fix import summarize chain

app.py

@@ -2,11 +2,14 @@ import os
 import sys
 import subprocess
 
-subprocess.run(["git", "lfs", "install"])
-subprocess.run(["git", "clone", "https://huggingface.co/K024/ChatGLM-6b-onnx-u8s8"])
-os.chdir("ChatGLM-6b-onnx-u8s8")
-subprocess.run(["pip", "install", "-r", "requirements.txt"])
-sys.path.append(os.getcwd())
+if not os.path.exists("ChatGLM-6b-onnx-u8s8"):
+    subprocess.run(["git", "lfs", "install"])
+    subprocess.run(["git", "clone", "https://huggingface.co/K024/ChatGLM-6b-onnx-u8s8"])
+    os.chdir("ChatGLM-6b-onnx-u8s8")
+    subprocess.run(["pip", "install", "-r", "requirements.txt"])
+    sys.path.append(os.getcwd())
+else:
+    sys.path.append(os.path.join(os.getcwd(), "ChatGLM-6b-onnx-u8s8"))
 
 from model import ChatGLMModel#, chat_template
 
@@ -61,7 +64,7 @@ import gradio as gr
 from langchain.prompts import PromptTemplate
 from langchain.docstore.document import Document
 from langchain.text_splitter import RecursiveCharacterTextSplitter
-from langchain.chains.question_answering import load_summarize_chain
+from langchain.chains.summarize import load_summarize_chain
 # from langchain.chains.question_answering import load_qa_chain
 # from langchain.embeddings import HuggingFaceEmbeddings
 # from langchain.vectorstores import Chroma