From 5fc2c578cf8962a717febb02952829491fb5f83e Mon Sep 17 00:00:00 2001
From: William FH <13333726+hinthornw@users.noreply.github.com>
Date: Sun, 17 Dec 2023 20:02:18 -0800
Subject: [PATCH] [Bugfix] Ensure tool output is a str, for OAI Assistant
 (#14830)

Tool outputs have to be strings apparently. Ensure they are formatted
correctly before passing as intermediate steps.


```
BadRequestError: Error code: 400 - {'error': {'message': '1 validation error for Request\nbody -> tool_outputs -> 0 -> output\n  str type expected (type=type_error.str)', 'type': 'invalid_request_error', 'param': None, 'code': None}}
```
---
 libs/langchain/langchain/agents/openai_assistant/base.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libs/langchain/langchain/agents/openai_assistant/base.py b/libs/langchain/langchain/agents/openai_assistant/base.py
index 60c0c16a97..d1a45f9c76 100644
--- a/libs/langchain/langchain/agents/openai_assistant/base.py
+++ b/libs/langchain/langchain/agents/openai_assistant/base.py
@@ -288,7 +288,7 @@ class OpenAIAssistantRunnable(RunnableSerializable[Dict, OutputType]):
             tc.id for tc in run.required_action.submit_tool_outputs.tool_calls
         }
         tool_outputs = [
-            {"output": output, "tool_call_id": action.tool_call_id}
+            {"output": str(output), "tool_call_id": action.tool_call_id}
             for action, output in intermediate_steps
             if action.tool_call_id in required_tool_call_ids
         ]