add lenet train eval gpu st case

tests/st/networks/test_gpu_lenet.py

@@ -13,18 +13,26 @@
 # limitations under the License.
 # ============================================================================
 
+import os
 import pytest
 import numpy as np
-import mindspore.nn as nn
-import mindspore.context as context
 from mindspore import Tensor
-from mindspore.nn.optim import Momentum
+import mindspore.context as context
 from mindspore.ops import operations as P
-from mindspore.nn import TrainOneStepCell, WithLossCell
-from mindspore.nn import Dense
-from mindspore.common.initializer import initializer
+import mindspore.nn as nn
+from mindspore.nn import Dense, TrainOneStepCell, WithLossCell
+from mindspore.nn.optim import Momentum
+from mindspore.nn.metrics import Accuracy
+from mindspore.train import Model
 from mindspore.common import dtype as mstype
+from mindspore.common.initializer import initializer
+from mindspore.model_zoo.lenet import LeNet5
+from mindspore.train.callback import LossMonitor
 
+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
 
 context.set_context(mode=context.GRAPH_MODE, device_target="GPU")
 
@@ -64,7 +72,7 @@ class LeNet(nn.Cell):
 def multisteplr(total_steps, gap, base_lr=0.9, gamma=0.1, dtype=mstype.float32):
     lr = []
     for step in range(total_steps):
-        lr_ = base_lr * gamma ** (step//gap)
+        lr_ = base_lr * gamma ** (step // gap)
         lr.append(lr_)
     return Tensor(np.array(lr), dtype)
 
@@ -90,3 +98,60 @@ def test_train_lenet():
         loss = train_network(data, label)
         losses.append(loss)
     print(losses)
+
+
+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
+
+
+@pytest.mark.level0
+@pytest.mark.platform_x86_gpu_training
+@pytest.mark.env_onecard
+def test_train_and_eval_lenet():
+    context.set_context(mode=context.GRAPH_MODE, device_target="GPU", enable_mem_reuse=False)
+    network = LeNet5(10)
+    net_loss = nn.SoftmaxCrossEntropyWithLogits(is_grad=False, sparse=True, reduction="mean")
+    net_opt = nn.Momentum(network.trainable_params(), 0.01, 0.9)
+    model = Model(network, net_loss, net_opt, metrics={"Accuracy": Accuracy()})
+
+    print("============== Starting Training ==============")
+    ds_train = create_dataset(os.path.join('/home/workspace/mindspore_dataset/mnist', "train"), 32, 1)
+    model.train(1, ds_train, callbacks=[LossMonitor()], dataset_sink_mode=True)
+
+    print("============== Starting Testing ==============")
+    ds_eval = create_dataset(os.path.join('/home/workspace/mindspore_dataset/mnist', "test"), 32, 1)
+    acc = model.eval(ds_eval, dataset_sink_mode=True)
+    print("============== Accuracy:{} ==============".format(acc))