code: def test_mpl_reversal(self):
      pal_forward = palettes.mpl_palette("BuPu", 6)
      pal_reverse = palettes.mpl_palette("BuPu_r", 6)
      npt.assert_array_almost_equal(pal_forward, pal_reverse[::-1])
  
imports: import colorsys
  import numpy
  import matplotlib
  import pytest
  import numpy.testing
  from seaborn import palettes, utils, rcmod
  from seaborn.external import husl
  from seaborn._compat import get_colormap
  from seaborn.colors import xkcd_rgb, crayons
label_desc: Use image node_id 19 for calling the TestColorPalettes obj's underlying member method code with example usage: obj.test_mpl_reversal() without return types