diff --git a/tools/TrainCNN/backward.py b/tools/TrainCNN/backward.py
index 66f421c..9d21e0a 100755
--- a/tools/TrainCNN/backward.py
+++ b/tools/TrainCNN/backward.py
@@ -103,7 +103,7 @@ def train(dataset, show_bar=False):
 
             if i % 100 == 0:
                 if i % 1000 == 0:
-		    test_samples, test_labels = dataset.sample_test_sets(5000)
+                    test_samples, test_labels = dataset.sample_test_sets(5000)
                     acc = sess.run(accuracy, feed_dict={x: test_samples, y_: test_labels})
                 bar.set_postfix({"loss": loss_value, "acc": acc})
 
@@ -142,8 +142,8 @@ def train(dataset, show_bar=False):
         #     res = sess.run(y, feed_dict={x: im})
         #     res = res.reshape([forward.OUTPUT_NODES])
         #     print(np.argmax(res))
-	
-	test_samples, test_labels = dataset.sample_test_sets(100)
+    
+        test_samples, test_labels = dataset.sample_test_sets(100)
         vars_val = sess.run(vars)
         save_para("/home/xinyang/Desktop/AutoAim/tools/para", vars_val)
         nodes_val = sess.run(nodes, feed_dict={x:test_samples})