Update app.py

app.py

@@ -1,7 +1,9 @@
 import gradio as gr
 from gpt_index import GPTSimpleVectorIndex
+from gpt_index.langchain_helpers.chain_wrapper import OpenAI
 
 index = GPTSimpleVectorIndex.load_from_disk('./index (4).json')
+openai = OpenAI(openai_api_key='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', temperature=0, model_name="text-davinci-003")
 
 def my_model_function(input_text):
     response = index.query(input_text, response_mode="compact")