add cancel task sample

Signed-off-by: Tianhao He <het@vmware.com>

samples/vmc/tasks/cancel_task.py

@@ -0,0 +1,50 @@
+"""
+* *******************************************************
+* Copyright (c) VMware, Inc. 2019. All Rights Reserved.
+* SPDX-License-Identifier: MIT
+* *******************************************************
+*
+* DISCLAIMER. THIS PROGRAM IS PROVIDED TO YOU "AS IS" WITHOUT
+* WARRANTIES OR CONDITIONS OF ANY KIND, WHETHER ORAL OR WRITTEN,
+* EXPRESS OR IMPLIED. THE AUTHOR SPECIFICALLY DISCLAIMS ANY IMPLIED
+* WARRANTIES OR CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY,
+* NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR PURPOSE.
+"""
+
+__author__ = 'VMware, Inc.'
+
+import argparse
+
+from com.vmware.vmc.model_client import Task
+from vmware.vapi.vmc.client import create_vmc_client
+
+"""
+Demonstrates how to cancel a running task
+
+Sample Prerequisites:
+    - VMware Cloud on AWS console API access
+    - A running task
+"""
+
+parser = argparse.ArgumentParser(
+            formatter_class=argparse.ArgumentDefaultsHelpFormatter)
+
+parser.add_argument('--refresh-token',
+                    required=True,
+                    help='VMware Cloud API refresh token')
+
+parser.add_argument('--org-id',
+                    required=True,
+                    help='Organization identifier.')
+
+parser.add_argument('--task-id',
+                    required=True,
+                    help='Task ID to be cancelled')
+
+args = parser.parse_args()
+
+vmc_client = create_vmc_client(args.refresh_token)
+
+vmc_client.orgs.Tasks.update(org=args.org_id, task=args.task_id, action='cancel')
+
+print('Task "{}" is cancelled'.format(args.task_id))