Fix the AttributeError message for deletion of a missing attribute #88023

assignee = None
closed_at = None
created_at = <Date 2021-04-15.16:31:31.975>
labels = ['interpreter-core', 'type-feature', '3.8', '3.9', '3.10']
title = 'Fix the AttributeError message for deletion of a missing attribute'
updated_at = <Date 2021-04-18.05:53:26.612>
user = 'https://github.com/maggyero'

activity = <Date 2021-04-18.05:53:26.612>
actor = 'rhettinger'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Interpreter Core']
creation = <Date 2021-04-15.16:31:31.975>
creator = 'maggyero'
dependencies = []
files = []
hgrepos = []
issue_num = 43857
keywords = ['patch']
message_count = 1.0
messages = ['391140']
nosy_count = 3.0
nosy_names = ['rhettinger', 'pablogsal', 'maggyero']
pr_nums = ['25424']
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue43857'
versions = ['Python 3.8', 'Python 3.9', 'Python 3.10']