From f97ac92f00c61f09320a6640d53da2b41c31485e Mon Sep 17 00:00:00 2001
From: Gor Hayrapetyan <gor.hayrapetyan@gmail.com>
Date: Sun, 22 Sep 2024 05:56:24 +0400
Subject: [PATCH] community[patch]: Handle empty PR body in get_pull_request in
 Github utility (#26739)

**Description:**
When PR body is empty `get_pull_request` method fails with bellow
exception.


**Issue:**
```
TypeError('expected string or buffer')Traceback (most recent call last):


  File ".../.venv/lib/python3.9/site-packages/langchain_core/tools/base.py", line 661, in run
    response = context.run(self._run, *tool_args, **tool_kwargs)


  File ".../.venv/lib/python3.9/site-packages/langchain_community/tools/github/tool.py", line 52, in _run
    return self.api_wrapper.run(self.mode, query)


  File ".../.venv/lib/python3.9/site-packages/langchain_community/utilities/github.py", line 816, in run
    return json.dumps(self.get_pull_request(int(query)))


  File ".../.venv/lib/python3.9/site-packages/langchain_community/utilities/github.py", line 495, in get_pull_request
    add_to_dict(response_dict, "body", pull.body)


  File ".../.venv/lib/python3.9/site-packages/langchain_community/utilities/github.py", line 487, in add_to_dict
    tokens = get_tokens(value)


  File ".../.venv/lib/python3.9/site-packages/langchain_community/utilities/github.py", line 483, in get_tokens
    return len(tiktoken.get_encoding("cl100k_base").encode(text))


  File "....venv/lib/python3.9/site-packages/tiktoken/core.py", line 116, in encode
    if match := _special_token_regex(disallowed_special).search(text):


TypeError: expected string or buffer
```

**Twitter:**  __gorros__
---
 libs/community/langchain_community/utilities/github.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libs/community/langchain_community/utilities/github.py b/libs/community/langchain_community/utilities/github.py
index a2639532872..56426ca8343 100644
--- a/libs/community/langchain_community/utilities/github.py
+++ b/libs/community/langchain_community/utilities/github.py
@@ -492,7 +492,7 @@ class GitHubAPIWrapper(BaseModel):
         response_dict: Dict[str, str] = {}
         add_to_dict(response_dict, "title", pull.title)
         add_to_dict(response_dict, "number", str(pr_number))
-        add_to_dict(response_dict, "body", pull.body)
+        add_to_dict(response_dict, "body", pull.body if pull.body else "")
 
         comments: List[str] = []
         page = 0