def test_random_color_c_errors():
"""
Test that Cpp RandomColor errors with bad input
"""
with pytest.raises(TypeError) as error_info:
vision.RandomColor((12))
assert "degrees must be either a tuple or a list." in str(error_info.value)
with pytest.raises(TypeError) as error_info:
vision.RandomColor(("col", 3))
assert "Argument degrees[0] with value col is not of type (<class 'int'>, <class 'float'>)." in str(
error_info.value)
with pytest.raises(ValueError) as error_info:
vision.RandomColor((0.9, 0.1))
assert "degrees should be in (min,max) format. Got (max,min)." in str(error_info.value)
with pytest.raises(ValueError) as error_info:
vision.RandomColor((0.9,))
assert "degrees must be a sequence with length 2." in str(error_info.value)
# RandomColor Cpp Op will fail with one channel input
mnist_ds = ds.MnistDataset(dataset_dir=MNIST_DATA_DIR, num_samples=2, shuffle=False)
mnist_ds = mnist_ds.map(operations=vision.RandomColor(), input_columns="image")
with pytest.raises(RuntimeError) as error_info:
for _ in enumerate(mnist_ds):
pass
assert "Invalid number of channels in input image" in str(error_info.value)
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(operations=type_cast_op, input_columns="label", num_parallel_workers=num_parallel_workers)
mnist_ds = mnist_ds.map(operations=resize_op, input_columns="image", num_parallel_workers=num_parallel_workers)
mnist_ds = mnist_ds.map(operations=rescale_op, input_columns="image", num_parallel_workers=num_parallel_workers)
mnist_ds = mnist_ds.map(operations=rescale_nml_op, input_columns="image", num_parallel_workers=num_parallel_workers)
mnist_ds = mnist_ds.map(operations=hwc2chw_op, input_columns="image", 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
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
# define map operations
resize_op = CV.Resize((resize_height, resize_width)) # Bilinear mode
rescale_op = CV.Rescale(rescale, shift)
hwc2chw_op = CV.HWC2CHW()
# apply map operations on images
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=hwc2chw_op,
num_parallel_workers=num_parallel_workers)
# apply DatasetOps
mnist_ds = mnist_ds.batch(batch_size)
mnist_ds = mnist_ds.repeat(repeat_size)
return mnist_ds
def test_mnist_sampler_chain():
"""
Test Mnist sampler chain
"""
logger.info("test_mnist_sampler_chain")
sampler = ds.DistributedSampler(num_shards=1,
shard_id=0,
shuffle=False,
num_samples=3,
offset=1)
child_sampler = ds.RandomSampler(replacement=True, num_samples=4)
sampler.add_child(child_sampler)
data1 = ds.MnistDataset(MNIST_DATA_DIR, sampler=sampler)
# Verify dataset size
data1_size = data1.get_dataset_size()
logger.info("dataset size is: {}".format(data1_size))
assert data1_size == 3
# Verify number of rows
assert sum([1 for _ in data1]) == 3
# Verify dataset contents
res = []
for item in data1.create_tuple_iterator(num_epochs=1, output_numpy=True):
logger.info("item: {}".format(item))
res.append(item)
logger.info("dataset: {}".format(res))
def create_mnist_dataset(mnist_dir, num_parallel_workers=1):
"""create mnist dataset method"""
ds = de.MnistDataset(mnist_dir)
# apply map operations on images
ds = ds.map(operations=C.TypeCast(mstype.int32), input_columns="label")
ds = ds.map(operations=VC.Resize((MNIST_CONFIG.image_height, MNIST_CONFIG.image_width),
interpolation=Inter.LINEAR),
input_columns="image",
num_parallel_workers=num_parallel_workers)
ds = ds.map(operations=VC.Rescale(1 / 0.3081, -1 * 0.1307 / 0.3081),
input_columns="image",
num_parallel_workers=num_parallel_workers)
ds = ds.map(operations=VC.Rescale(1.0 / 255.0, 0.0),
input_columns="image",
num_parallel_workers=num_parallel_workers)
ds = ds.map(operations=VC.HWC2CHW(),
input_columns="image",
num_parallel_workers=num_parallel_workers)
# apply DatasetOps
ds = ds.shuffle(buffer_size=MNIST_CONFIG.buffer_size) # 10000 as in LeNet train script
ds = ds.batch(MNIST_CONFIG.batch_size, drop_remainder=True)
ds = ds.repeat(MNIST_CONFIG.repeat_size)
return ds
def test_mnist_dataset(remove_json_files=True):
data_dir = "../data/dataset/testMnistData"
ds.config.set_seed(1)
data1 = ds.MnistDataset(data_dir, 100)
one_hot_encode = c.OneHot(10) # num_classes is input argument
data1 = data1.map(input_columns="label", operations=one_hot_encode)
# batch_size is input argument
data1 = data1.batch(batch_size=10, drop_remainder=True)
ds.serialize(data1, "mnist_dataset_pipeline.json")
assert validate_jsonfile("mnist_dataset_pipeline.json") is True
data2 = ds.deserialize(json_filepath="mnist_dataset_pipeline.json")
ds.serialize(data2, "mnist_dataset_pipeline_1.json")
assert validate_jsonfile("mnist_dataset_pipeline_1.json") is True
assert filecmp.cmp('mnist_dataset_pipeline.json', 'mnist_dataset_pipeline_1.json')
data3 = ds.deserialize(json_filepath="mnist_dataset_pipeline_1.json")
num = 0
for data1, data2, data3 in zip(data1.create_dict_iterator(), data2.create_dict_iterator(),
data3.create_dict_iterator()):
assert np.array_equal(data1['image'], data2['image'])
assert np.array_equal(data1['image'], data3['image'])
assert np.array_equal(data1['label'], data2['label'])
assert np.array_equal(data1['label'], data3['label'])
num += 1
logger.info("mnist total num samples is {}".format(str(num)))
assert num == 10
if remove_json_files:
delete_json_files()
def test_mnist_sequential_sampler():
"""
Test MnistDataset with SequentialSampler
"""
logger.info("Test MnistDataset Op with SequentialSampler")
num_samples = 50
sampler = ds.SequentialSampler(num_samples=num_samples)
data1 = ds.MnistDataset(DATA_DIR, sampler=sampler)
data2 = ds.MnistDataset(DATA_DIR, shuffle=False, num_samples=num_samples)
label_list1, label_list2 = [], []
num_iter = 0
for item1, item2 in zip(data1.create_dict_iterator(num_epochs=1), data2.create_dict_iterator(num_epochs=1)):
label_list1.append(item1["label"].asnumpy())
label_list2.append(item2["label"].asnumpy())
num_iter += 1
np.testing.assert_array_equal(label_list1, label_list2)
assert num_iter == num_samples
def create_dataset(data_path,
batch_size=32,
repeat_size=1,
num_parallel_workers=1):
""" create dataset for train or test
Args:
data_path: Data path
batch_size: The number of data records in each group
repeat_size: The number of replicated data records
num_parallel_workers: The number of parallel workers
"""
# define dataset
mnist_ds = ds.MnistDataset(data_path)
# define operation parameters
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) # Resize images to (32, 32)
rescale_nml_op = CV.Rescale(rescale_nml, shift_nml) # normalize images
rescale_op = CV.Rescale(rescale, shift) # rescale images
hwc2chw_op = CV.HWC2CHW(
) # change shape from (height, width, channel) to (channel, height, width) to fit network.
type_cast_op = C.TypeCast(
mstype.int32) # change data type of label to int32 to fit network
# 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
def create_dataset(data_path,
batch_size=32,
repeat_size=1,
num_parallel_workers=1):
"""
create dataset for train or test
Args:
data_path (str): Data path
batch_size (int): The number of data records in each group
repeat_size (int): The number of replicated data records
num_parallel_workers (int): The number of parallel workers
"""
# define dataset
mnist_ds = ds.MnistDataset(data_path)
# define some parameters needed for data enhancement and rough justification
resize_height = 32
resize_width = 32
rescale = 1.0 / 255.0
shift = 0.0
rescale_nml = 1 / 0.3081
shift_nml = -1.0 * 0.1307 / 0.3081
# according to the parameters, generate the corresponding data enhancement method
resize_op = CV.Resize((resize_height, resize_width),
interpolation=Inter.LINEAR)
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)
# using map to apply operations to dataset
mnist_ds = mnist_ds.map(operations=type_cast_op,
input_columns="label",
num_parallel_workers=num_parallel_workers)
mnist_ds = mnist_ds.map(operations=resize_op,
input_columns="image",
num_parallel_workers=num_parallel_workers)
mnist_ds = mnist_ds.map(operations=rescale_op,
input_columns="image",
num_parallel_workers=num_parallel_workers)
mnist_ds = mnist_ds.map(operations=rescale_nml_op,
input_columns="image",
num_parallel_workers=num_parallel_workers)
mnist_ds = mnist_ds.map(operations=hwc2chw_op,
input_columns="image",
num_parallel_workers=num_parallel_workers)
# process the generated dataset
buffer_size = 10000
mnist_ds = mnist_ds.shuffle(buffer_size=buffer_size)
mnist_ds = mnist_ds.batch(batch_size, drop_remainder=True)
mnist_ds = mnist_ds.repeat(repeat_size)
return mnist_ds
def test_config(usage, mnist_path=None):
mnist_path = DATA_DIR if mnist_path is None else mnist_path
try:
data = ds.MnistDataset(mnist_path, usage=usage, shuffle=False)
num_rows = 0
for _ in data.create_dict_iterator():
num_rows += 1
except (ValueError, TypeError, RuntimeError) as e:
return str(e)
return num_rows
def test_mnist_usage():
"""
Validate MnistDataset image readings
"""
logger.info("Test MnistDataset usage flag")
def test_config(usage, mnist_path=None):
mnist_path = DATA_DIR if mnist_path is None else mnist_path
try:
data = ds.MnistDataset(mnist_path, usage=usage, shuffle=False)
num_rows = 0
for _ in data.create_dict_iterator(num_epochs=1,
output_numpy=True):
num_rows += 1
except (ValueError, TypeError, RuntimeError) as e:
return str(e)
return num_rows
assert test_config("test") == 10000
assert test_config("all") == 10000
assert " no valid data matching the dataset API MnistDataset" in test_config(
"train")
assert "usage is not within the valid set of ['train', 'test', 'all']" in test_config(
"invalid")
assert "Argument usage with value ['list'] is not of type (<class 'str'>,)" in test_config(
["list"])
# change this directory to the folder that contains all mnist files
all_files_path = None
# the following tests on the entire datasets
if all_files_path is not None:
assert test_config("train", all_files_path) == 60000
assert test_config("test", all_files_path) == 10000
assert test_config("all", all_files_path) == 70000
assert ds.MnistDataset(all_files_path,
usage="train").get_dataset_size() == 60000
assert ds.MnistDataset(all_files_path,
usage="test").get_dataset_size() == 10000
assert ds.MnistDataset(all_files_path,
usage="all").get_dataset_size() == 70000
def generate_mnist_dataset(data_path,
batch_size=32,
repeat_size=1,
samples=None,
num_parallel_workers=1,
sparse=True):
"""
create dataset for training or testing
"""
# define dataset
ds1 = ds.MnistDataset(data_path, num_samples=samples)
# define operation parameters
resize_height, resize_width = 32, 32
rescale = 1.0 / 255.0
shift = 0.0
# define map operations
resize_op = CV.Resize((resize_height, resize_width),
interpolation=Inter.LINEAR)
rescale_op = CV.Rescale(rescale, shift)
hwc2chw_op = CV.HWC2CHW()
type_cast_op = C.TypeCast(mstype.int32)
# apply map operations on images
if not sparse:
one_hot_enco = C.OneHot(10)
ds1 = ds1.map(input_columns="label",
operations=one_hot_enco,
num_parallel_workers=num_parallel_workers)
type_cast_op = C.TypeCast(mstype.float32)
ds1 = ds1.map(input_columns="label",
operations=type_cast_op,
num_parallel_workers=num_parallel_workers)
ds1 = ds1.map(input_columns="image",
operations=resize_op,
num_parallel_workers=num_parallel_workers)
ds1 = ds1.map(input_columns="image",
operations=rescale_op,
num_parallel_workers=num_parallel_workers)
ds1 = ds1.map(input_columns="image",
operations=hwc2chw_op,
num_parallel_workers=num_parallel_workers)
# apply DatasetOps
buffer_size = 10000
ds1 = ds1.shuffle(buffer_size=buffer_size)
ds1 = ds1.batch(batch_size, drop_remainder=True)
ds1 = ds1.repeat(repeat_size)
return ds1
def test_random_affine_py_exception_non_pil_images():
"""
Test RandomAffine: input img is ndarray and not PIL, expected to raise RuntimeError
"""
logger.info("test_random_affine_exception_negative_degrees")
dataset = ds.MnistDataset(MNIST_DATA_DIR, num_samples=3, num_parallel_workers=3)
try:
transform = mindspore.dataset.transforms.py_transforms.Compose([py_vision.ToTensor(),
py_vision.RandomAffine(degrees=(15, 15))])
dataset = dataset.map(operations=transform, input_columns=["image"], num_parallel_workers=3)
for _ in dataset.create_dict_iterator(num_epochs=1):
pass
except RuntimeError as e:
logger.info("Got an exception in DE: {}".format(str(e)))
assert "Pillow image" in str(e)
def test_random_affine_py_exception_non_pil_images():
"""
Test RandomAffine: input img is ndarray and not PIL, expected to raise RuntimeError
"""
logger.info("test_random_affine_exception_negative_degrees")
dataset = ds.MnistDataset(MNIST_DATA_DIR, num_parallel_workers=3)
try:
transform = py_vision.ComposeOp([py_vision.ToTensor(),
py_vision.RandomAffine(degrees=(15, 15))])
dataset = dataset.map(input_columns=["image"], operations=transform(), num_parallel_workers=3,
python_multiprocessing=True)
for _ in dataset.create_dict_iterator():
break
except RuntimeError as e:
logger.info("Got an exception in DE: {}".format(str(e)))
assert "Pillow image" in str(e)
def test_mnist_pk_sampler():
"""
Test MnistDataset with PKSampler
"""
logger.info("Test MnistDataset Op with PKSampler")
golden = [0, 0, 0, 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 4,
5, 5, 5, 6, 6, 6, 7, 7, 7, 8, 8, 8, 9, 9, 9]
sampler = ds.PKSampler(3)
data = ds.MnistDataset(DATA_DIR, sampler=sampler)
num_iter = 0
label_list = []
for item in data.create_dict_iterator(num_epochs=1, output_numpy=True):
label_list.append(item["label"])
num_iter += 1
np.testing.assert_array_equal(golden, label_list)
assert num_iter == 30
def test_mnist_content_check():
"""
Validate MnistDataset image readings
"""
logger.info("Test MnistDataset Op with content check")
data1 = ds.MnistDataset(DATA_DIR, num_samples=100, shuffle=False)
images, labels = load_mnist(DATA_DIR)
num_iter = 0
# in this example, each dictionary has keys "image" and "label"
image_list, label_list = [], []
for i, data in enumerate(data1.create_dict_iterator(num_epochs=1, output_numpy=True)):
image_list.append(data["image"])
label_list.append("label {}".format(data["label"]))
np.testing.assert_array_equal(data["image"], images[i])
np.testing.assert_array_equal(data["label"], labels[i])
num_iter += 1
assert num_iter == 100
def sharding_config(num_shards,
shard_id,
num_samples,
shuffle,
repeat_cnt=1):
data1 = ds.MnistDataset(mnist_dir,
num_shards=num_shards,
shard_id=shard_id,
num_samples=num_samples,
shuffle=shuffle)
data1 = data1.repeat(repeat_cnt)
res = []
for item in data1.create_dict_iterator(): # each data is a dictionary
res.append(item["label"].item())
if print_res:
logger.info("labels of dataset: {}".format(res))
return res
def create_dataset(data_path,
batch_size=32,
repeat_size=1,
num_parallel_workers=1):
""" create dataset for train or test
Args:
data_path (str): Data path
batch_size (int): The number of data records in each group
repeat_size (int): The number of replicated data records
num_parallel_workers (int): The number of parallel workers
"""
# define dataset
mnist_ds = ds.MnistDataset(data_path)
# define operation parameters
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
type_cast_op = C.TypeCast(mstype.int32)
c_trans = [
CV.Resize((resize_height, resize_width), interpolation=Inter.LINEAR),
CV.Rescale(rescale_nml, shift_nml),
CV.Rescale(rescale, shift),
CV.HWC2CHW()
]
# apply map operations on images
mnist_ds = mnist_ds.map(operations=type_cast_op,
input_columns="label",
num_parallel_workers=num_parallel_workers)
mnist_ds = mnist_ds.map(operations=c_trans,
input_columns="image",
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
def create_mnist_dataset(mode='train', num_samples=2, batch_size=2):
"""create dataset for train or test"""
mnist_path = '/home/workspace/mindspore_dataset/mnist'
num_parallel_workers = 1
# define dataset
mnist_ds = ds.MnistDataset(os.path.join(mnist_path, mode),
num_samples=num_samples,
shuffle=False)
resize_height, resize_width = 32, 32
# define map operations
resize_op = CV.Resize((resize_height, resize_width),
interpolation=Inter.LINEAR) # Bilinear mode
rescale_nml_op = CV.Rescale(1 / 0.3081, -1 * 0.1307 / 0.3081)
rescale_op = CV.Rescale(1.0 / 255.0, shift=0.0)
hwc2chw_op = CV.HWC2CHW()
type_cast_op = C.TypeCast(mstype.int32)
# apply map operations on images
mnist_ds = mnist_ds.map(operations=type_cast_op,
input_columns="label",
num_parallel_workers=num_parallel_workers)
mnist_ds = mnist_ds.map(operations=resize_op,
input_columns="image",
num_parallel_workers=num_parallel_workers)
mnist_ds = mnist_ds.map(operations=rescale_op,
input_columns="image",
num_parallel_workers=num_parallel_workers)
mnist_ds = mnist_ds.map(operations=rescale_nml_op,
input_columns="image",
num_parallel_workers=num_parallel_workers)
mnist_ds = mnist_ds.map(operations=hwc2chw_op,
input_columns="image",
num_parallel_workers=num_parallel_workers)
# apply DatasetOps
mnist_ds = mnist_ds.batch(batch_size=batch_size, drop_remainder=True)
return mnist_ds
def create_dataset(data_path, batch_size=1, num_parallel_workers=1):
"""create data"""
# 定义数据集
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
# 定义所需要操作的map映射
resize_op = CV.Resize((resize_height, resize_width),
interpolation=Inter.LINEAR)
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)
# 使用map映射函数，将数据操作应用到数据集
mnist_ds = mnist_ds.map(operations=type_cast_op,
input_columns="label",
num_parallel_workers=num_parallel_workers)
mnist_ds = mnist_ds.map(operations=resize_op,
input_columns="image",
num_parallel_workers=num_parallel_workers)
mnist_ds = mnist_ds.map(operations=rescale_op,
input_columns="image",
num_parallel_workers=num_parallel_workers)
mnist_ds = mnist_ds.map(operations=rescale_nml_op,
input_columns="image",
num_parallel_workers=num_parallel_workers)
mnist_ds = mnist_ds.map(operations=hwc2chw_op,
input_columns="image",
num_parallel_workers=num_parallel_workers)
# 进行shuffle、batch操作
buffer_size = 10000
mnist_ds = mnist_ds.shuffle(buffer_size=buffer_size)
mnist_ds = mnist_ds.batch(batch_size, drop_remainder=True)
return mnist_ds
def test_mnist_visualize(plot=False):
"""
Visualize MnistDataset results
"""
logger.info("Test MnistDataset visualization")
data1 = ds.MnistDataset(DATA_DIR, num_samples=10, shuffle=False)
num_iter = 0
image_list, label_list = [], []
for item in data1.create_dict_iterator(num_epochs=1, output_numpy=True):
image = item["image"]
label = item["label"]
image_list.append(image)
label_list.append("label {}".format(label))
assert isinstance(image, np.ndarray)
assert image.shape == (28, 28, 1)
assert image.dtype == np.uint8
assert label.dtype == np.uint32
num_iter += 1
assert num_iter == 10
if plot:
visualize_dataset(image_list, label_list)
def test_mnist_dataset_size():
ds_total = ds.MnistDataset(MNIST_DATA_DIR)
assert ds_total.get_dataset_size() == 10000
# test get dataset_size with the usage arg
test_size = ds.MnistDataset(MNIST_DATA_DIR, usage="test").get_dataset_size()
assert test_size == 10000
train_size = ds.MnistDataset(MNIST_DATA_DIR, usage="train").get_dataset_size()
assert train_size == 0
all_size = ds.MnistDataset(MNIST_DATA_DIR, usage="all").get_dataset_size()
assert all_size == 10000
ds_shard_1_0 = ds.MnistDataset(MNIST_DATA_DIR, num_shards=1, shard_id=0)
assert ds_shard_1_0.get_dataset_size() == 10000
ds_shard_2_0 = ds.MnistDataset(MNIST_DATA_DIR, num_shards=2, shard_id=0)
assert ds_shard_2_0.get_dataset_size() == 5000
ds_shard_3_0 = ds.MnistDataset(MNIST_DATA_DIR, num_shards=3, shard_id=0)
assert ds_shard_3_0.get_dataset_size() == 3334
def test_get_column_name_mnist():
data = ds.MnistDataset(MNIST_DIR)
assert data.get_col_names() == ["image", "label"]
def get_test_set(self):
dataset = ds.MnistDataset(dataset_dir=self.test_path)
return DataSource.transform(dataset)
def test_mnist_exception():
"""
Test error cases for MnistDataset
"""
logger.info("Test error cases for MnistDataset")
error_msg_1 = "sampler and shuffle cannot be specified at the same time"
with pytest.raises(RuntimeError, match=error_msg_1):
ds.MnistDataset(DATA_DIR, shuffle=False, sampler=ds.PKSampler(3))
error_msg_2 = "sampler and sharding cannot be specified at the same time"
with pytest.raises(RuntimeError, match=error_msg_2):
ds.MnistDataset(DATA_DIR,
sampler=ds.PKSampler(3),
num_shards=2,
shard_id=0)
error_msg_3 = "num_shards is specified and currently requires shard_id as well"
with pytest.raises(RuntimeError, match=error_msg_3):
ds.MnistDataset(DATA_DIR, num_shards=10)
error_msg_4 = "shard_id is specified but num_shards is not"
with pytest.raises(RuntimeError, match=error_msg_4):
ds.MnistDataset(DATA_DIR, shard_id=0)
error_msg_5 = "Input shard_id is not within the required interval"
with pytest.raises(ValueError, match=error_msg_5):
ds.MnistDataset(DATA_DIR, num_shards=5, shard_id=-1)
with pytest.raises(ValueError, match=error_msg_5):
ds.MnistDataset(DATA_DIR, num_shards=5, shard_id=5)
with pytest.raises(ValueError, match=error_msg_5):
ds.MnistDataset(DATA_DIR, num_shards=2, shard_id=5)
error_msg_6 = "num_parallel_workers exceeds"
with pytest.raises(ValueError, match=error_msg_6):
ds.MnistDataset(DATA_DIR, shuffle=False, num_parallel_workers=0)
with pytest.raises(ValueError, match=error_msg_6):
ds.MnistDataset(DATA_DIR, shuffle=False, num_parallel_workers=256)
with pytest.raises(ValueError, match=error_msg_6):
ds.MnistDataset(DATA_DIR, shuffle=False, num_parallel_workers=-2)
error_msg_7 = "Argument shard_id"
with pytest.raises(TypeError, match=error_msg_7):
ds.MnistDataset(DATA_DIR, num_shards=2, shard_id="0")
def exception_func(item):
raise Exception("Error occur!")
error_msg_8 = "The corresponding data files"
with pytest.raises(RuntimeError, match=error_msg_8):
data = ds.MnistDataset(DATA_DIR)
data = data.map(operations=exception_func,
input_columns=["image"],
num_parallel_workers=1)
for _ in data.__iter__():
pass
with pytest.raises(RuntimeError, match=error_msg_8):
data = ds.MnistDataset(DATA_DIR)
data = data.map(operations=vision.Decode(),
input_columns=["image"],
num_parallel_workers=1)
data = data.map(operations=exception_func,
input_columns=["image"],
num_parallel_workers=1)
for _ in data.__iter__():
pass
with pytest.raises(RuntimeError, match=error_msg_8):
data = ds.MnistDataset(DATA_DIR)
data = data.map(operations=exception_func,
input_columns=["label"],
num_parallel_workers=1)
for _ in data.__iter__():
pass
def test_mnist_exception():
"""
Test error cases for MnistDataset
"""
logger.info("Test error cases for MnistDataset")
error_msg_1 = "sampler and shuffle cannot be specified at the same time"
with pytest.raises(RuntimeError, match=error_msg_1):
ds.MnistDataset(DATA_DIR, shuffle=False, sampler=ds.PKSampler(3))
error_msg_2 = "sampler and sharding cannot be specified at the same time"
with pytest.raises(RuntimeError, match=error_msg_2):
ds.MnistDataset(DATA_DIR,
sampler=ds.PKSampler(3),
num_shards=2,
shard_id=0)
error_msg_3 = "num_shards is specified and currently requires shard_id as well"
with pytest.raises(RuntimeError, match=error_msg_3):
ds.MnistDataset(DATA_DIR, num_shards=10)
error_msg_4 = "shard_id is specified but num_shards is not"
with pytest.raises(RuntimeError, match=error_msg_4):
ds.MnistDataset(DATA_DIR, shard_id=0)
error_msg_5 = "Input shard_id is not within the required interval"
with pytest.raises(ValueError, match=error_msg_5):
ds.MnistDataset(DATA_DIR, num_shards=5, shard_id=-1)
with pytest.raises(ValueError, match=error_msg_5):
ds.MnistDataset(DATA_DIR, num_shards=5, shard_id=5)
with pytest.raises(ValueError, match=error_msg_5):
ds.MnistDataset(DATA_DIR, num_shards=2, shard_id=5)
error_msg_6 = "num_parallel_workers exceeds"
with pytest.raises(ValueError, match=error_msg_6):
ds.MnistDataset(DATA_DIR, shuffle=False, num_parallel_workers=0)
with pytest.raises(ValueError, match=error_msg_6):
ds.MnistDataset(DATA_DIR, shuffle=False, num_parallel_workers=65)
with pytest.raises(ValueError, match=error_msg_6):
ds.MnistDataset(DATA_DIR, shuffle=False, num_parallel_workers=-2)
error_msg_7 = "Argument shard_id"
with pytest.raises(TypeError, match=error_msg_7):
ds.MnistDataset(DATA_DIR, num_shards=2, shard_id="0")
def get_train_set(self, sampler):
dataset = ds.MnistDataset(dataset_dir=self.train_path,
sampler=sampler.get())
return DataSource.transform(dataset)