python PyQt 组织上下文菜单选项

class Window(QMainWindow):
    # Snip...
    def contextMenuEvent(self, event):
        # Snip...
        menu.addAction(self.saveAction)
        # Creating a separator action
        separator = QAction(self)
        separator.setSeparator(True)
        # Adding the separator to the menu
        menu.addAction(separator)
        menu.addAction(self.copyAction)
        # Snip...