Update app.py

app.py

@@ -90,7 +90,7 @@ def torch_update_gpu_status():
     return gpu_status
 
 def update_cpu_status():
-    current_time = datetime.utcnow()
+    current_time = datetime.datetime.utcnow()
     time_str = current_time.strftime("%Y-%m-%d %H:%M:%S")
 
     cpu_percent = psutil.cpu_percent()