python / python/cpython

ip_interface addition and subtraction changes netmask

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stdlib type-bug
Dominant language
Python
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Description

BPO 42477

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 = None
created_at = <Date 2020-11-26.23:14:01.991>
labels = ['type-bug', 'library', '3.10']
title = 'ip_interface addition and subtraction changes netmask'
updated_at = <Date 2020-11-28.20:04:31.585>
user = 'https://bugs.python.org/wykoterhaar'

bugs.python.org fields:

activity = <Date 2020-11-28.20:04:31.585>
actor = 'epaine'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2020-11-26.23:14:01.991>
creator = 'wyko.ter.haar'
dependencies = []
files = []
hgrepos = []
issue_num = 42477
keywords = []
message_count = 1.0
messages = ['381918']
nosy_count = 2.0
nosy_names = ['pmoody', 'wyko.ter.haar']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue42477'
versions = ['Python 3.10']

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the reported behavior at the ip_interface addition and subtraction entry points, then inspect the standard-library implementation involved. Determine the expected netmask behavior and add a regression test; done means the netmask remains correct for both operations.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
networking
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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