Add create index examples to README.md file.

Author: byronnlandry

README.md

@@ -20,4 +20,33 @@ Or a specific development version:
 pip install git+https://[email protected]/pinecone-io/pinecone-python-client.git
 pip install git+https://[email protected]/pinecone-io/pinecone-python-client.git@example-branch-name
 pip install git+https://[email protected]/pinecone-io/pinecone-python-client.git@259deff
-```
+```
+
+## Creating an index
+
+The following example creates an index without a metadata
+configuration. By default, Pinecone indexes all metadata.
+
+```python
+
+import pinecone
+
+
+pinecone.init(api_key="YOUR_API_KEY",
+              environment="us-west1-gcp")
+
+pinecone.create_index("example-index", dimension=1024)
+```
+
+The following example creates an index that only indexes
+the "color" metadata field. Queries against this index
+cannot filter based on any other metadata field.
+
+```python
+metadata_config = {
+    "indexed": ["color"]
+}
+
+pinecone.create_index("example-index-2", dimension=1024,
+                      metadata_config=metadata_config)
+```