code: def histogram_stretch(self, use_bands, **kwargs):
          ''' entry point for contrast stretching '''
          data = self._read(self[use_bands,...], **kwargs)
          data = np.rollaxis(data.astype(np.float32), 0, 3)
          return self._histogram_stretch(data, **kwargsf histogram_stretch(self, use_bands, **kwargs):
          ''' entry point for contrast stretching '''
          data = self._read(self[use_bands,...], **kwargs)
          data = np.rollaxis(data.astype(np.float32), 0, 3)
          return self._histogram_stretch(data, **kwargs)
docs: entry point for contrast stretching