Python Big Integer to Bytes()

from binascii import unhexlify

def long_to_bytes(value: int, big_endian: bool) -> bytes:
    # https://stackoverflow.com/a/14527004/3810747
    s = unhexlify(('%%0%dx' % (((width := value.bit_length()) + 8 - ((width % 8) or 8)) // 4)) % value)
    return s if big_endian else s[::-1]