chore: import upstream snapshot with attribution

python/paddle/io/dataloader/__init__.py

@@ -0,0 +1,36 @@
+#   Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
+#
+# 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.
+
+from .batch_sampler import (  # noqa: F401
+    BatchSampler,
+    DistributedBatchSampler,
+)
+from .dataset import (  # noqa: F401
+    ChainDataset,
+    ComposeDataset,
+    ConcatDataset,
+    Dataset,
+    IterableDataset,
+    Subset,
+    TensorDataset,
+    random_split,
+)
+from .sampler import (  # noqa: F401
+    RandomSampler,
+    Sampler,
+    SequenceSampler,
+    SubsetRandomSampler,
+    WeightedRandomSampler,
+)
+from .worker import get_worker_info  # noqa: F401