diff --git a/src-ui/logics/useStdoutToPython.js b/src-ui/logics/useStdoutToPython.js
index 3c852726..fa7c0e35 100644
--- a/src-ui/logics/useStdoutToPython.js
+++ b/src-ui/logics/useStdoutToPython.js
@@ -2,9 +2,9 @@ import { store } from "@store";
 import { encode } from "js-base64";
 
 export const useStdoutToPython = () => {
-    const asyncStdoutToPython = async (path, value) => {
+    const asyncStdoutToPython = async (path, value = undefined) => {
         let send_object = { endpoint: path };
-        if (value) send_object.data = encode(JSON.stringify(value));
+        if (value !== undefined) send_object.data = encode(JSON.stringify(value));
 
         // send to python
         const backend_subprocess = store.backend_subprocess;