Add example Python code to README.md.

Author: byronnlandry

README.md

@@ -86,3 +86,169 @@ pinecone.init(api_key="YOUR_API_KEY", environment="us-west1-gcp")
 
 pinecone.delete_index("example-index")
 ```
+
+## Scale replicas
+
+The following example changes the number of replicas for `example-index`.
+
+```python
+import pinecone
+
+pinecone.init(api_key="YOUR_API_KEY", environment="us-west1-gcp")
+
+new_number_of_replicas = 4
+pinecone.configure_index("example-index", replicas=new_number_of_replicas)
+```
+
+## Describe index statistics
+
+The following example returns statistics about the index `example-index`.
+
+```python
+import pinecone
+
+pinecone.init(api_key="YOUR_API_KEY", environment="us-west1-gcp")
+index = pinecone.Index("example-index")
+
+index_stats_response = index.describe_index_stats()
+```
+
+## Query an index
+
+The following example queries the index `example-index` with metadata
+filtering.
+
+```python
+import pinecone
+
+pinecone.init(api_key="YOUR_API_KEY", environment="us-west1-gcp")
+index = pinecone.Index("example-index")
+
+query_response = index.query(
+    namespace="example-namespace",
+    top_k=10,
+    include_values=True,
+    include_metadata=True,
+    vector=[0.1, 0.2, 0.3, 0.4],
+    filter={
+        "genre": {"$in": ["comedy", "documentary", "drama"]}
+    }
+)
+```
+
+## Delete vectors
+
+The following example deletes vectors by ID.
+
+```python
+import pinecone
+
+pinecone.init(api_key="YOUR_API_KEY", environment="us-west1-gcp")
+index = pinecone.Index("example-index")
+
+delete_response = index.delete(ids=["vec1", "vec2"], namespace="example-namespace")
+```
+
+## Fetch vectors
+
+The following example fetches vectors by ID.
+
+```python
+import pinecone
+
+pinecone.init(api_key="YOUR_API_KEY", environment="us-west1-gcp")
+index = pinecone.Index("example-index")
+
+fetch_response = index.fetch(ids=["vec1", "vec2"], namespace="example-namespace")
+```
+
+
+## Update vectors
+
+The following example updates vectors by ID.
+
+```python
+import pinecone
+
+pinecone.init(api_key="YOUR_API_KEY", environment="us-west1-gcp")
+index = pinecone.Index("example-index")
+
+update_response = index.update(
+    id="vec1",
+    values=[0.1, 0.2, 0.3, 0.4],
+    set_metadata={"genre": "drama"},
+    namespace="example-namespace"
+)
+```
+
+## Upsert vectors
+
+The following example upserts vectors to `example-index`.
+
+```python
+import pinecone
+
+pinecone.init(api_key="YOUR_API_KEY", environment="us-west1-gcp")
+index = pinecone.Index("example-index")
+
+upsert_response = index.upsert(
+    vectors=[
+        ("vec1", [0.1, 0.2, 0.3, 0.4], {"genre": "drama"}),
+        ("vec2", [0.2, 0.3, 0.4, 0.5], {"genre": "action"}),
+    ],
+    namespace="example-namespace"
+)
+```
+
+## Create collection
+
+The following example creates the collection `example-collection` from
+`example-index`.
+
+```python
+import pinecone
+
+pinecone.init(api_key="YOUR_API_KEY",
+              environment="us-west1-gcp")
+
+pinecone.create_collection("example-collection", "example-index")
+```
+
+## List collections
+
+The following example returns a list of the collections in the current project.
+
+```python
+import pinecone
+
+pinecone.init(api_key="YOUR_API_KEY", environment="us-west1-gcp")
+
+active_collections = pinecone.list_collections()
+```
+
+## Describe a collection
+
+The following example returns a description of the collection
+`example-collection`.
+
+```python
+import pinecone
+
+pinecone.init(api_key="YOUR_API_KEY", environment="us-west1-gcp")
+
+collection_description = pinecone.describe_collection("example-collection")
+```
+
+## Delete a collection
+
+The following example deletes the collection `example-collection`.
+
+```python
+import pinecone
+
+pinecone.init(api_key="YOUR_API_KEY", environment="us-west1-gcp")
+
+pinecone.delete_collection("example-collection")
+```
+
+