Assigning function parameter to class attribute by the same name

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2021-03-03.00:36:29.041>
labels = ['interpreter-core', 'type-bug', '3.9', '3.10']
title = 'Assigning function parameter to class attribute by the same name'
updated_at = <Date 2021-03-03.09:19:41.364>
user = 'https://github.com/jennydaman'

bugs.python.org fields:

activity = <Date 2021-03-03.09:19:41.364>
actor = 'steven.daprano'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Interpreter Core']
creation = <Date 2021-03-03.00:36:29.041>
creator = 'jennydaman'
dependencies = []
files = []
hgrepos = []
issue_num = 43380
keywords = []
message_count = 6.0
messages = ['387987', '387990', '387991', '387992', '388005', '388008']
nosy_count = 3.0
nosy_names = ['eric.smith', 'steven.daprano', 'jennydaman']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue43380'
versions = ['Python 3.9', 'Python 3.10']