Introduce code from Rust monorepo. This is a mess

tts/NeMo/tests/hydra/my_app.py

@@ -0,0 +1,44 @@
+# Copyright (c) 2021, NVIDIA CORPORATION.  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 dataclasses import dataclass
+
+import hydra
+from omegaconf import MISSING, OmegaConf
+
+from nemo.core.config import hydra_runner
+
+
+@dataclass
+class DefaultConfig:
+    """
+    This is structured config for this application.
+
+    It provides the schema used for validation of user-written spec file
+    as well as default values of the selected parameters.
+    """
+
+    # Dataset. Available options: [imdb, sst2]
+    dataset_name: str = MISSING
+
+
+@hydra_runner(config_name="DefaultConfig", schema=DefaultConfig)
+def my_app(cfg):
+    print(OmegaConf.to_yaml(cfg))
+    # Get dataset_name.
+    dataset_name = cfg.dataset_name
+
+
+if __name__ == "__main__":
+    my_app()