Kleur.py, but its based on kleur.lua

kleur.py

import doctest


def kleur(h: float):
    """
    This is a hue function that converts a float in the range of [0-1] to a string

    Behold! The Doctest!

    >>> kleur(0.598)
    'i\\x00ÿ'
    >>> kleur(0.5985)
    'h\\x00ÿ'
    >>> kleur(0.599)
    'g\\x00ÿ'
    >>> kleur(0.600)
    'f\\x00ÿ'
    >>> kleur(0.60002)
    'e\\x00ÿ'
    >>> kleur(0.298)
    'ÿ6\\x00'
    >>> kleur(0.2985)
    'ÿ5\\x00'
    >>> kleur(0.299)
    'ÿ4\\x00'
    >>> kleur(0.300)
    'ÿ3\\x00'
    >>> kleur(0.30002)
    'ÿ2\\x00'

    '\\x00' is the escaped version of '\x00', which is just hexadecimal for the NULL character (used in most languages as the End Of Line character)

    The opposite of chr() is ord()

    Change the output type as needed - no need to force yourself to convert the string to something else.
    """
    if h < 0 > h:
        # You can also replace this with clamping functionality (if value > 1, value = 0 and if value < 0, value = 0)
        raise ValueError("Input is outside of range: [0-1]")
    r, g, b = 0, 0, 0
    if h < 1 / 3:
        r = 2 - h * 6
        g = h * 6
        b = 0
    elif h < 2 / 3:
        r = 0
        g = 4 - h * 6
        b = h * 6 - 2
    else:
        r = h * 6 - 4
        g = 0
        b = (1 - h) * 6
    if r > 1:
        r = 1
    if g > 1:
        g = 1
    if b > 1:
        b = 1
    r = r * 255
    g = g * 255
    b = b * 255
    return f'{chr(int(g))}{chr(int(r))}{chr(int(b))}'

doctest.testmod()