Can't reassign class despite the assigned class having identical slots

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#79,229 opened on Oct 23, 2018 4 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 4/5
Estimated time: 3-5 days
Newbie friendliness: 35/100

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

Research direction

The issue names no implementation files or tests. Start by reproducing the reported class reassignment failure with classes having identical slots, then trace the relevant CPython behavior and existing regression tests. Done means the intended reassignment works for compatible classes and the behavior is covered by a focused test.

Written by the indexing model from the issue text.

Description

3.7 (EOL) interpreter-core

BPO	35048
Nosy	@rhettinger, @mdickinson, @pitrou, @benjaminp, @serhiy-storchaka, @srinivasreddy, @mr-nfamous, @tirkarthi

^{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 2018-10-23.10:07:18.332>
labels = ['3.7']
title = "Can't reassign __class__ despite the assigned class having identical slots"
updated_at = <Date 2019-12-07.18:56:57.071>
user = 'https://github.com/mr-nfamous'

bugs.python.org fields:

activity = <Date 2019-12-07.18:56:57.071>
actor = 'rhettinger'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = []
creation = <Date 2018-10-23.10:07:18.332>
creator = 'bup'
dependencies = []
files = []
hgrepos = []
issue_num = 35048
keywords = []
message_count = 2.0
messages = ['328296', '357983']
nosy_count = 9.0
nosy_names = ['rhettinger', 'mark.dickinson', 'pitrou', 'benjamin.peterson', 'serhiy.storchaka', 'thatiparthy', 'bup', 'xtreak', 'Sterling Smith']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = None
url = 'https://bugs.python.org/issue35048'
versions = ['Python 3.7']

Dominant language: Python
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Merged PRs (30d): 558

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Can't reassign __class__ despite the assigned class having identical slots