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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 update_band_description(self):
 """Helper to update band description."""

        self.clear_further_steps()
        # Set widgets
        selected_band = self.selected_band()
        statistics = self.parent.layer.dataProvider().bandStatistics(
            selected_band,
            QgsRasterBandStats.All,
            self.parent.layer.extent(),
            0)
        band_description = tr(
            'This band contains data from {min_value} to {max_value}').format(
            min_value=statistics.minimumValue,
            max_value=statistics.maximumValue
        )
        self.lblDescribeBandSelector.setText(band_description)