[Python-Dev] PEP 3144 review. (original) (raw)

Greg Ewing greg.ewing at canterbury.ac.nz
Thu Sep 17 04:30:28 CEST 2009

Andrew McNamara wrote:

I also suggest the AddressWithMask classes not have any network/container behaviours for a similar reason. If the developer needs these, the .network attribute is only a lookup away.

Another way to approach this would be for the Address object to potentially have a 'network' attribute referencing a Network object.

Then there are only two classes, but three use cases are covered:

  1. a Network

  2. a plain, network-agnostic Address with network == None

  3. an Address with an attached Network

An Address could be constructed in three ways:

Address(ip_number)

Address(ip_number, network = )

Address(ip_number, mask = ) # constructs and attaches a suitably-masked Network instance

We could also have some_network[n] return an Address referring back to the network object it was obtained from.

-- Greg

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