Introduce code from Rust monorepo. This is a mess

tts/nemo/constants.py

@@ -0,0 +1,18 @@
+# Copyright (c) 2020, 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.
+
+NEMO_ENV_VARNAME_ENABLE_COLORING = "NEMO_ENABLE_COLORING"
+NEMO_ENV_VARNAME_REDIRECT_LOGS_TO_STDERR = "NEMO_REDIRECT_LOGS_TO_STDERR"
+NEMO_ENV_VARNAME_TESTING = "NEMO_TESTING"  # Set to True to enable nemo.util.logging's debug mode
+NEMO_ENV_VARNAME_VERSION = "NEMO_EXPM_VERSION"  # Used for nemo.utils.exp_manager versioning