set_bits and pack as integer

def set_bits(*bits, invert=False):
    """
    Set bits 0 - 7

    >>> value = set_bits(0,1,4, invert=True)
    >>> print(f"{value:08b}")
    11101100
    """
    retval = 0
    for bit in bits:
        retval |= 0x1 << bit
    if invert:
        retval = ~retval
        retval &= 0xFF
    return retval