Update app.py

app.py

@@ -16,6 +16,11 @@ import json
 #Sri Laxmi Youtube:https://www.youtube.com/watch?v=SkY2u4UUr6M&t=112s
 ###############
 
+#Model loading
+tokenizer = RagTokenizer.from_pretrained("facebook/rag-token-nq")
+retriever = RagRetriever.from_pretrained("facebook/rag-token-nq", index_name="exact", use_dummy_dataset=True)
+model = RagTokenForGeneration.from_pretrained("facebook/rag-token-nq", retriever=retriever)
+
 st.set_page_config(page_title="Gemini RAG", layout="wide")
 
 # This is the first API key input; no need to repeat it in the main function.