ipaddress: Add optional prefixlen argument to ip_interface and ip_network

[GaryvanderMerwe]

BPO	22962
Nosy	@ncoghlan, @Kentzo

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2017-03-26.10:30:02.877>
created_at = <Date 2014-11-28.08:54:06.478>
labels = ['type-feature', 'library']
title = 'ipaddress: Add optional prefixlen argument to ip_interface and ip_network'
updated_at = <Date 2017-03-26.10:30:02.876>
user = 'https://bugs.python.org/GaryvanderMerwe'

bugs.python.org fields:

activity = <Date 2017-03-26.10:30:02.876>
actor = 'Gary.van.der.Merwe'
assignee = 'none'
closed = True
closed_date = <Date 2017-03-26.10:30:02.877>
closer = 'Gary.van.der.Merwe'
components = ['Library (Lib)']
creation = <Date 2014-11-28.08:54:06.478>
creator = 'Gary.van.der.Merwe'
dependencies = []
files = []
hgrepos = []
issue_num = 22962
keywords = []
message_count = 3.0
messages = ['231800', '290061', '290522']
nosy_count = 4.0
nosy_names = ['ncoghlan', 'pmoody', 'Gary.van.der.Merwe', 'Ilya.Kulakov']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue22962'
versions = ['Python 3.5']

[GaryvanderMerwe]

Currently if one has an ip address in int or IPv4Address/IPv6Address form, it is not possilbe to create a ip_interface or ip_network from that with specific prefix length, without first converting the address into string form, and then appending the prefixlen

Please could an optional prefixlen argument to ip_interface and ip_network (and the __init__ functions for their backing classes) so that one can do this.

e.g: it should work like this:

>>> ipaddress.ip_interface(167772161, prefixlen=24)
IPv4Interface('10.0.0.1/24')

I would like to do a patch for this. I would just first like some feedback as to whether a patch for this would accepted.

[Kentzo]

You can initialize ip_interface via a tuple of 2 elements: IP address and a prefix (prefixlen or string representation of a netmask).

I believe the issue can be closed now.

[GaryvanderMerwe]

Indeed. Thanks to whoever fixed this.