diff --git a/gpu_mnist_example/train_gpu.py b/gpu_mnist_example/train_gpu.py
index bb2f938..f163b42 100644
--- a/gpu_mnist_example/train_gpu.py
+++ b/gpu_mnist_example/train_gpu.py
@@ -12,7 +12,7 @@ If there are Chinese comments in the code，please add at the beginning：
 
 '''
 
-import os
+
 from model import Model
 import numpy as np
 import torch
@@ -22,6 +22,7 @@ from torch.optim import SGD
 from torch.utils.data import DataLoader
 from torchvision.transforms import ToTensor
 import argparse
+import os
 #导入openi包
 from openi.context import prepare, upload_openi