import subprocess


def uuid_str_to_int(uuid_str: str) -> int:
    """
    >>> uuid_str_to_int('613ea4ac-a4cf-4026-8e99-1904b2bb5cd0')
    129260377989791042510121038559452028112
    >>> uuid_str_to_int('c064bf40-4fd1-50e1-a2f7-2aefa4593f67')
    255734883912096391966117250963728842599
    """
    return int(uuid_str.replace("-", ""), 16)


def uuid_int_to_str(uuid_int: str) -> str:
    """
    >>> uuid_int_to_str(129260377989791042510121038559452028112)
    '613ea4ac-a4cf-4026-8e99-1904b2bb5cd0'
    >>> uuid_int_to_str(255734883912096391966117250963728842599)
    'c064bf40-4fd1-50e1-a2f7-2aefa4593f67'
    """
    uuid_hex = hex(uuid_int)[2:]
    return "-".join(
        (uuid_hex[0:8], uuid_hex[8:12], uuid_hex[12:16], uuid_hex[16:20], uuid_hex[20:])
    )


def uuid_int_to_bytes(uuid_siv: int) -> bytes:
    """
    >>> uuid_int_to_bytes(129260377989791042510121038559452028112)
    b'a>\\xa4\\xac\\xa4\\xcf@&\\x8e\\x99\\x19\\x04\\xb2\\xbb\\\\\\xd0'
    >>> uuid_int_to_bytes(255734883912096391966117250963728842599)
    b'\\xc0d\\xbf@O\\xd1P\\xe1\\xa2\\xf7*\\xef\\xa4Y?g'
    """
    return uuid_siv.to_bytes(16, byteorder="big")


def uuid_bytes_to_int(uuid_bytes: bytes) -> int:
    """
    >>> uuid_bytes_to_int(b'a>\\xa4\\xac\\xa4\\xcf@&\\x8e\\x99\\x19\\x04\\xb2\\xbb\\\\\\xd0')
    129260377989791042510121038559452028112
    >>> uuid_bytes_to_int(b'\\xc0d\\xbf@O\\xd1P\\xe1\\xa2\\xf7*\\xef\\xa4Y?g')
    255734883912096391966117250963728842599
    """
    return int.from_bytes(uuid_bytes, byteorder="big", signed=False)


def uuid_str_to_bytes(uuid_str: str) -> bytes:
    """
    >>> uuid_str_to_bytes('613ea4ac-a4cf-4026-8e99-1904b2bb5cd0')
    b'a>\\xa4\\xac\\xa4\\xcf@&\\x8e\\x99\\x19\\x04\\xb2\\xbb\\\\\\xd0'
    >>> uuid_str_to_bytes('c064bf40-4fd1-50e1-a2f7-2aefa4593f67')
    b'\\xc0d\\xbf@O\\xd1P\\xe1\\xa2\\xf7*\\xef\\xa4Y?g'
    """
    return uuid_int_to_bytes(uuid_str_to_int(uuid_str))


def uuid_bytes_to_str(uuid_bytes: bytes) -> str:
    """
    >>> uuid_bytes_to_str(b'a>\\xa4\\xac\\xa4\\xcf@&\\x8e\\x99\\x19\\x04\\xb2\\xbb\\\\\\xd0')
    '613ea4ac-a4cf-4026-8e99-1904b2bb5cd0'
    >>> uuid_bytes_to_str(b'\\xc0d\\xbf@O\\xd1P\\xe1\\xa2\\xf7*\\xef\\xa4Y?g')
    'c064bf40-4fd1-50e1-a2f7-2aefa4593f67'
    """
    return uuid_int_to_str(uuid_bytes_to_int(uuid_bytes))


def generate_uuid4_bytes() -> bytes:
    return subprocess.check_output(["uuid", "-v", "4", "-F", "BIN"]).strip()