docs: add cancel operation sample

Author: busunkim96

samples/beta/cancel_operation.py

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+# -*- coding: utf-8 -*-
+#
+# Copyright 2019 Google LLC
+#
+# 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
+#
+# https://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.
+
+import sys
+
+# [START automl_cancel_operation]
+
+from google.cloud import automl_v1beta1
+
+
+def sample_cancel_operation(project, operation_id):
+ """
+ Cancel Long-Running Operation
+
+ Args:
+ project Required. Your Google Cloud Project ID.
+ operation_id Required. The ID of the Operation.
+ """
+
+ client = automl_v1beta1.AutoMlClient()
+
+ operations_client = client.transport._operations_client
+
+ # project = '[Google Cloud Project ID]'
+ # operation_id = '[Operation ID]'
+ name = "projects/{}/locations/us-central1/operations/{}".format(
+ project, operation_id
+ )
+
+ operations_client.cancel_operation(name)
+
+ print(u"Cancelled operation: {}".format(name))
+
+
+# [END automl_cancel_operation]
+
+
+def main():
+ import argparse
+
+ parser = argparse.ArgumentParser()
+ parser.add_argument("--project", type=str, default="[Google Cloud Project ID]")
+ parser.add_argument("--operation_id", type=str, default="[Operation ID]")
+ args = parser.parse_args()
+
+ sample_cancel_operation(args.project, args.operation_id)
+
+
+if __name__ == "__main__":
+ main()