diff --git a/NetworkAnalog/SimObjs.py b/NetworkAnalog/SimObjs.py
index 07c77b1..6c27b31 100644
--- a/NetworkAnalog/SimObjs.py
+++ b/NetworkAnalog/SimObjs.py
@@ -754,3 +754,7 @@ class SimHub(SimBase):
         print(f"集线器-{self.ObjLabel}接受到数据，将进行转发！")
         self.transmit(packet)
 
+
+if __name__ == '__main__':
+    pass
+