A micropython dice roller, output in binary!

roll.py

import pyb

def set_state():
    n = int(pyb.rng() / 2**30 * 6) + 1
    [pyb.LED(l).off() for l in range(1,4)]
    byte_list = list(str(bin(n))[2:])
    byte_list.reverse()
    for led, byte in enumerate(byte_list):
        if int(byte):
            pyb.LED(int(led) + 1).on()
        else:
            pyb.LED(int(led) + 1).off()

sw = pyb.Switch()

while True:
    while not sw():
        pass
    pyb.delay(300)
    set_state()