babel.dates.format_timedelta throws KeyError exception on certain locale

[khanguyen-yousician]

Overview Description

babel.dates.format_timedelta throws KeyError exception on certain locale. Version 2.7.0

Steps to Reproduce

from datetime import timedelta
import babel
from babel.core import Locale
from babel.dates import format_timedelta


def try_format(locale):
    try:
        format_timedelta(
            timedelta(hours=1),
            granularity="hour",
            threshold=float("inf"),
            format="narrow",
            locale=locale,
        )
        return True
    except Exception as e:
        print('%s => %s: %s' % (locale, e.__class__.__name__, e))
    return False


from babel.localedata import locale_identifiers

failed = 0
for locale in sorted(locale_identifiers()):
    if not try_format(locale):
        failed += 1

Actual Results

hr => KeyError: 'one'
hr_BA => KeyError: 'one'
hr_HR => KeyError: 'one'
pt => KeyError: 'one'
pt_BR => KeyError: 'one'

Expected Results

No KeyError exception.

[akx]

Hi! The KeyError problem was fixed by #827, but not all of those locales have narrow data, so format_timedelta() would return an empty string.

[akx]

With #827 merged (i.e. with Babel 3.10), the repro script doesn't raise exceptions. Thank you for the report!