Bigtable: Create Instanceadmin sample (#1664)

* Python instanceadmin sample

instanceadmin python sample

* Updated instanceadmin.py

* modify instanceadmin as per comments

* Update instanceadmin.py as per the local review comments.

* Update instanceadmin

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bigtable/instanceadmin/README.rst

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+.. This file is automatically generated. Do not edit this file directly.
+
+
+Google Cloud Bigtable table creation
+===============================================================================
+
+https://cloud.google.com/bigtable/docs/quickstart-cbt
+
+This page explains how to use the cbt command to connect to a Cloud Bigtable instance, perform basic administrative tasks, and read and write data in a table.
+
+Google Cloud Bigtable Python Samples
+===============================================================================
+
+.. image:: https://gstatic.com/cloudssh/images/open-btn.png
+   :target: https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/GoogleCloudPlatform/python-docs-samples&page=editor&open_in_editor=bigtable/hello/README.rst
+
+
+This directory contains samples for Google Cloud Bigtable. `Google Cloud Bigtable`_ is Google's NoSQL Big Data database service. It's the same database that powers many core Google services, including Search, Analytics, Maps, and Gmail.
+
+
+
+
+.. _Google Cloud Bigtable: https://cloud.google.com/bigtable/docs
+
+Setup
+-------------------------------------------------------------------------------
+
+
+Authentication
+++++++++++++++
+
+This sample requires you to have authentication setup. Refer to the
+`Authentication Getting Started Guide`_ for instructions on setting up
+credentials for applications.
+
+.. _Authentication Getting Started Guide:
+    https://cloud.google.com/docs/authentication/getting-started
+
+Install Dependencies
+++++++++++++++++++++
+
+#. Clone python-docs-samples and change directory to the sample directory you want to use.
+
+    .. code-block:: bash
+
+        $ git clone https://github.com/GoogleCloudPlatform/python-docs-samples.git
+
+#. Install `pip`_ and `virtualenv`_ if you do not already have them. You may want to refer to the `Python Development Environment Setup Guide`_ for Google Cloud Platform for instructions.
+
+   .. _Python Development Environment Setup Guide:
+       https://cloud.google.com/python/setup
+
+#. Create a virtualenv. Samples are compatible with Python 2.7 and 3.4+.
+
+    .. code-block:: bash
+
+        $ virtualenv env
+        $ source env/bin/activate
+
+#. Install the dependencies needed to run the samples.
+
+    .. code-block:: bash
+
+        $ pip install -r requirements.txt
+
+.. _pip: https://pip.pypa.io/
+.. _virtualenv: https://virtualenv.pypa.io/
+
+Samples
+-------------------------------------------------------------------------------
+
+Basic example
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+
+.. image:: https://gstatic.com/cloudssh/images/open-btn.png
+   :target: https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/GoogleCloudPlatform/python-docs-samples&page=editor&open_in_editor=bigtable/instanceadmin.py,bigtable/instanceadmin/README.rst
+
+
+
+
+To run this sample:
+
+.. code-block:: bash
+
+    $ python instanceadmin.py
+
+    usage: instanceadmin.py [-h] [run] [dev-instance] [del-instance] [add-cluster] [del-cluster] project_id instance_id cluster_id
+
+    Demonstrates how to connect to Cloud Bigtable and run some basic operations
+    to create instance, create cluster, delete instance and delete cluster. 
+    Prerequisites: - Create a Cloud Bigtable cluster.
+    https://cloud.google.com/bigtable/docs/creating-cluster - Set your Google
+    Application Default Credentials.
+    https://developers.google.com/identity/protocols/application-default-
+    credentials
+
+    positional arguments:
+      project_id     Your Cloud Platform project ID.
+      instance_id    ID of the Cloud Bigtable instance to connect to.
+      cluster_id    ID of the Cloud Bigtable cluster to connect to.
+
+    optional arguments:
+      -h, --help     show this help message and exit
+
+The client library
+-------------------------------------------------------------------------------
+
+This sample uses the `Google Cloud Client Library for Python`_.
+You can read the documentation for more details on API usage and use GitHub
+to `browse the source`_ and  `report issues`_.
+
+.. _Google Cloud Client Library for Python:
+    https://googlecloudplatform.github.io/google-cloud-python/
+.. _browse the source:
+    https://github.com/GoogleCloudPlatform/google-cloud-python
+.. _report issues:
+    https://github.com/GoogleCloudPlatform/google-cloud-python/issues
+
+
+.. _Google Cloud SDK: https://cloud.google.com/sdk/

bigtable/instanceadmin/README.rst.in

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+# This file is used to generate README.rst
+
+product:
+  name: Google Cloud Bigtable and run some basic operations.
+  short_name: Cloud Bigtable
+  url: https://cloud.google.com/bigtable/docs
+  description: > 
+    `Google Cloud Bigtable`_ is Google's NoSQL Big Data database service. It's
+    the same database that powers many core Google services, including Search,
+    Analytics, Maps, and Gmail.
+
+setup:
+- auth
+- install_deps
+
+samples:
+- name: Basic example with Bigtable Column family and GC rules.
+  file: instanceadmin.py
+  show_help: true
+
+cloud_client_library: true
+
+folder: bigtable/instanceadmin