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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 add_label(self):
 """Add label with explanation at top of dialog window."""

        txt = _('Autosave files found. What would you like to do?\n\n'
                'This dialog will be shown again on next startup if any '
                'autosave files are not restored, moved or deleted.')
        label = QLabel(txt, self)
        label.setWordWrap(True)
        self.layout.addWidget(label)