From 22b3a233b87090e7ab71c9b5235c401d95d7faa5 Mon Sep 17 00:00:00 2001
From: Nuno Campos <nuno@langchain.dev>
Date: Wed, 27 Dec 2023 22:12:32 -0800
Subject: [PATCH] Update passthrough.py (#15252)

<!-- Thank you for contributing to LangChain!

Please title your PR "<package>: <description>", where <package> is
whichever of langchain, community, core, experimental, etc. is being
modified.

Replace this entire comment with:
  - **Description:** a description of the change,
  - **Issue:** the issue # it fixes if applicable,
  - **Dependencies:** any dependencies required for this change,
- **Twitter handle:** we announce bigger features on Twitter. If your PR
gets announced, and you'd like a mention, we'll gladly shout you out!

Please make sure your PR is passing linting and testing before
submitting. Run `make format`, `make lint` and `make test` from the root
of the package you've modified to check this locally.

See contribution guidelines for more information on how to write/run
tests, lint, etc: https://python.langchain.com/docs/contributing/

If you're adding a new integration, please include:
1. a test for the integration, preferably unit tests that do not rely on
network access,
2. an example notebook showing its use. It lives in
`docs/docs/integrations` directory.

If no one reviews your PR within a few days, please @-mention one of
@baskaryan, @eyurtsev, @hwchase17.
 -->
---
 libs/core/langchain_core/runnables/passthrough.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libs/core/langchain_core/runnables/passthrough.py b/libs/core/langchain_core/runnables/passthrough.py
index 66c9b420c41..9ff41d8d21e 100644
--- a/libs/core/langchain_core/runnables/passthrough.py
+++ b/libs/core/langchain_core/runnables/passthrough.py
@@ -647,7 +647,7 @@ class RunnablePick(RunnableSerializable[Dict[str, Any], Dict[str, Any]]):
         self,
         input: Iterator[Dict[str, Any]],
         config: Optional[RunnableConfig] = None,
-        **kwargs: Any | None,
+        **kwargs: Any,
     ) -> Iterator[Dict[str, Any]]:
         yield from self._transform_stream_with_config(
             input, self._transform, config, **kwargs