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"""Activate, get and deactivate translations."""
import gettext as gettext_module
import os.path
from threading import local
__all__ = ["activate", "deactivate", "gettext", "ngettext", "thousands_separator"]
_TRANSLATIONS = {None: gettext_module.NullTranslations()}
_CURRENT = local()
# Mapping of locale to thousands separator
_THOUSANDS_SEPARATOR = {
"fr_FR": " ",
}
def _get_default_locale_path():
try:
if __file__ is None:
return None
return os.path.join(os.path.dirname(__file__), "locale")
except NameError:
return None
def get_translation():
try:
return _TRANSLATIONS[_CURRENT.locale]
except (AttributeError, KeyError):
return _TRANSLATIONS[None]
def activate(locale, path=None):
"""Activate internationalisation.
Set `locale` as current locale. Search for locale in directory `path`.
Args:
locale (str): Language name, e.g. `en_GB`.
path (str): Path to search for locales.
Returns:
dict: Translations.
Raises:
Exception: If humanize cannot find the locale folder.
"""
if path is None:
path = _get_default_locale_path()
if path is None:
raise Exception(
"Humanize cannot determinate the default location of the 'locale' folder. "
"You need to pass the path explicitly."
)
if locale not in _TRANSLATIONS:
translation = gettext_module.translation("humanize", path, [locale])
_TRANSLATIONS[locale] = translation
_CURRENT.locale = locale
return _TRANSLATIONS[locale]
def deactivate():
"""Deactivate internationalisation."""
_CURRENT.locale = None
def gettext(message):
"""Get translation.
Args:
message (str): Text to translate.
Returns:
str: Translated text.
"""
return get_translation().gettext(message)
def pgettext(msgctxt, message):
"""Fetches a particular translation.
It works with `msgctxt` .po modifiers and allows duplicate keys with different
translations.
Args:
msgctxt (str): Context of the translation.
message (str): Text to translate.
Returns:
str: Translated text.
"""
# This GNU gettext function was added in Python 3.8, so for older versions we
# reimplement it. It works by joining `msgctx` and `message` by '4' byte.
try:
# Python 3.8+
return get_translation().pgettext(msgctxt, message)
except AttributeError:
# Python 3.7 and older
key = msgctxt + "\x04" + message
translation = get_translation().gettext(key)
return message if translation == key else translation
def ngettext(message, plural, num):
"""Plural version of gettext.
Args:
message (str): Singular text to translate.
plural (str): Plural text to translate.
num (str): The number (e.g. item count) to determine translation for the
respective grammatical number.
Returns:
str: Translated text.
"""
return get_translation().ngettext(message, plural, num)
def gettext_noop(message):
"""Mark a string as a translation string without translating it.
Example usage:
```python
CONSTANTS = [gettext_noop('first'), gettext_noop('second')]
def num_name(n):
return gettext(CONSTANTS[n])
```
Args:
message (str): Text to translate in the future.
Returns:
str: Original text, unchanged.
"""
return message
def ngettext_noop(singular, plural):
"""Mark two strings as pluralized translations without translating them.
Example usage:
```python
CONSTANTS = [ngettext_noop('first', 'firsts'), ngettext_noop('second', 'seconds')]
def num_name(n):
return ngettext(*CONSTANTS[n])
```
Args:
singular (str): Singular text to translate in the future.
plural (str): Plural text to translate in the future.
Returns:
tuple: Original text, unchanged.
"""
return (singular, plural)
def thousands_separator() -> str:
"""Return the thousands separator for a locale, default to comma.
Returns:
str: Thousands separator.
"""
try:
sep = _THOUSANDS_SEPARATOR[_CURRENT.locale]
except (AttributeError, KeyError):
sep = ","
return sep