Update import statements and dependencies

app.py

@@ -1,8 +1,10 @@
 import streamlit as st
-from llama_index.core import VectorStoreIndex, SimpleDirectoryReader, Settings
+from llama_index import VectorStoreIndex, SimpleDirectoryReader
+from llama_index import Settings
 from llama_index.embeddings.huggingface import HuggingFaceEmbedding
 from llama_index.llms.huggingface import HuggingFaceLLM
 
+
 st.set_page_config(page_title="llama_index_demo", page_icon="🦜🔗")
 st.title("llama_index_demo")
 

requirements.txt

@@ -2,8 +2,11 @@
 streamlit==1.36.0
 pydantic==1.10.13  # 固定到 1.10.x 版本
 langchain==0.0.350  # 使用较旧的稳定版本
-llama-index==0.9.48
-llama-index-core==0.9.48
+# llama-index 相关
+llama-index>=0.9.48
+llama-index-embeddings-huggingface>=0.1.3
+llama-index-llms-huggingface>=0.2.0
+
 openai==1.58.1
 python-dotenv