Update app.py

app.py

@@ -1,5 +1,5 @@
 import gradio as gr
-import openai
+from openai import OpenAI
 import smtplib
 from email.mime.text import MIMEText
 from email.mime.multipart import MIMEMultipart
@@ -23,7 +23,7 @@ class POGenerator:
     def __init__(self):
         if not OPENAI_API_KEY:
             raise ValueError("OPENAI_API_KEY not found in environment variables")
-        openai.api_key = OPENAI_API_KEY
+        self.client = OpenAI(api_key=OPENAI_API_KEY)
         self.template_doc = None
         self.load_template()
 
@@ -58,7 +58,7 @@ class POGenerator:
         Please provide values for the following placeholders: {', '.join(placeholders)}
         Format the response as a JSON object with placeholder names as keys."""
 
-        response = openai.ChatCompletion.create(
+        response = self.client.chat.completions.create(
             model="gpt-3.5-turbo",
             messages=[
                 {"role": "system", "content": "You are a professional purchase order generator."},