fix: python keep alive

src/main.rs

@@ -486,6 +486,9 @@ async fn handle_connection(
 
 				// TODO: Start tournaments
 
+				else if text == "PING" {
+					let _ = send(&tx, "PONG");
+				}
 				else {
                     let _ = send(&tx, "ERROR:UNKNOWN");
                 }