Update app.py

app.py

@@ -1,15 +1,16 @@
 import os
 import functools
-import openai
+from openai import OpenAI
 import tiktoken
 import gradio as gr
 
-# Configure API key
-openai.api_key = os.getenv("OPENAI_API_KEY")
-if not openai.api_key:
+# Configure API client
+api_key = os.getenv("OPENAI_API_KEY")
+if not api_key:
     raise ValueError("Please set the OPENAI_API_KEY environment variable.")
+client = OpenAI(api_key=api_key)
 
-# Available models (comma-separated in env or fallback list)
+# Available models (comma-separated in env or fallback)
 _env_models = os.getenv("OPENAI_MODEL_LIST", "gpt-3.5-turbo,gpt-4")
 ALL_MODELS = [m.strip() for m in _env_models.split(",") if m.strip()]
 if not ALL_MODELS:
@@ -32,13 +33,11 @@ def read_file_content(file_obj):
     if not file_obj:
         return ""
     try:
-        # If filepath, open and read
         if isinstance(file_obj, str):
             with open(file_obj, 'r', encoding='utf-8') as f:
                 content = f.read()
             name = os.path.basename(file_obj)
         else:
-            # file_obj is a file-like object
             name = getattr(file_obj, 'name', 'uploaded_file')
             content = file_obj.read().decode('utf-8')
         return f"\n\n--- Start of file: {name} ---\n{content}\n--- End of file ---\n"
@@ -48,13 +47,12 @@ def read_file_content(file_obj):
 # Chat response function
 def respond(message, history, model_name, file_obj):
     history = history or []
-    # Attach file content if uploaded
     file_text = read_file_content(file_obj)
-    full_input = message + file_text
+    full_input = (message or "") + file_text
 
-    # Send to OpenAI
+    # Call OpenAI chat completion
     messages = [{"role": "user", "content": full_input}]
-    resp = openai.ChatCompletion.create(
+    resp = client.chat.completions.create(
         model=model_name,
         messages=messages
     )
@@ -77,7 +75,6 @@ with gr.Blocks() as demo:
     file_upload = gr.File(label="Upload File", file_types=[".txt", ".md", ".py"], type="filepath")
     user_input = gr.Textbox(placeholder="Type your message...", show_label=False)
 
-    # Link interactions
     user_input.submit(respond,
                       inputs=[user_input, chatbot, model_dropdown, file_upload],
                       outputs=chatbot)