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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_windows_if_list(extended=False):
 """Returns windows interfaces through GetAdaptersAddresses. params: - extended: include anycast and multicast IPv6 (default False)"""

    # Should work on Windows XP+
    def _get_mac(x):
        size = x["physical_address_length"]
        if size != 6:
            return ""
        data = bytearray(x["physical_address"])
        return str2mac(bytes(data)[:size])

    def _get_ips(x):
        unicast = x['first_unicast_address']
        anycast = x['first_anycast_address']
        multicast = x['first_multicast_address']

        def _resolve_ips(y):
            if not isinstance(y, list):
                return []
            ips = []
            for ip in y:
                addr = ip['address']['address'].contents
                if addr.si_family == socket.AF_INET6:
                    ip_key = "Ipv6"
                    si_key = "sin6_addr"
                else:
                    ip_key = "Ipv4"
                    si_key = "sin_addr"
                data = getattr(addr, ip_key)
                data = getattr(data, si_key)
                data = bytes(bytearray(data.byte))
                # Build IP
                if data:
                    ips.append(inet_ntop(addr.si_family, data))
            return ips

        ips = []
        ips.extend(_resolve_ips(unicast))
        if extended:
            ips.extend(_resolve_ips(anycast))
            ips.extend(_resolve_ips(multicast))
        return ips

    if six.PY2:
        _str_decode = lambda x: x.encode('utf8', errors='ignore')
    else:
        _str_decode = plain_str
    return [
        {
            "name": _str_decode(x["friendly_name"]),
            "win_index": x["interface_index"],
            "description": _str_decode(x["description"]),
            "guid": _str_decode(x["adapter_name"]),
            "mac": _get_mac(x),
            "ipv4_metric": 0 if WINDOWS_XP else x["ipv4_metric"],
            "ipv6_metric": 0 if WINDOWS_XP else x["ipv6_metric"],
            "ips": _get_ips(x)
        } for x in GetAdaptersAddresses()
    ]