CharacterTextSplitter -> RecursiveCharacterTextSplitter

langchain-streamlit-demo/app.py

@@ -18,7 +18,7 @@ from langchain.embeddings import OpenAIEmbeddings
 from langchain.memory import ConversationBufferMemory, StreamlitChatMessageHistory
 from langchain.prompts import ChatPromptTemplate, MessagesPlaceholder
 from langchain.schema.retriever import BaseRetriever
-from langchain.text_splitter import CharacterTextSplitter
+from langchain.text_splitter import RecursiveCharacterTextSplitter
 from langchain.vectorstores import FAISS
 from langsmith.client import Client
 from streamlit_feedback import streamlit_feedback
@@ -127,7 +127,7 @@ def get_retriever(
 
         loader = PyPDFLoader(temp_file.name)
         documents = loader.load()
-        text_splitter = CharacterTextSplitter(
+        text_splitter = RecursiveCharacterTextSplitter(
             chunk_size=chunk_size,
             chunk_overlap=chunk_overlap,
         )