get mac and ip from /sys/class/net/... and /proc/net/...

from operator import itemgetter


def get_mac(interface: str) -> str:
    """
    Get MAC Address of network interface.
    """
    try:
        with open(f"/sys/class/net/{interface}/address") as fd:
            return fd.read().strip()
    except FileNotFoundError as err:
        raise ValueError(f"Interface '{interface}' not found.") from None


def get_ips(interface: str) -> list[str]:
    with open("/proc/net/route") as fd:
        lines = fd.readlines()

    select = itemgetter(1, 7)
    to_hex = lambda x: int(x, 16)
    addrs = []
    for line in lines:
        if line.startswith(interface):
            data = line.split()

            if not all(map(to_hex, select(data))):
                continue

            value = int(data[1], 16)
            ip_blocks = [str((value >> shift) & 0xFF) for shift in range(0, 32, 8)]
            addrs.append(".".join(ip_blocks))

    return addrs


def get_ips6(interface: str) -> list[str]:
    with open("/proc/net/if_inet6") as fd:
        lines = fd.readlines()

    addrs = []
    for line in lines:
        ip6, *_, name = line.split()
        if name != interface:
            continue

        ip6 = int(ip6, 16)
        bit_shifter = range(112, -1, -16)
        ip_blocks = [f"{(ip6 >> shift) & 0xFFFF:04x}" for shift in bit_shifter]
        addrs.append(":".join(ip_blocks))

    return addrs


mac, ips4, ips6 = get_mac("wlan0"), get_ips("wlan0"), get_ips6("wlan0")