Update app.py

app.py

@@ -1,7 +1,7 @@
 import gradio as gr
-from langchain.document_loaders import PyPDFLoader
-from langchain.vectorstores import FAISS
-from langchain.llms import HuggingFaceLLM
+from langchain_community.document_loaders import PyPDFLoader
+from langchain_community.vectorstores import FAISS
+from langchain_community.llms import HuggingFaceLLM
 from langchain.chains import MapReduceChain
 from langchain.text_splitter import RecursiveCharacterTextSplitter
 from langchain.embeddings import HuggingFaceEmbeddings
@@ -10,7 +10,7 @@ import os
 
 # Load model and embeddings
 embedding_model = HuggingFaceEmbeddings(model_name="sentence-transformers/all-MiniLM-L6-v2", device="cpu")
-llm = HuggingFaceLLM.from_pretrained("your-model")
+llm = HuggingFaceLLM(model_name="llama2")
 
 def process_pdf_and_summarize(file):
     try: