python / python/cpython

dictobject dictviews don't return NotImplemented for unrecognized types.

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3.7 (EOL) 3.8 (EOL) 3.9 (EOL) interpreter-core type-bug
Dominant language
Python
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Description

BPO 38538
Nosy @methane, @JulienPalard

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 2019-10-20.15:32:28.093>
labels = ['3.8', 'type-bug', '3.7', '3.9']
title = "dictobject dictviews don't return NotImplemented for unrecognized types."
updated_at = <Date 2019-11-22.20:58:55.538>
user = 'https://github.com/JulienPalard'

bugs.python.org fields:

activity = <Date 2019-11-22.20:58:55.538>
actor = 'mdk'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = []
creation = <Date 2019-10-20.15:32:28.093>
creator = 'mdk'
dependencies = []
files = []
hgrepos = []
issue_num = 38538
keywords = []
message_count = 5.0
messages = ['355007', '355032', '355155', '355517', '357322']
nosy_count = 2.0
nosy_names = ['methane', 'mdk']
pr_nums = []
priority = 'normal'
resolution = None
stage = 'test needed'
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue38538'
versions = ['Python 3.7', 'Python 3.8', 'Python 3.9']

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

Read the linked BPO 38538 and locate the dictview comparison behavior in CPython; no file or test is named in the issue. Reproduce the behavior with an unrecognized operand, then add regression coverage and verify that dictviews return NotImplemented as requested.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
backend
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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