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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def keyReleaseEvent(self, event):

 """Reimplement Qt method.
 
 Handle "most recent used" tab behavior,
 When ctrl is released and tab_switcher is visible, tab will be changed.
 """

        if self.isVisible():
            qsc = get_shortcut(context='Editor', name='Go to next file')

            for key in qsc.split('+'):
                key = key.lower()
                if ((key == 'ctrl' and event.key() == Qt.Key_Control) or
                   (key == 'alt' and event.key() == Qt.Key_Alt)):
                        self.item_selected()
        event.accept()