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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 _settings_str(self):
 """Returns a human readable settings representation for logging purposes."""

        settings = "Automatically save changes: {}, " \
            "Show tray icon: {}, " \
            "Allow keyboard navigation: {}, " \
            "Sort by usage count: {}, " \
            "Enable undo using backspace: {}, " \
            "Tray icon theme: {}".format(
               self.autosave_checkbox.isChecked(),
               self.show_tray_checkbox.isChecked(),
               self.allow_kb_nav_checkbox.isChecked(),
               self.sort_by_usage_checkbox.isChecked(),
               self.enable_undo_checkbox.isChecked(),
               self.system_tray_icon_theme_combobox.currentData(Qt.UserRole)
            )
        return settings