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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 create_settings(self):
 """Create the widget, organized in two parts. Notes ----- When you add widgets in config, remember to update show_settings too """

        bbox = QDialogButtonBox(QDialogButtonBox.Ok | QDialogButtonBox.Apply |
                                QDialogButtonBox.Cancel)
        self.idx_ok = bbox.button(QDialogButtonBox.Ok)
        self.idx_apply = bbox.button(QDialogButtonBox.Apply)
        self.idx_cancel = bbox.button(QDialogButtonBox.Cancel)
        bbox.clicked.connect(self.button_clicked)

        page_list = QListWidget()
        page_list.setSpacing(1)
        page_list.currentRowChanged.connect(self.change_widget)

        pages = ['General', 'Overview', 'Signals', 'Channels', 'Spectrum',
                 'Notes', 'Video']
        for one_page in pages:
            page_list.addItem(one_page)

        self.stacked = QStackedWidget()
        self.stacked.addWidget(self.config)
        self.stacked.addWidget(self.parent.overview.config)
        self.stacked.addWidget(self.parent.traces.config)
        self.stacked.addWidget(self.parent.channels.config)
        self.stacked.addWidget(self.parent.spectrum.config)
        self.stacked.addWidget(self.parent.notes.config)
        self.stacked.addWidget(self.parent.video.config)

        hsplitter = QSplitter()
        hsplitter.addWidget(page_list)
        hsplitter.addWidget(self.stacked)

        btnlayout = QHBoxLayout()
        btnlayout.addStretch(1)
        btnlayout.addWidget(bbox)

        vlayout = QVBoxLayout()
        vlayout.addWidget(hsplitter)
        vlayout.addLayout(btnlayout)

        self.setLayout(vlayout)