change doc search type to mmr

app.py

@@ -37,7 +37,8 @@ class AASLDConversationalAgent():
             encode_kwargs={'normalize_embeddings': False}
             )
         self.doc_search = FAISS.from_documents(pages, embeddings_model)
-        self.doc_retriever = self.doc_search.as_retriever()
+        self.doc_retriever = self.doc_search.as_retriever(
+            search_type="mmr", search_kwargs={"k": 100})
         self.llm = ChatOpenAI(temperature = 0, model_name=LLM_MODEL)
         tool = create_retriever_tool(
             self.doc_retriever,