Update app.py

app.py

@@ -13,7 +13,9 @@ import base64
 # --- Constants ---
 DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"
 LANGFUSE_PUBLIC_KEY="pk-lf-7f0677a5-09f7-4508-88a2-bf7f44ee172c"
-LF_SECRET_KEY = os.environ.get["LANGFUSE_SECRET_KEY"]
+LF_SECRET_KEY = os.environ.get("LANGFUSE_SECRET_KEY")
+if LF_SECRET_KEY is None:
+    raise EnvironmentError("LANGFUSE_SECRET_KEY environment variable is not set.")
 LANGFUSE_AUTH=base64.b64encode(f"{LANGFUSE_PUBLIC_KEY}:{LF_SECRET_KEY}".encode()).decode()
 
 from opentelemetry.sdk.trace import TracerProvider
@@ -191,5 +193,5 @@ if __name__ == "__main__":
 
     print("-"*(60 + len(" App Starting ")) + "\n")
 
-    print("Launching Gradio Interface for Basic Agent Evaluation...")
+    print("Launching Gradio Interface for Mag Agent Evaluation...")
     demo.launch(debug=True, share=False)