Update OpenAI instructions

app.py

@@ -2,10 +2,10 @@ import pandas as pd
 import gradio as gr
 import numpy as np
 import os
-import openai  # requires OPENAI_API_KEY set as env var
+from openai import OpenAI  # requires OPENAI_API_KEY set as env var
 
 # 1. Configure OpenAI
-openai.api_key = os.getenv("OPENAI_API_KEY")
+client = OpenAI(api_key=os.getenv("OPENAI_API_KEY"))
 MODEL_NAME = "gpt-5"
 
 
@@ -196,7 +196,7 @@ Rules:
 
     try:
         # Ask OpenAI
-        response = openai.ChatCompletion.create(
+        response = client.chat.completions.create(
             model=MODEL_NAME,
             messages=[
                 {"role": "system", "content": "You are a helpful assistant."},
@@ -205,7 +205,7 @@ Rules:
             temperature=0.2,
             max_tokens=1200
         )
-        code = response.choices[0].message["content"].strip()
+        code = response.choices[0].message.content.strip()
 
         # Strip markdown fences if any
         if code.startswith("```"):