add a basic sample template for simple samples

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

sample_template/README.md

@@ -1,10 +1,5 @@
 Boilerplate code for new samples
 ================================
 
-sample_template.py contains boilerplate code that can be used for most of 
-the new samples. Please fill out the TODOs with your sample information.
-The steps included in the template code are:
- 
- * Cmd line argument parser.
- * Login to vAPI services using vSphere Automation API.
- * Cleanup after sample execution.
+* For complex samples require setup and cleanup please use sample_template_complex.py    
+* For simple samples which just demo basic API usage please use sample_template_basic.py

sample_template/sample_template_basic.py

@@ -0,0 +1,60 @@
+#!/usr/bin/env python
+
+"""
+* *******************************************************
+* 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__ = 'TODO: <your name and email>'
+__vcenter_version__ = 'TODO: <compatible vcenter versions>'
+
+from com.vmware.vcenter_client import VM
+from vmware.vapi.vsphere.client import create_vsphere_client
+
+from samples.vsphere.common import sample_cli
+from samples.vsphere.common import sample_util
+from samples.vsphere.common.ssl_helper import get_unverified_session
+
+
+"""
+TODO: Sample description and prerequisites.
+e.g. Demonstrates getting list of VMs present in vCenter
+
+Sample Prerequisites:
+    - vCenter
+"""
+
+# Create argument parser for standard inputs:
+# server, username, password, cleanup and skipverification
+parser = sample_cli.build_arg_parser()
+
+# Add your custom input arguments
+parser.add_argument('--vm_name',
+                    action='store',
+                    default='Sample_Default_VM_for_Simple_Testbed',
+                    help='Name of the testing vm')
+
+args = sample_util.process_cli_args(parser.parse_args())
+
+# Skip server cert verification if needed.
+# This is not recommended in production code.
+session = get_unverified_session() if args.skipverification else None
+
+# Connect to vSphere client
+client = create_vsphere_client(server=args.server,
+                               username=args.username,
+                               password=args.password,
+                               session=session)
+
+# List VMs
+filter_spec = VM.FilterSpec(names=set([args.vm_name]))
+vms = client.vcenter.VM.list(filter_spec)
+print(vms)

sample_template/sample_template_complex.py

@@ -38,7 +38,7 @@ class Sample(object):
         parser = sample_cli.build_arg_parser()
 
         # Add your custom input arguments
-        parser.add_argument('-n', '--vm_name',
+        parser.add_argument('--vm_name',
                             action='store',
                             default='Sample_Default_VM_for_Simple_Testbed',
                             help='Name of the testing vm')