argparse.ArgumentParser.add_mutually_exclusive_group : metavar create parenthesis undefined behavior #89743

assignee = None
closed_at = None
created_at = <Date 2021-10-22.19:31:30.976>
labels = ['type-bug', 'library', '3.9', '3.10', '3.11']
title = 'argparse.ArgumentParser.add_mutually_exclusive_group : metavar create parenthesis undefined behavior'
updated_at = <Date 2021-10-25.16:32:34.545>
user = 'https://github.com/AbcSxyZ'

activity = <Date 2021-10-25.16:32:34.545>
actor = 'paul.j3'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2021-10-22.19:31:30.976>
creator = 'AbcSxyZ'
dependencies = []
files = []
hgrepos = []
issue_num = 45580
keywords = []
message_count = 4.0
messages = ['404815', '404891', '404893', '404981']
nosy_count = 5.0
nosy_names = ['paul.j3', 'lys.nikolaou', 'pablogsal', 'sobolevn', 'AbcSxyZ']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue45580'
versions = ['Python 3.9', 'Python 3.10', 'Python 3.11']