Update README.md examples to be consistent with doc examples

Signed-off-by: Rushi Agrawal <[email protected]>

README.md

@@ -21,37 +21,119 @@ OpenSearch Python Client
 
 This is the low-level client. A high-level Python client is in the works, and will be available soon.
 
-## Example use
+## Setup
 
-```python
+To add the client to your project, install it using [pip](https://pip.pypa.io/):
-
->>> from datetime import datetime
->>> from opensearch import OpenSearch
-
-# by default we connect to localhost:9200
->>> client = OpenSearch()
-
-# create an index in OpenSearch, ignore status code 400 (index already exists)
->>> client.indices.create(index='my-index', ignore=400)
-{'acknowledged': True, 'shards_acknowledged': True, 'index': 'my-index'}
-
-# datetimes will be serialized
->>> client.index(index="my-index", id=42, body={"any": "data", "timestamp": datetime.now()})
-{'_index': 'my-index',
-    '_type': '_doc',
-    '_id': '42',
-    '_version': 1,
-    'result': 'created',
-    '_shards': {'total': 2, 'successful': 1, 'failed': 0},
-    '_seq_no': 0,
-    '_primary_term': 1}
-
-# but not deserialized
->>> client.get(index="my-index", id=42)['_source']
-{'any': 'data', 'timestamp': '2019-05-17T17:28:10.329598'}
 
+```bash
+pip install git+https://github.com/opensearch-project/opensearch-py.git
 ```
 
+Then import it like any other module:
+
+```python
+from opensearch import OpenSearch
+```
+
+If you prefer to add the client manually or just want to examine the source code, see [opensearch-py on GitHub](https://github.com/opensearch-project/opensearch-py).
+
+
+## Sample code
+
+```python
+from opensearch import OpenSearch
+
+host = 'localhost'
+port = 9200
+auth = ('admin', 'admin') # For testing only. Don't store credentials in code.
+ca_certs_path = '/full/path/to/root-ca.pem' # Provide a CA bundle if you use intermediate CAs with your root CA.
+
+# Optional client certificates if you don't want to use HTTP basic authentication.
+# client_cert_path = '/full/path/to/client.pem'
+# client_key_path = '/full/path/to/client-key.pem'
+
+# Create the client with SSL/TLS enabled, but hostname verification disabled.
+client = OpenSearch(
+    hosts = [{'host': host, 'port': port}],
+    http_compress = True, # enables gzip compression for request bodies
+    http_auth = auth,
+    # client_cert = client_cert_path,
+    # client_key = client_key_path,
+    use_ssl = True,
+    verify_certs = True,
+    ssl_assert_hostname = False,
+    ssl_show_warn = False,
+    ca_certs = ca_certs_path
+)
+
+# Create an index with non-default settings.
+index_name = 'python-test-index3'
+index_body = {
+  'settings': {
+    'index': {
+      'number_of_shards': 4
+    }
+  }
+}
+
+response = client.indices.create(index_name, body=index_body)
+print('\nCreating index:')
+print(response)
+
+# Add a document to the index.
+document = {
+  'title': 'Moneyball',
+  'director': 'Bennett Miller',
+  'year': '2011'
+}
+id = '1'
+
+response = client.index(
+    index = index_name,
+    body = document,
+    id = id,
+    refresh = True
+)
+
+print('\nAdding document:')
+print(response)
+
+# Search for the document.
+q = 'miller'
+query = {
+  'size': 5,
+  'query': {
+    'multi_match': {
+      'query': q,
+      'fields': ['title^2', 'director']
+    }
+  }
+}
+
+response = client.search(
+    body = query,
+    index = index_name
+)
+print('\nSearch results:')
+print(response)
+
+# Delete the document.
+response = client.delete(
+    index = index_name,
+    id = id
+)
+
+print('\nDeleting document:')
+print(response)
+
+# Delete the index.
+response = client.indices.delete(
+    index = index_name
+)
+
+print('\nDeleting index:')
+print(response)
+```
 
 ## Project Resources