Update app.py

app.py

@@ -4,12 +4,12 @@ from langchain_community.chat_models import ChatHuggingFace
 from langchain_community.llms import HuggingFaceEndpoint
 from langchain_core.messages import HumanMessage, SystemMessage, AIMessage
 
-# --- Hugging Face token setup ---
+
 hf_token = os.getenv("Data_science")  
 os.environ["HUGGINGFACEHUB_API_KEY"] = hf_token
 os.environ["HF_TOKEN"] = hf_token
 
-# --- Model initialization ---
+
 model = HuggingFaceEndpoint(
     repo_id="meta-llama/Llama-3.2-3B-Instruct",
     provider="nebius",