删除实时监控导致的bug

Front/main.py

             self.refresh_tree()
         except Exception as e:
             QMessageBox.critical(self, '错误', f'删除数据时出错: {str(e)}')
+
     def export_item(self):
         # 获取当前选中的项目
         selected_items = widgets.allTreeWidget.selectedItems()
             widgets.qureyTreeWidget.insertTopLevelItems(0, treeWidgetItems)
 
 
-class DatabaseChangeHandler(FileSystemEventHandler):
-    def __init__(self, main_window):
-        self.main_window = main_window
-
-    def on_modified(self, event):
-        if event.src_path.endswith('.db'):
-            self.main_window.refresh_tree()
+# class DatabaseChangeHandler(FileSystemEventHandler):
+#     def __init__(self, main_window):
+#         self.main_window = main_window
+#
+#     def on_modified(self, event):
+#         # 忽略 .db-journal 文件的变化
+#         if event.src_path.endswith('.db-journal'):
+#             return
+#         if event.src_path.endswith('.db'):
+#             self.main_window.refresh_tree()
 
 
 class MainWindow(QMainWindow):
         self.ui.createFile.clicked.connect(self.on_create_file_clicked)
         self.ui.export_2.clicked.connect(self.on_export_2_clicked)
         # 初始化数据库监控
-        self.observer = Observer()
-        self.observer.schedule(DatabaseChangeHandler(self), path=os.path.abspath('../SQL'), recursive=False)
-        self.observer.start()
+        # self.observer = Observer()
+        # self.observer.schedule(DatabaseChangeHandler(self), path=os.path.abspath('../SQL'), recursive=False)
+        # self.observer.start()
         # self.comboBox_2 = QComboBox(self)
         # ...此处为省略代码...
         global widgets
         # tree_button.itemClicked.connect(self.itembuttonClick)
         # tree_button.itemDoubleClicked.connect(self.itembuttonClick)
 
-
-    #单元格的右键
+    # 单元格的右键
     def show_custom_context_menu(self, pos):
         # 创建一个右键菜单
         menu = QMenu(self.ui.resultTableView1)
         menu.addAction(action_3)
         menu.exec(self.ui.resultTableView1.mapToGlobal(pos))
 
-    def closeEvent(self, event):
-        # 停止监控
-        self.observer.stop()
-        self.observer.join()
-        event.accept()
+    # def closeEvent(self, event):
+    #     # 停止监控
+    #     self.observer.stop()
+    #     self.observer.join()
+    #     event.accept()
 
     # 绑定组件
     def bind(self):
         # 隐藏默认label
         self.ui.defaultLabel.setVisible(False)
 
-
-
     # 全树的item展示
     def itembuttonClick(self):
         # 判定是否获取的是根节点
             # 关联自定义的右键菜单方法到customContextMenuRequested信号
             self.ui.resultTableView1.customContextMenuRequested.connect(self.show_custom_context_menu)
 
-    #右键对应行可删除对应行（只是视图上）
+    # 右键对应行可删除对应行（只是视图上）
     def seleceModel_itemclicked(self):
         curIndex = self.selectModel.currentIndex()
         self.ui.resultTableView1.model().removeRow(curIndex.row())