add new file

Author: laurenyu

tests/unit/sagemaker/image_uris/regions.py

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+# Copyright 2020 Amazon.com, Inc. or its affiliates. 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. A copy of
+# the License is located at
+#
+#     http://aws.amazon.com/apache2.0/
+#
+# or in the "license" file accompanying this file. This file 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 __future__ import absolute_import
+
+import boto3
+
+
+def regions():
+    boto_session = boto3.Session()
+    for partition in boto_session.get_available_partitions():
+        for region in boto_session.get_available_regions("sagemaker", partition_name=partition):
+            yield region