wrong IP address range given for ipv4_mapped

[alwhaley]

BPO	43079
Nosy	@180909
PRs	bpo-43079:Fix ipv4_mapped document #30687

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

Show more details

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2021-01-30.22:17:20.351>
labels = ['3.11', 'type-bug', '3.9', '3.10', 'docs']
title = 'wrong IP address range given for ipv4_mapped'
updated_at = <Date 2022-01-22.09:09:29.157>
user = 'https://bugs.python.org/alwhaley'

bugs.python.org fields:

activity = <Date 2022-01-22.09:09:29.157>
actor = 'kumaraditya'
assignee = 'docs@python'
closed = False
closed_date = None
closer = None
components = ['Documentation']
creation = <Date 2021-01-30.22:17:20.351>
creator = 'alwhaley'
dependencies = []
files = []
hgrepos = []
issue_num = 43079
keywords = ['patch']
message_count = 1.0
messages = ['385999']
nosy_count = 3.0
nosy_names = ['docs@python', 'alwhaley', 'wangjiahua']
pr_nums = ['30687']
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue43079'
versions = ['Python 3.9', 'Python 3.10', 'Python 3.11']

Linked PRs

• gh-87245: Improve IPv6Address.ipv4_mapped documentation #92572
• [3.14] gh-87245: Improve IPv6Address.ipv4_mapped documentation (GH-92572) #149360
• [3.13] gh-87245: Improve IPv6Address.ipv4_mapped documentation (GH-92572) #149361

[alwhaley]

https://docs.python.org/3.9/library/ipaddress.html

This documentation for the 'ipaddress' IPv4/IPv6 Manipulation Library incorrectly states the address range for 'ipv4_mapped' as ::FFFF/96 (which means 0:0:0:0:0:0:0:FFFF/96). This is just flat out wrong. There are some websites out there, e.g. APNIC, that also have this error.

The correct address range can be expressed by any of the following methods:

1. 0:0:0:0:0:FFFF:0:0/96
2. ::FFFF:0:0/96
3. 0:0:0:0:0:FFFF::/96