How to use the ciscoconfparse.local_py.ipaddr.IPv4Network function in ciscoconfparse

    @property
    def is_reserved(self):
       """Test if the address is otherwise IETF reserved.

        Returns:
            A boolean, True if the address is within the
            reserved IPv4 Network range.

       """
       return self in IPv4Network('240.0.0.0/4')

    @property
    def is_unspecified(self):
        """Test if the address is unspecified.

        Returns:
            A boolean, True if this is the unspecified address as defined in
            RFC 5735 3.

        """
        return self in IPv4Network('0.0.0.0')

raise ValueError('unknown IP version')

    ip_bits = first._max_prefixlen
    first_int = first._ip
    last_int = last._ip
    while first_int <= last_int:
        nbits = _count_righthand_zero_bits(first_int, ip_bits)
        current = None
        while nbits >= 0:
            addend = 2**nbits - 1
            current = first_int + addend
            nbits -= 1
            if current <= last_int:
                break
        prefix = _get_prefix_length(first_int, current, ip_bits)
        net = ip('%s/%d' % (str(first), prefix))
        networks.append(net)
        if current == ip._ALL_ONES:
            break
        first_int = current + 1
        first = IPAddress(first_int, version=first._version)
    return networks

determine what the IP address type is. important for things
          like IPNetwork(1), which could be IPv4, '0.0.0.1/32', or IPv6,
          '::1/128'.

    Returns:
        An IPv4Network or IPv6Network object.

    Raises:
        ValueError: if the string passed isn't either a v4 or a v6
          address. Or if a strict network was requested and a strict
          network wasn't given.

    """
    if version:
        if version == 4:
            return IPv4Network(address, strict)
        elif version == 6:
            return IPv6Network(address, strict)

    try:
        return IPv4Network(address, strict)
    except (AddressValueError, NetmaskValueError):
        pass

    try:
        return IPv6Network(address, strict)
    except (AddressValueError, NetmaskValueError):
        pass

    raise ValueError('%r does not appear to be an IPv4 or IPv6 network' %
                     address)

    @property
    def is_multicast(self):
        """Test if the address is reserved for multicast use.

        Returns:
            A boolean, True if the address is multicast.
            See RFC 3171 for details.

        """
        return self in IPv4Network('224.0.0.0/4')

If the last object is not greater than the first.
            If the version is not 4 or 6.

    """
    if not (isinstance(first, _BaseIP) and isinstance(last, _BaseIP)):
        raise TypeError('first and last must be IP addresses, not networks')
    if first.version != last.version:
        raise TypeError("%s and %s are not of the same version" % (
                str(first), str(last)))
    if first > last:
        raise ValueError('last IP address must be greater than first')

    networks = []

    if first.version == 4:
        ip = IPv4Network
    elif first.version == 6:
        ip = IPv6Network
    else:
        raise ValueError('unknown IP version')

    ip_bits = first._max_prefixlen
    first_int = first._ip
    last_int = last._ip
    while first_int <= last_int:
        nbits = _count_righthand_zero_bits(first_int, ip_bits)
        current = None
        while nbits >= 0:
            addend = 2**nbits - 1
            current = first_int + addend
            nbits -= 1
            if current <= last_int:

    @property
    def is_private(self):
        """Test if this address is allocated for private networks.

        Returns:
            A boolean, True if the address is reserved per RFC 1918.

        """
        return (self in IPv4Network('10.0.0.0/8') or
                self in IPv4Network('172.16.0.0/12') or
                self in IPv4Network('192.168.0.0/16'))

    @property
    def is_private(self):
        """Test if this address is allocated for private networks.

        Returns:
            A boolean, True if the address is reserved per RFC 1918.

        """
        return (self in IPv4Network('10.0.0.0/8') or
                self in IPv4Network('172.16.0.0/12') or
                self in IPv4Network('192.168.0.0/16'))

    @property
    def is_loopback(self):
        """Test if the address is a loopback address.

        Returns:
            A boolean, True if the address is a loopback per RFC 3330.

        """
        return self in IPv4Network('127.0.0.0/8')