diff --git a/contrib/SpatialEmbeddings/infer.py b/contrib/SpatialEmbeddings/infer.py
index c777f2d5e4cac154dc778ec0303b57d58f91e024..9b6c4db891ef54e56fc8881c8941c11dc07e46f9 100644
--- a/contrib/SpatialEmbeddings/infer.py
+++ b/contrib/SpatialEmbeddings/infer.py
@@ -15,14 +15,15 @@ cfg = getattr(config, 'cfg')
 
 cluster = Cluster()
 
+
 # 预测数据集类
 class TestDataSet():
     def __init__(self):
-        self.data_dir = cfg.data_dir 
+        self.data_dir = cfg.data_dir
         self.data_list_file = cfg.data_list_file
         self.data_list = self.get_data_list()
         self.data_num = len(self.data_list)
-    
+
     def get_data_list(self):
         # 获取预测图像路径列表
         data_list = []
@@ -41,7 +42,7 @@ class TestDataSet():
         h, w = img.shape[:2]
         h_new, w_new = cfg.input_size
         img = np.pad(img, ((0, h_new - h), (0, w_new - w), (0, 0)), 'edge')
-        img = img.astype(np.float32)/255.0
+        img = img.astype(np.float32) / 255.0
         img = img.transpose((2, 0, 1))
         img = np.expand_dims(img, axis=0)
         return img
@@ -51,30 +52,33 @@ class TestDataSet():
         img_path = self.data_list[index]
         img = np.array(PILImage.open(img_path))
         if img is None:
-            return img, img,img_path, None
+            return img, img, img_path, None
 
         img_name = img_path.split(os.sep)[-1]
-        name_prefix = img_name.replace('.'+img_name.split('.')[-1],'')
+        name_prefix = img_name.replace('.' + img_name.split('.')[-1], '')
         img_shape = img.shape[:2]
         img_process = self.preprocess(img)
 
         return img_process, name_prefix, img_shape
 
+
 def get_model(main_prog, startup_prog):
     img_shape = [3, cfg.input_size[0], cfg.input_size[1]]
     with fluid.program_guard(main_prog, startup_prog):
         with fluid.unique_name.guard():
-            input = fluid.layers.data(name='image', shape=img_shape, dtype='float32')
+            input = fluid.layers.data(
+                name='image', shape=img_shape, dtype='float32')
             output = SpatialEmbeddings(input)
     return input, output
 
+
 def infer():
     if not os.path.exists(cfg.vis_dir):
         os.makedirs(cfg.vis_dir)
 
     startup_prog = fluid.Program()
     test_prog = fluid.Program()
-    
+
     input, output = get_model(test_prog, startup_prog)
     test_prog = test_prog.clone(for_test=True)
 
@@ -82,11 +86,17 @@ def infer():
     exe = fluid.Executor(place)
     exe.run(startup_prog)
 
+    if not os.path.exists(cfg.model_path):
+        raise RuntimeError('No pre-trained model found under path {}'.format(
+            cfg.model_path))
+
     # 加载预测模型
     def if_exist(var):
         return os.path.exists(os.path.join(cfg.model_path, var.name))
-    fluid.io.load_vars(exe, cfg.model_path, main_program=test_prog, predicate=if_exist)
-    
+
+    fluid.io.load_vars(
+        exe, cfg.model_path, main_program=test_prog, predicate=if_exist)
+
     #加载预测数据集
     test_dataset = TestDataSet()
     data_num = test_dataset.data_num
@@ -97,9 +107,10 @@ def infer():
         if image is None:
             print(im_name, 'is None')
             continue
-        
+
         # 预测
-        outputs = exe.run(program=test_prog, feed={'image': image}, fetch_list=output)
+        outputs = exe.run(
+            program=test_prog, feed={'image': image}, fetch_list=output)
         instance_map, predictions = cluster.cluster(outputs[0][0], n_sigma=cfg.n_sigma, \
                                     min_pixel=cfg.min_pixel, threshold=cfg.threshold)
 
@@ -109,14 +120,14 @@ def infer():
         output_im = PILImage.fromarray(np.asarray(instance_map, dtype=np.uint8))
         palette = get_palette(len(predictions) + 1)
         output_im.putpalette(palette)
-        result_path = os.path.join(cfg.vis_dir, im_name+'.png')
+        result_path = os.path.join(cfg.vis_dir, im_name + '.png')
         output_im.save(result_path)
 
         if (idx + 1) % 100 == 0:
             print('%d  processd' % (idx + 1))
-            
-    print('%d  processd done' % (idx + 1))   
-    
+
+    print('%d  processd done' % (idx + 1))
+
     return 0