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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _hex_to_rgb(color):
 """\ Helper function to convert a color provided in hexadecimal format as RGB triple. """

    if color[0] == '#':
        color = color[1:]
    if len(color) == 3:
        color = color[0] * 2 + color[1] * 2 + color[2] * 2
    if len(color) != 6:
        raise ValueError('Input #{0} is not in #RRGGBB format'.format(color))
    return [int(n, 16) for n in (color[:2], color[2:4], color[4:])]