Add examples

examples/greeter/cli/python/rpc_client.py

@@ -0,0 +1,22 @@
+import requests
+import json
+
+
+def main():
+    url = "http://localhost:4000"
+    headers = {'content-type': 'application/json'}
+
+    # Example echo method
+    payload = {
+        "method": "Say.Hello",
+        "params": [{"name": "John"}],
+        "jsonrpc": "2.0",
+        "id": 0,
+    }
+    response = requests.post(
+        url, data=json.dumps(payload), headers=headers).json()
+
+    print response["result"]
+
+if __name__ == "__main__":
+    main()