Update app.py

app.py

@@ -4,7 +4,7 @@ import requests
 import pandas as pd
 from dotenv import load_dotenv
 from langchain_openai import ChatOpenAI
-#from langchain_nvidia_ai_endpoints import ChatNVIDIA
+from langchain_nvidia_ai_endpoints import ChatNVIDIA
 
 # Load environment variables
 load_dotenv()
@@ -14,8 +14,8 @@ DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"
 
 # --- Basic Agent Definition ---
 class BasicAgent:
-    def __init__(self):
-        self.llm = ChatOpenAI(model="gpt-4o-mini",streaming=False,base_url="https://aiproxy.sanand.workers.dev/openai/v1",api_key=os.getenv("AIPROXY_TOKEN"))
+    def __init__(self): 
+        llm=ChatNVIDIA(model="meta/llama-3.3-70b-instruct",nvidia_api_key=os.getenv("NVIDIA_API_KEY"))
         self.instructions = """You are a helpful assistant. For every question, reply with only the answer—no explanation, "
             "no units, and no extra words. If the answer is a number, just return the number. "
             "If it is a word or phrase, return only that. If it is a list, return a comma-separated list with no extra words. "