code: def rgb_to_yuv(r, g=None, b=None):
    
    if type(r) in [list,tuple]:
      r, g, b = r
  
    y =  (r * 0.29900) + (g * 0.58700) + (b * 0.11400)
    u = -(r * 0.14713) - (g * 0.28886) + (b * 0.43600)
    v =  (r * 0.61500) - (g * 0.51499) - (b * 0.10001)
    return (y, u, v)
docs: Convert the color from RGB coordinates to YUV.
  
    Parameters:
      :r:
        The Red component value [0...1]
      :g:
        The Green component value [0...1]
      :b:
        The Blue component value [0...1]
  
    Returns:
      The color as an (y, u, v) tuple in the range:
      y[0...1],
      u[-0.436...0.436],
      v[-0.615...0.615]
  
    >>> '(%g, %g, %g)' % rgb_to_yuv(1, 0.5, 0)
    '(0.5925, -0.29156, 0.357505)'