On 20 Mar 2021, at 04:39, Guido van Rossum guido@python.org wrote:
Honestly this is an example of a module that would have been better off outside the stdlib.
On Fri, Mar 19, 2021 at 14:43 Senthil Kumaran senthil@python.org wrote: On Mon, Feb 15, 2021 at 8:36 AM Faisal Mahmood fasial.mahmood94@gmail.com wrote:
Hello,
I hope you are all well, I currently have an issue / merge request that has become stale and as per the guidelines I am sending this e-mail to request someone to review it for me please.
Issue Number: 42861 (https://bugs.python.org/issue42861) Pull Request: 24180 (https://github.com/python/cpython/pull/24180)
Could you share some motivation references that could help explain why this next_network method will be helpful? Is this common enough to warrant a method in the stdlib IP-Address module? If there is prior-art in other external libraries or libraries of other languages, that will be helpful to know and review too.
I had looked at this a month ago when you pinged for review, but I could not immediately determine the benefit of having this method in stdlib, irrespective of implementation correctness or API Signature. I also lack extensive experience with ipv6.
Thanks, Senthil
I don’t know if this is gonna support Faisal’s cause (“It’s used in a third party library in the wild, that means stdlib could use it!”) or the exact opposite (“it’s provided by a third party library, so may as well use third party library and stdlib doesn’t necessarily need this”) but the quite popular netaddr library that I’m a maintainer of does have IPNetwork.next() and IPNetwork.previous() methods[1][2]. The main difference is that in netaddr:
* next() and previous() can produce networks arbitrary number of steps away, not just the first closest network forwards or backwards * going from a network to its supernetwork or subnetwork is done through a separate set of supernet() and subnet() methods[3][4]
I can’t say how many library users actually consume this particular section of the API, of course, but I expect this API to be used and it seems rather useful.
Best, Jakub
[1] https://netaddr.readthedocs.io/en/latest/api.html#netaddr.IPNetwork.next [2] https://netaddr.readthedocs.io/en/latest/api.html#netaddr.IPNetwork.previous [3] https://netaddr.readthedocs.io/en/latest/api.html#netaddr.IPNetwork.subnet [4] https://netaddr.readthedocs.io/en/latest/api.html#netaddr.IPNetwork.supernet