From dcb31f3f2ab729a8207beb9023d87b926a8d69b2 Mon Sep 17 00:00:00 2001
From: "google-labs-jules[bot]"
 <161369871+google-labs-jules[bot]@users.noreply.github.com>
Date: Wed, 2 Jul 2025 20:27:38 +0000
Subject: [PATCH] Fix: Add missing Union import in runners.py

Resolves NameError when using LangchainTool with run_live due to `get_type_hints` not finding the definition for `Union`.

Addresses google/adk-python#1720
---
 src/google/adk/runners.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/google/adk/runners.py b/src/google/adk/runners.py
index 017997bb3..9456a5f4b 100644
--- a/src/google/adk/runners.py
+++ b/src/google/adk/runners.py
@@ -20,6 +20,7 @@
 from typing import AsyncGenerator
 from typing import Generator
 from typing import Optional
+from typing import Union
 import warnings
 
 from google.genai import types