Update app.py

app.py

@@ -1,7 +1,8 @@
 """
 Question Answering with Retrieval QA and LangChain Language Models featuring FAISS vector stores.
 This script uses the LangChain Language Model API to answer questions using Retrieval QA 
-and FAISS vector stores. It also uses the OpenAI API to generate responses.
+and FAISS vector stores. It also uses the Mistral huggingface inference endpoint to 
+generate responses.
 """
 
 import os
@@ -143,7 +144,9 @@ def handle_userinput(user_question):
 
 
 def main():
-    
+    """
+    Putting it all together.
+    """
     st.set_page_config(
         page_title="Chat with a Bot that tries to answer questions about multiple PDFs",
         page_icon=":books:",