diff --git a/MultiChannelVideoInfer/main_infer.py b/MultiChannelVideoInfer/main_infer.py
index 81297a7..88228b8 100644
--- a/MultiChannelVideoInfer/main_infer.py
+++ b/MultiChannelVideoInfer/main_infer.py
@@ -22,10 +22,10 @@ import re
 import json
 import os
 import random
-import cv2
 import signal
 import datetime
 import threading
+import cv2
 import numpy as np
 import MxpiDataType_pb2 as MxpiDataType
 from StreamManagerApi import StreamManagerApi, MxDataInput, StringVector
@@ -65,7 +65,7 @@ if __name__ == '__main__':
         time_count = 0
         begin_time = datetime.datetime.now()
         one_step = 2
-        
+
         while True:
             cur_time = (datetime.datetime.now() - begin_time).total_seconds()
             if cur_time >= (time_step + one_step):