old_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  
  """Functions for converting and comparing colors."""
  
  import colorsys
  import math
  import operator
  
  
  def hls_to_rgb(hue, lightness, saturation):
      """Convert HLS (hue, lightness, saturation) values to RGB."""
      return tuple(int(math.ceil(c * 255.))
                   for c in colorsys.hls_to_rgb(hue, lightness, saturation))
  
  
  def hsv_to_rgb(hue, saturation, value):
      """Convert HSV (hue, saturation, value) values to RGB."""
      return tuple(int(c * 255.)
                   for c in colorsys.hsv_to_rgb(hue/360.,
                                                saturation/100.,
                                                value/100.))
  
  
  def color_difference(rgb1, rgb2):
      """Return the sums of component differences between two colors."""
      return sum(abs(i - j) for i, j in zip(rgb1, rgb2))
  
  
  def color_distance(rgb1, rgb2):
      """Compute the Euclidian distance between two colors."""
      r1, g1, b1 = rgb1
      r2, g2, b2 = rgb2
  
      return math.sqrt((r2 - r1)**2 + (g2 - g1)**2 + (b2 - b1)**2)
  
  
  def closest_color(rgb, clut):
      """Return the CLUT index of the closest RGB color to a given RGB tuple."""
      # Generate a list of tuples of CLUT indices and the color difference value
      indexed_diffs = ((idx, color_difference(rgb, clut[idx])) for idx in clut)
  
      return min(indexed_diffs, key=operator.itemgetter(1))[0]
  
new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  
  """Functions for converting and comparing colors."""
  
  import colorsys
  import math
  import operator
  
  
  def hls_to_rgb(hue, lightness, saturation):
      """Convert HLS (hue, lightness, saturation) values to RGB."""
      return tuple(int(math.ceil(c * 255.))
                   for c in colorsys.hls_to_rgb(hue, lightness, saturation))
  
  
  def hsv_to_rgb(hue, saturation, value):
      """Convert HSV (hue, saturation, value) values to RGB."""
      return tuple(int(c * 255.)
                   for c in colorsys.hsv_to_rgb(hue/360.,
                                                saturation/100.,
                                                value/100.))
  
  
  def color_difference(rgb1, rgb2):
      """Return the sums of component differences between two colors."""
      return sum(abs(i - j) for i, j in zip(rgb1, rgb2))
  
  
  def closest_color(rgb, clut):
      """Return the CLUT index of the closest RGB color to a given RGB tuple."""
      # Generate a list of tuples of CLUT indices and the color difference value
      indexed_diffs = ((idx, color_difference(rgb, clut[idx])) for idx in clut)
  
      return min(indexed_diffs, key=operator.itemgetter(1))[0]
  
subject: Remove unused color distance function