Add application file

app.py

@@ -1,6 +1,7 @@
 from langchain.chat_models import ChatOpenAI
 from langchain.schema import AIMessage, HumanMessage
 import openai
+import os
 import gradio as gr
 
 os.environ["OPENAI_API_KEY"] = "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"  # Replace with your key
@@ -16,4 +17,4 @@ def predict(message, history):
     gpt_response = llm(history_langchain_format)
     return gpt_response.content
 
-gr.ChatInterface(predict).launch()
+gr.ChatInterface(predict).launch()