修改类型引用的bug

lib/presenter/presenter.py

@@ -1,6 +1,6 @@
 from concurrent.futures import ThreadPoolExecutor, as_completed
 from threading import Semaphore
-import datetime
+from datetime import datetime
 from typing import Deque
 from lib.alg.image_processing_3d import detect_obstacles_in_box
 import time
@@ -166,7 +166,7 @@ class Presenter:
     # TODO: 对tcp发回的数据进行按行处理，并且返回一个数组(不返回了，它接收数据只是为了切换模式)
     def rec_tcp_data_handle(self, data):
         if data:
-            data += data.decode("utf-8", errors="ignore")
+            data = data.decode("utf-8", errors="ignore")
             while "\n" in data:
                 line, data = data.split("\n", 1)
                 if not line.strip():