Update app.py

app.py

@@ -10,7 +10,7 @@ from langchain.chains import RetrievalQA
 from langchain.chat_models import ChatOpenAI
 from typing import List
 from together import Together
-
+from langchain.embeddings import  HuggingFaceInstructEmbeddings
 
 import streamlit as st
 from PIL import Image
@@ -129,14 +129,7 @@ class TogetherEmbeddings(Embeddings):
 def get_pdf_index():
     with st.spinner('📄 در حال پردازش فایل PDF...'):
         loader = [PyPDFLoader('test1.pdf')]
-        embeddings = TogetherEmbeddings(
-            model_name="togethercomputer/m2-bert-80M-8k-retrieval",
-            api_key="0291f33aee03412a47fa5d8e562e515182dcc5d9aac5a7fb5eefdd1759005979"
-
-
-
-
-        )
+        embeddings = HuggingFaceInstructEmbeddings(model_name="SajjadAyoubi/xlm-roberta-large-fa-qa")
         return VectorstoreIndexCreator(
             embedding=embeddings,
             text_splitter=RecursiveCharacterTextSplitter(chunk_size=300, chunk_overlap=0)