On Tue, 15 Sep 2009 at 18:43, Antoine Pitrou wrote:
> R. David Murray <rdmurray <at> bitdance.com> writes:
>>
>> x = IPv4AddressWithMask('192.168.1.1/24')
>> x.network == IPv4Network('192.168.1.0/24')
>> x.network[1] == x
>
> I don't think we need an IPAddressWithMask which would just complicate the API
> without any obvious benefit.
> We just need a factory function which returns a tuple after parsing:
>
> >>> addr, net = parse_address_with_mask('192.168.1.1/24')
> >>> addr == IPv4Address('192.168.1.1')
> True
> >>> net == IPv4Network('192.168.1.0/24')
> True
I would find that acceptable but sub-optimal. Most of my use cases
(which involve manipulating router and firewall configuration files) would
then start by making a little class named AddressWithNetwork to hold the
tuple returned by your parse function, with attributes 'ip' and 'network'
and a representation that included the netmask.
Other people's use cases would look like addr, _ = parse_address...
An IPv4Address with 'network' and 'mask' attributes that could be
None would also not complicate the API, IMO, and would handle both
of these use cases.
--David
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