From d54b977d4e31f31765b8113a2c520058503d0bd9 Mon Sep 17 00:00:00 2001
From: Peter Stolz <50801264+PeterStolz@users.noreply.github.com>
Date: Thu, 20 Apr 2023 19:46:51 +0200
Subject: [PATCH] Fix docstring of RetrievalQA (#3231)

Structure changed an RetrievalQA now expects BaseRetriever not
VectorStore
---
 langchain/chains/retrieval_qa/base.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/langchain/chains/retrieval_qa/base.py b/langchain/chains/retrieval_qa/base.py
index bcc26b16..dc1d68bf 100644
--- a/langchain/chains/retrieval_qa/base.py
+++ b/langchain/chains/retrieval_qa/base.py
@@ -154,8 +154,9 @@ class RetrievalQA(BaseRetrievalQA):
             from langchain.llms import OpenAI
             from langchain.chains import RetrievalQA
             from langchain.faiss import FAISS
-            vectordb = FAISS(...)
-            retrievalQA = RetrievalQA.from_llm(llm=OpenAI(), retriever=vectordb)
+            from langchain.vectorstores.base import VectorStoreRetriever
+            retriever = VectorStoreRetriever(vectorstore=FAISS(...))
+            retrievalQA = RetrievalQA.from_llm(llm=OpenAI(), retriever=retriever)
 
     """