How to add a QAction to the very end of the toolbar (PyQt5)?

Question

Python

I created a toolbar where I add objects of the QAction class. However, the addition occurs at the very beginning, that is, to the left side. And I would like the last object, on the contrary, to be pressed to the right side.

self.file_action = QAction(QIcon('files.png'),
                                 'Change files (Ctrl + F)')
        self.file_action.setShortcut('Ctrl+F')
        self.settings_action = QAction(QIcon('settings.png'),
                                       'Settings menu (Ctrl + S)')
        self.settings_action.setShortcut('Ctrl + S')
        self.volume_action = QAction(QIcon('volume.png'),
                                     'Open settings window (Ctrl + V)')
        self.volume_action.setShortcut('Ctrl + V')
        self.file_action.triggered.connect(self.ask_file_names)
        self.toolbar = self.root_window.addToolBar('Show menu')
        self.toolbar.setStyleSheet('background-color: %s'
                                   % self.gray_blue)
        self.toolbar.setMovable(False)
        self.toolbar.addAction(self.file_action)
        self.toolbar.addAction(self.settings_action)
        self.toolbar.addActions([self.volume_action])