argparse: terminal width is not detected properly

[zbysz]

BPO	13042
Superseder	bpo-13041: argparse: terminal width is not detected properly
Files	patch1.diff

^{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 = <Date 2011-09-24.22:12:15.135>
created_at = <Date 2011-09-24.22:07:20.177>
labels = ['type-bug', 'library']
title = 'argparse: terminal width is not detected properly'
updated_at = <Date 2011-09-24.22:48:08.875>
user = 'https://bugs.python.org/zbysz'

bugs.python.org fields:

activity = <Date 2011-09-24.22:48:08.875>
actor = 'zbysz'
assignee = 'none'
closed = True
closed_date = <Date 2011-09-24.22:12:15.135>
closer = 'ezio.melotti'
components = ['Library (Lib)']
creation = <Date 2011-09-24.22:07:20.177>
creator = 'zbysz'
dependencies = []
files = ['23239']
hgrepos = []
issue_num = 13042
keywords = ['patch']
message_count = 2.0
messages = ['144508', '144511']
nosy_count = 1.0
nosy_names = ['zbysz']
pr_nums = []
priority = 'normal'
resolution = 'duplicate'
stage = 'resolved'
status = 'closed'
superseder = '13041'
type = 'behavior'
url = 'https://bugs.python.org/issue13042'
versions = ['Python 3.3', 'Python 3.4']

[zbysz]

COLUMNS is a shell variable (updated whenever the window size
changes), that usually isn't exported to programs. Therefore checking
for COLUMNS in sys.environ will not work in the majority of cases. The
proper check is to use the TIOCGWINSZ ioctl on stdout.

Why COLUMNS is not exported? Because it can change during the lifetime
of a program. Therefore it is better to use the dynamic ioctl.

[zbysz]

Hm, I have somehow submitted the same tex ttwwiiccee. Sorry about that.