update app.py

app.py

@@ -1,3 +1,4 @@
+import os
 import streamlit as st
 from llama_index.core import VectorStoreIndex, SimpleDirectoryReader, Settings
 from llama_index.embeddings.huggingface import HuggingFaceEmbedding
@@ -11,10 +12,13 @@ callback_manager = CallbackManager()
 #model = "internlm2.5-latest"
 #api_key = "请填写 API Key"     #这里输入https://internlm.intern-ai.org.cn/api/里面的api key
 
+#下载词向量模型
+os.system('git lfs install')
+os.system('git clone https://www.modelscope.cn/Ceceliachenen/paraphrase-multilingual-MiniLM-L12-v2.git')
+
 api_base_url =  "https://api.siliconflow.cn/v1"
 model = "internlm/internlm2_5-7b-chat"
 api_key = "sk-xizegjwrnlqidibfrcdmgreuipoxpbbmenvpzptpbyxehclf"      #这里输入硅基流动上面的api key
-
 llm =OpenAILike(model=model, api_base=api_base_url, api_key=api_key, is_chat_model=True,callback_manager=callback_manager)
 
 st.set_page_config(page_title="llamaindexRAG_lMAPI", page_icon="🦜🔗")