From 490f4a9ff0c7d3aaddb63831a6d9f0d7c262602b Mon Sep 17 00:00:00 2001
From: Ronald Li <ronailhk@gmail.com>
Date: Mon, 10 Jul 2023 15:02:36 +0800
Subject: [PATCH] Fixes KeyError in AmazonKendraRetriever initializer (#7464)

### Description
argument variable client is marked as required in commit
81e5b1ad362e9e6ec955b6a54776322af82050d0 which breaks the default way of
initialization providing only index_id. This commit avoid KeyError
exception when it is initialized without a client variable
### Dependencies
no dependency required
---
 langchain/retrievers/kendra.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/langchain/retrievers/kendra.py b/langchain/retrievers/kendra.py
index 7d0e2084ac..796623ead5 100644
--- a/langchain/retrievers/kendra.py
+++ b/langchain/retrievers/kendra.py
@@ -207,7 +207,7 @@ class AmazonKendraRetriever(BaseRetriever):
 
     @root_validator(pre=True)
     def create_client(cls, values: Dict[str, Any]) -> Dict[str, Any]:
-        if values["client"] is not None:
+        if values.get("client") is not None:
             return values
 
         try: