def __init__(self, *args, **kwargs):
        super(QStackItem, self).__init__(*args, **kwargs)
        self._stack_widget = None
        self.setLayout(QSingleWidgetLayout())
Gets the extension (or compound extension) from a filename
dataset/ETHPy150Open ContinuumIO/ashiba/enaml/enaml/qt/qt_stack_item.py/QStackItem.__init__--crossover with--dataset/ETHPy150Open gosquadron/squadron/squadron/template.py/get_file_ext