add basic python async getting started example

content/_code-samples/get-started/py/base.py

@@ -0,0 +1,16 @@
+import asyncio
+from xrpl.asyncio.clients import AsyncWebsocketClient
+
+
+async def main():
+    # Define the network client
+    async with AsyncWebsocketClient("wss://s.altnet.rippletest.net:51233") as client:
+        # inside the context the client is open
+
+        # ... custom code goes here
+
+    # after exiting the context, the client is closed
+
+
+asyncio.run(main())
+