
+from mindspore.train import Model
+from mindspore.nn.metrics import Accuracy
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description='MindSpore AlexNet Example')
+    parser.add_argument('--device_target', type=str, default="Ascend", choices=['Ascend', 'GPU'],
+                        help='device where the code will be implemented (default: Ascend)')
+    parser.add_argument('--data_path', type=str, default="./", help='path where the dataset is saved')
+    parser.add_argument('--ckpt_path', type=str, default="./ckpt", help='if is test, must provide\
+                        path where the trained ckpt file')
+    parser.add_argument('--dataset_sink_mode', type=bool, default=False, help='dataset_sink_mode is False or True')
+    args = parser.parse_args()
+
+    context.set_context(mode=context.GRAPH_MODE, device_target=args.device_target, enable_mem_reuse=False)
+
+    network = AlexNet(cfg.num_classes)
+    loss = nn.SoftmaxCrossEntropyWithLogits(is_grad=False, sparse=True, reduction="mean")
+    repeat_size = cfg.epoch_size
+    opt = nn.Momentum(network.trainable_params(), cfg.learning_rate, cfg.momentum)
+    model = Model(network, loss, opt, metrics={"Accuracy": Accuracy()})  # test
+
+    print("============== Starting Testing ==============")
+    param_dict = load_checkpoint(args.ckpt_path)
+    load_param_into_net(network, param_dict)
+    ds_eval = create_dataset(args.data_path,
+                             cfg.batch_size,
+                             1,
+                             "test")
+    acc = model.eval(ds_eval, dataset_sink_mode=args.dataset_sink_mode)
+    print("============== Accuracy:{} ==============".format(acc))

example/alexnet_cifar10/train.py

@@ -0,0 +1,58 @@
+# 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.
+# ============================================================================
+"""
+######################## train alexnet example ########################
+train alexnet and get network model files(.ckpt) :
+python train.py --data_path /YourDataPath
+"""
+
+import argparse
+from config import alexnet_cfg as cfg
+from dataset import create_dataset
+import mindspore.nn as nn
+from mindspore import context
+from mindspore.train import Model
+from mindspore.nn.metrics import Accuracy
+from mindspore.model_zoo.alexnet import AlexNet
+from mindspore.train.callback import ModelCheckpoint, CheckpointConfig, LossMonitor
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description='MindSpore AlexNet Example')
+    parser.add_argument('--device_target', type=str, default="Ascend", choices=['Ascend', 'GPU'],
+                        help='device where the code will be implemented (default: Ascend)')
+    parser.add_argument('--data_path', type=str, default="./", help='path where the dataset is saved')
+    parser.add_argument('--ckpt_path', type=str, default="./ckpt", help='if is test, must provide\
+                        path where the trained ckpt file')
+    parser.add_argument('--dataset_sink_mode', type=bool, default=False, help='dataset_sink_mode is False or True')
+    args = parser.parse_args()
+
+    context.set_context(mode=context.GRAPH_MODE, device_target=args.device_target, enable_mem_reuse=False)
+
+    network = AlexNet(cfg.num_classes)
+    loss = nn.SoftmaxCrossEntropyWithLogits(is_grad=False, sparse=True, reduction="mean")
+    opt = nn.Momentum(network.trainable_params(), cfg.learning_rate, cfg.momentum)
+    model = Model(network, loss, opt, metrics={"Accuracy": Accuracy()})  # test
+
+    print("============== Starting Training ==============")
+    ds_train = create_dataset(args.data_path,
+                              cfg.batch_size,
+                              cfg.epoch_size,
+                              "train")
+    config_ck = CheckpointConfig(save_checkpoint_steps=cfg.save_checkpoint_steps,
+                                 keep_checkpoint_max=cfg.keep_checkpoint_max)
+    ckpoint_cb = ModelCheckpoint(prefix="checkpoint_alexnet", directory=args.ckpt_path, config=config_ck)
+    model.train(cfg.epoch_size, ds_train, callbacks=[ckpoint_cb, LossMonitor()],
+                dataset_sink_mode=args.dataset_sink_mode)

example/lenet/main.py

@@ -1,125 +0,0 @@
-# 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.
-# ============================================================================
-"""
-######################## train and test lenet example ########################
-1. train lenet and get network model files(.ckpt) :
-python main.py --data_path /home/workspace/mindspore_dataset/Tutorial_Network/Lenet/MNIST_Data
-
-2. test lenet according to model file:
-python main.py --data_path /home/workspace/mindspore_dataset/Tutorial_Network/Lenet/MNIST_Data
-               --mode test --ckpt_path checkpoint_lenet_1-1_1875.ckpt
-"""
-import os
-import argparse
-from config import mnist_cfg as cfg
-
-import mindspore.dataengine as de
-import mindspore.nn as nn
-from mindspore.model_zoo.lenet import LeNet5
-from mindspore import context, Tensor
-from mindspore.train.serialization import load_checkpoint, load_param_into_net
-from mindspore.train.callback import ModelCheckpoint, CheckpointConfig, LossMonitor
-from mindspore.train import Model
-import mindspore.ops.operations as P
-import mindspore.transforms.c_transforms as C
-from mindspore.transforms import Inter
-from mindspore.nn.metrics import Accuracy
-from mindspore.ops import functional as F
-from mindspore.common import dtype as mstype
-
-
-class CrossEntropyLoss(nn.Cell):
-    """
-    Define loss for network
-    """
-    def __init__(self):
-        super(CrossEntropyLoss, self).__init__()
-        self.cross_entropy = P.SoftmaxCrossEntropyWithLogits()
-        self.mean = P.ReduceMean()
-        self.one_hot = P.OneHot()
-        self.on_value = Tensor(1.0, mstype.float32)
-        self.off_value = Tensor(0.0, mstype.float32)
-
-    def construct(self, logits, label):
-        label = self.one_hot(label, F.shape(logits)[1], self.on_value, self.off_value)
-        loss = self.cross_entropy(logits, label)[0]
-        loss = self.mean(loss, (-1,))
-        return loss
-
-def create_dataset(data_path, batch_size=32, repeat_size=1,
-                   num_parallel_workers=1):
-    """
-    create dataset for train or test
-    """
-    # define dataset
-    ds1 = de.MnistDataset(data_path)
-
-    # apply map operations on images
-    ds1 = ds1.map(input_columns="label", operations=C.TypeCast(mstype.int32))
-    ds1 = ds1.map(input_columns="image", operations=C.Resize((cfg.image_height, cfg.image_width),
-                                                             interpolation=Inter.LINEAR),
-                  num_parallel_workers=num_parallel_workers)
-    ds1 = ds1.map(input_columns="image", operations=C.Rescale(1 / 0.3081, -1 * 0.1307 / 0.3081),
-                  num_parallel_workers=num_parallel_workers)
-    ds1 = ds1.map(input_columns="image", operations=C.Rescale(1.0 / 255.0, 0.0),
-                  num_parallel_workers=num_parallel_workers)
-    ds1 = ds1.map(input_columns="image", operations=C.HWC2CHW(), num_parallel_workers=num_parallel_workers)
-
-    # apply DatasetOps
-    ds1 = ds1.shuffle(buffer_size=cfg.buffer_size)  # 10000 as in LeNet train script
-    ds1 = ds1.batch(batch_size, drop_remainder=True)
-    ds1 = ds1.repeat(repeat_size)
-
-    return ds1
-
-if __name__ == "__main__":
-    parser = argparse.ArgumentParser(description='MindSpore MNIST Example')
-    parser.add_argument('--device_target', type=str, default="Ascend", choices=['Ascend', 'GPU', 'CPU'],
-                        help='device where the code will be implemented (default: Ascend)')
-    parser.add_argument('--mode', type=str, default="train", choices=['train', 'test'],
-                        help='implement phase, set to train or test')
-    parser.add_argument('--data_path', type=str, default="./MNIST_Data",
-                        help='path where the dataset is saved')
-    parser.add_argument('--ckpt_path', type=str, default="", help='if mode is test, must provide\
-                        path where the trained ckpt file')
-
-    args = parser.parse_args()
-
-    context.set_context(mode=context.GRAPH_MODE, device_target=args.device_target)
-
-    network = LeNet5(cfg.num_classes)
-    network.set_train()
-    # net_loss = nn.SoftmaxCrossEntropyWithLogits()  # support this loss soon
-    net_loss = CrossEntropyLoss()
-    net_opt = nn.Momentum(network.trainable_params(), cfg.lr, cfg.momentum)
-    config_ck = CheckpointConfig(save_checkpoint_steps=cfg.save_checkpoint_steps,
-                                 keep_checkpoint_max=cfg.keep_checkpoint_max)
-    ckpoint_cb = ModelCheckpoint(prefix="checkpoint_lenet", config=config_ck)
-    model = Model(network, net_loss, net_opt, metrics={"Accuracy": Accuracy()})
-
-    if args.mode == 'train':  # train
-        ds = create_dataset(os.path.join(args.data_path, args.mode), batch_size=cfg.batch_size,
-                            repeat_size=cfg.epoch_size)
-        print("============== Starting Training ==============")
-        model.train(cfg['epoch_size'], ds, callbacks=[ckpoint_cb, LossMonitor()], dataset_sink_mode=False)
-    elif args.mode == 'test':  # test
-        print("============== Starting Testing ==============")
-        param_dict = load_checkpoint(args.ckpt_path)
-        load_param_into_net(network, param_dict)
-        ds_eval = create_dataset(os.path.join(args.data_path, "test"), 32, 1)
-        acc = model.eval(ds_eval, dataset_sink_mode=False)
-        print("============== Accuracy:{} ==============".format(acc))
-    else:
-        raise RuntimeError('mode should be train or test, rather than {}'.format(args.mode))

example/lenet_mnist/config.py

@@ -13,8 +13,9 @@
 # limitations under the License.
 # ============================================================================
 """
-network config setting, will be used in main.py
+network config setting, will be used in train.py
 """
+
 from easydict import EasyDict as edict
 
 mnist_cfg = edict({
@@ -23,7 +24,6 @@ mnist_cfg = edict({
     'momentum': 0.9,
     'epoch_size': 1,
     'batch_size': 32,
-    'repeat_size': 1,
     'buffer_size': 1000,
     'image_height': 32,
     'image_width': 32,

example/lenet_mnist/dataset.py

@@ -0,0 +1,60 @@
+# 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.
+# ============================================================================
+"""
+Produce the dataset
+"""
+
+import mindspore.dataset as ds
+import mindspore.dataset.transforms.vision.c_transforms as CV
+import mindspore.dataset.transforms.c_transforms as C
+from mindspore.dataset.transforms.vision import Inter
+from mindspore.common import dtype as mstype
+
+
+def create_dataset(data_path, batch_size=32, repeat_size=1,
+                   num_parallel_workers=1):
+    """
+    create dataset for train or test
+    """
+    # define dataset
+    mnist_ds = ds.MnistDataset(data_path)
+
+    resize_height, resize_width = 32, 32
+    rescale = 1.0 / 255.0
+    shift = 0.0
+    rescale_nml = 1 / 0.3081
+    shift_nml = -1 * 0.1307 / 0.3081
+
+    # define map operations
+    resize_op = CV.Resize((resize_height, resize_width), interpolation=Inter.LINEAR)  # Bilinear mode
+    rescale_nml_op = CV.Rescale(rescale_nml, shift_nml)
+    rescale_op = CV.Rescale(rescale, shift)
+    hwc2chw_op = CV.HWC2CHW()
+    type_cast_op = C.TypeCast(mstype.int32)
+
+    # apply map operations on images
+    mnist_ds = mnist_ds.map(input_columns="label", operations=type_cast_op, num_parallel_workers=num_parallel_workers)
+    mnist_ds = mnist_ds.map(input_columns="image", operations=resize_op, num_parallel_workers=num_parallel_workers)
+    mnist_ds = mnist_ds.map(input_columns="image", operations=rescale_op, num_parallel_workers=num_parallel_workers)
+    mnist_ds = mnist_ds.map(input_columns="image", operations=rescale_nml_op, num_parallel_workers=num_parallel_workers)
+    mnist_ds = mnist_ds.map(input_columns="image", operations=hwc2chw_op, num_parallel_workers=num_parallel_workers)
+
+    # apply DatasetOps
+    buffer_size = 10000
+    mnist_ds = mnist_ds.shuffle(buffer_size=buffer_size)  # 10000 as in LeNet train script
+    mnist_ds = mnist_ds.batch(batch_size, drop_remainder=True)
+    mnist_ds = mnist_ds.repeat(repeat_size)
+
+    return mnist_ds

example/lenet_mnist/eval.py

@@ -0,0 +1,64 @@
+# 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.
+# ============================================================================
+"""
+######################## eval lenet example ########################
+eval lenet according to model file:
+python eval.py --data_path /YourDataPath --ckpt_path Your.ckpt
+"""
+
+import os
+import argparse
+from dataset import create_dataset
+from config import mnist_cfg as cfg
+import mindspore.nn as nn
+from mindspore.model_zoo.lenet import LeNet5
+from mindspore import context
+from mindspore.train.serialization import load_checkpoint, load_param_into_net
+from mindspore.train.callback import ModelCheckpoint, CheckpointConfig
+from mindspore.train import Model
+from mindspore.nn.metrics import Accuracy
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description='MindSpore MNIST Example')
+    parser.add_argument('--device_target', type=str, default="Ascend", choices=['Ascend', 'GPU', 'CPU'],
+                        help='device where the code will be implemented (default: Ascend)')
+    parser.add_argument('--data_path', type=str, default="./MNIST_Data",
+                        help='path where the dataset is saved')
+    parser.add_argument('--ckpt_path', type=str, default="", help='if mode is test, must provide\
+                        path where the trained ckpt file')
+    parser.add_argument('--dataset_sink_mode', type=bool, default=False, help='dataset_sink_mode is False or True')
+
+    args = parser.parse_args()
+
+    context.set_context(mode=context.GRAPH_MODE, device_target=args.device_target, enable_mem_reuse=False)
+
+    network = LeNet5(cfg.num_classes)
+    net_loss = nn.SoftmaxCrossEntropyWithLogits(is_grad=False, sparse=True, reduction="mean")
+    repeat_size = cfg.epoch_size
+    net_opt = nn.Momentum(network.trainable_params(), cfg.lr, cfg.momentum)
+    config_ck = CheckpointConfig(save_checkpoint_steps=cfg.save_checkpoint_steps,
+                                 keep_checkpoint_max=cfg.keep_checkpoint_max)
+    ckpoint_cb = ModelCheckpoint(prefix="checkpoint_lenet", config=config_ck)
+    model = Model(network, net_loss, net_opt, metrics={"Accuracy": Accuracy()})
+
+    print("============== Starting Testing ==============")
+    param_dict = load_checkpoint(args.ckpt_path)
+    load_param_into_net(network, param_dict)
+    ds_eval = create_dataset(os.path.join(args.data_path, "test"),
+                             cfg.batch_size,
+                             1)
+    acc = model.eval(ds_eval, dataset_sink_mode=args.dataset_sink_mode)
+    print("============== Accuracy:{} ==============".format(acc))

example/lenet_mnist/train.py

@@ -0,0 +1,58 @@
+# 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.
+# ============================================================================
+"""
+######################## train lenet example ########################
+train lenet and get network model files(.ckpt) :
+python train.py --data_path /YourDataPath
+"""
+
+import os
+import argparse
+from config import mnist_cfg as cfg
+from dataset import create_dataset
+import mindspore.nn as nn
+from mindspore.model_zoo.lenet import LeNet5
+from mindspore import context
+from mindspore.train.callback import ModelCheckpoint, CheckpointConfig, LossMonitor
+from mindspore.train import Model
+from mindspore.nn.metrics import Accuracy
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description='MindSpore MNIST Example')
+    parser.add_argument('--device_target', type=str, default="Ascend", choices=['Ascend', 'GPU', 'CPU'],
+                        help='device where the code will be implemented (default: Ascend)')
+    parser.add_argument('--data_path', type=str, default="./MNIST_Data",
+                        help='path where the dataset is saved')
+    parser.add_argument('--dataset_sink_mode', type=bool, default=False, help='dataset_sink_mode is False or True')
+
+    args = parser.parse_args()
+
+    context.set_context(mode=context.GRAPH_MODE, device_target=args.device_target, enable_mem_reuse=False)
+
+    network = LeNet5(cfg.num_classes)
+    net_loss = nn.SoftmaxCrossEntropyWithLogits(is_grad=False, sparse=True, reduction="mean")
+    net_opt = nn.Momentum(network.trainable_params(), cfg.lr, cfg.momentum)
+    config_ck = CheckpointConfig(save_checkpoint_steps=cfg.save_checkpoint_steps,
+                                 keep_checkpoint_max=cfg.keep_checkpoint_max)
+    ckpoint_cb = ModelCheckpoint(prefix="checkpoint_lenet", config=config_ck)
+    model = Model(network, net_loss, net_opt, metrics={"Accuracy": Accuracy()})
+
+    ds_train = create_dataset(os.path.join(args.data_path, "train"),
+                              cfg.batch_size,
+                              cfg.epoch_size)
+    print("============== Starting Training ==============")
+    model.train(cfg['epoch_size'], ds_train, callbacks=[ckpoint_cb, LossMonitor()],
+                dataset_sink_mode=args.dataset_sink_mode)

mindspore/model_zoo/alexnet.py

@@ -0,0 +1,73 @@
+# 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.
+# ============================================================================
+"""Alexnet."""
+import mindspore.nn as nn
+from mindspore.common.initializer import TruncatedNormal
+
+def conv(in_channels, out_channels, kernel_size, stride=1, padding=0, pad_mode="valid"):
+    weight = weight_variable()
+    return nn.Conv2d(in_channels, out_channels,
+                     kernel_size=kernel_size, stride=stride, padding=padding,
+                     weight_init=weight, has_bias=False, pad_mode=pad_mode)
+
+def fc_with_initialize(input_channels, out_channels):
+    weight = weight_variable()
+    bias = weight_variable()
+    return nn.Dense(input_channels, out_channels, weight, bias)
+
+def weight_variable():
+    return TruncatedNormal(0.02)  # 0.02
+
+
+class AlexNet(nn.Cell):
+    """
+    Alexnet
+    """
+    def __init__(self, num_classes=10):
+        super(AlexNet, self).__init__()
+        self.batch_size = 32
+        self.conv1 = conv(3, 96, 11, stride=4)
+        self.conv2 = conv(96, 256, 5, pad_mode="same")
+        self.conv3 = conv(256, 384, 3, pad_mode="same")
+        self.conv4 = conv(384, 384, 3, pad_mode="same")
+        self.conv5 = conv(384, 256, 3, pad_mode="same")
+        self.relu = nn.ReLU()
+        self.max_pool2d = nn.MaxPool2d(kernel_size=3, stride=2)
+        self.flatten = nn.Flatten()
+        self.fc1 = fc_with_initialize(6*6*256, 4096)
+        self.fc2 = fc_with_initialize(4096, 4096)
+        self.fc3 = fc_with_initialize(4096, num_classes)
+
+    def construct(self, x):
+        x = self.conv1(x)
+        x = self.relu(x)
+        x = self.max_pool2d(x)
+        x = self.conv2(x)
+        x = self.relu(x)
+        x = self.max_pool2d(x)
+        x = self.conv3(x)
+        x = self.relu(x)
+        x = self.conv4(x)
+        x = self.relu(x)
+        x = self.conv5(x)
+        x = self.relu(x)
+        x = self.max_pool2d(x)
+        x = self.flatten(x)
+        x = self.fc1(x)
+        x = self.relu(x)
+        x = self.fc2(x)
+        x = self.relu(x)
+        x = self.fc3(x)
+        return x

mindspore/model_zoo/lenet.py

@@ -13,7 +13,6 @@
 # limitations under the License.
 # ============================================================================
 """LeNet."""
-import mindspore.ops.operations as P
 import mindspore.nn as nn
 from mindspore.common.initializer import TruncatedNormal
 
@@ -62,7 +61,7 @@ class LeNet5(nn.Cell):
         self.fc3 = fc_with_initialize(84, self.num_class)
         self.relu = nn.ReLU()
         self.max_pool2d = nn.MaxPool2d(kernel_size=2, stride=2)
-        self.reshape = P.Reshape()
+        self.flatten = nn.Flatten()
 
     def construct(self, x):
         x = self.conv1(x)
@@ -71,7 +70,7 @@ class LeNet5(nn.Cell):
         x = self.conv2(x)
         x = self.relu(x)
         x = self.max_pool2d(x)
-        x = self.reshape(x, (self.batch_size, -1))
+        x = self.flatten(x)
         x = self.fc1(x)
         x = self.relu(x)
         x = self.fc2(x)