code: def test_blend_palette(self):
      colors = ["red", "yellow", "white"]
      pal_cmap = palettes.blend_palette(colors, as_cmap=True)
      assert isinstance(pal_cmap, mpl.colors.LinearSegmentedColormap)
  
      colors = ["red", "blue"]
      pal = palettes.blend_palette(colors)
      pal_str = "blend:" + ",".join(colors)
      pal_from_str = palettes.color_palette(pal_str)
      assert pal == pal_from_str
  
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 26 for calling the TestColorPalettes obj's underlying member method code with example usage: obj.test_blend_palette() without return types