isinstance is calling ob.getattribute as a fallback instead of object.class.get

Open

#76,864 opened on Jan 26, 2018 16 comments 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

Assessment

Difficulty: 4/5
Estimated time: 3-5 days
Newbie friendliness: 25/100

Issue type: Bug
Clarity: Needs clarification
Activity status: Stale
Tech stack: python
Domain: compilers

Research direction

No source files, tests, or entry points are named in the issue. Start by reproducing the isinstance behavior described in the title and tracing the interpreter-core and library implementation; done means the fallback behavior is corrected and covered by a regression test.

Written by the indexing model from the issue text.

Description

3.7 (EOL) interpreter-core stdlib

BPO	32683
Nosy	@rhettinger, @pfmoore, @stevendaprano, @bitdancer, @ethanfurman, @mr-nfamous, @P403n1x87

^{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 2018-01-26.21:10:40.522>
labels = ['interpreter-core', '3.7', 'library']
title = 'isinstance is calling ob.__getattribute__ as a fallback instead of object.__class__.__get__'
updated_at = <Date 2021-12-10.11:41:23.463>
user = 'https://github.com/mr-nfamous'

bugs.python.org fields:

activity = <Date 2021-12-10.11:41:23.463>
actor = 'steven.daprano'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Interpreter Core', 'Library (Lib)']
creation = <Date 2018-01-26.21:10:40.522>
creator = 'bup'
dependencies = []
files = []
hgrepos = []
issue_num = 32683
keywords = []
message_count = 16.0
messages = ['310793', '310814', '310823', '408122', '408128', '408131', '408133', '408135', '408136', '408141', '408165', '408170', '408171', '408172', '408188', '408192']
nosy_count = 7.0
nosy_names = ['rhettinger', 'paul.moore', 'steven.daprano', 'r.david.murray', 'ethan.furman', 'bup', 'Gabriele Tornetta']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = None
url = 'https://bugs.python.org/issue32683'
versions = ['Python 3.7']

Dominant language: Python
Stars: 77.2k
Forks: 36k
Avg merge: 1d 9h
Merged PRs (30d): 558

Contributor guide

Open the contributing guide

First steps

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

Similar issues

[Bug]: notebooks/06_visualization_quickstart.ipynb fails: SHAPVisualizer.plot_waterfall raises IndexError Open

Difficulty 2/5 1-3 hours Newbie friendliness 74/100

bancolombia/sentinel#23 · Opened Sep 20, 2026
test md Open

CI

Difficulty 2/5 1-3 hours Newbie friendliness 74/100

sympy/sympy#30547 · 1 comment · Opened Sep 20, 2026
quickjs: support `timeout=None` (no per-call deadline) in `CodeInterpreterMiddleware` Open

integration:quickjs org:external priority:backlog topic:code-interpreter topic:middleware type:feature

Difficulty 2/5 1-3 hours Newbie friendliness 74/100

langchain-ai/deepagents#6450 · Opened Sep 20, 2026
OpenAISamplingHandler drops ToolResultContent when a user message's list content also carries text/image blocks Open

bug client

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

PrefectHQ/fastmcp#5182 · 1 comment · Opened Sep 20, 2026
last-mile drop-off on this SKILL.md Open

Difficulty 2/5 1-3 hours Newbie friendliness 74/100

wshobson/agents#717 · Opened Sep 20, 2026

More Python issues

isinstance is calling ob.__getattribute__ as a fallback instead of object.__class__.__get__