Update app.py

app.py

@@ -72,7 +72,7 @@ def invoke(openai_api_key, rag_option, prompt):
 
 gr.close_all()
 
-demo = gr.Interface(fn=invoke, 
+demo = gr.Interface(fn = invoke, 
                     inputs = [gr.Textbox(label = "OpenAI API Key", type = "password", lines = 1), 
                               gr.Radio([RAG_OFF, RAG_CHROMA, RAG_MONGODB], label = "Retrieval-Augmented Generation", value = RAG_OFF),
                               gr.Textbox(label = "Prompt", value = "What are GPT-4's media capabilities in 5 emojis and 1 sentence?", lines = 1),