Update app.py

app.py

@@ -43,6 +43,7 @@ embeddings = OpenAIEmbeddings()
 vectordb = Chroma.from_documents(texts,embeddings)
 chain = RetrievalQA.from_chain_type(llm=OpenAI(temperature=0.0),chain_type="stuff", retriever=vectordb.as_retriever(search_type="mmr"),return_source_documents=True)
 
+
 app = flask.Flask(__name__, template_folder="./")
 # Create a directory in a known location to save files to.
 uploads_dir = os.path.join(app.root_path,'static', 'uploads')