babel.core

Returns the system default locale for a given category, based on environment variables. >>> for name in ['LANGUAGE', 'LC_ALL', 'LC_CTYPE']: ... os.environ[name] = '' >>> os.environ['LANG'] = 'fr_FR.UTF-8' >>> default_locale('LC_MESSAGES') 'fr_FR' The "C" or "POSIX" pseudo-locales are treated as aliases for the "en_US_POSIX" locale: >>> os.environ['LC_MESSAGES'] = 'POSIX' >>> default_locale('LC_MESSAGES') 'en_US_POSIX' The following fallbacks to the variable are always considered: - ``LANGUAGE`` - ``LC_ALL`` - ``LC_CTYPE`` - ``LANG`` :param category: one of the ``LC_XXX`` environment variable names :param aliases: a dictionary of aliases for locale identifiers

Return the dictionary for the given key in the global data. The global data is stored in the ``babel/global.dat`` file and contains information independent of individual locales. >>> get_global('zone_aliases')['UTC'] u'Etc/UTC' >>> get_global('zone_territories')['Europe/Berlin'] u'DE' The keys available are: - ``all_currencies`` - ``currency_fractions`` - ``language_aliases`` - ``likely_subtags`` - ``parent_exceptions`` - ``script_aliases`` - ``territory_aliases`` - ``territory_currencies`` - ``territory_languages`` - ``territory_zones`` - ``variant_aliases`` - ``windows_zone_mapping`` - ``zone_aliases`` - ``zone_territories`` .. note:: The internal structure of the data may change between versions. .. versionadded:: 0.9 :param key: the data key

Find the best match between available and requested locale strings. >>> negotiate_locale(['de_DE', 'en_US'], ['de_DE', 'de_AT']) 'de_DE' >>> negotiate_locale(['de_DE', 'en_US'], ['en', 'de']) 'de' Case is ignored by the algorithm, the result uses the case of the preferred locale identifier: >>> negotiate_locale(['de_DE', 'en_US'], ['de_de', 'de_at']) 'de_DE' >>> negotiate_locale(['de_DE', 'en_US'], ['de_de', 'de_at']) 'de_DE' By default, some web browsers unfortunately do not include the territory in the locale identifier for many locales, and some don't even allow the user to easily add the territory. So while you may prefer using qualified locale identifiers in your web-application, they would not normally match the language-only locale sent by such browsers. To workaround that, this function uses a default mapping of commonly used language-only locale identifiers to identifiers including the territory: >>> negotiate_locale(['ja', 'en_US'], ['ja_JP', 'en_US']) 'ja_JP' Some browsers even use an incorrect or outdated language code, such as "no" for Norwegian, where the correct locale identifier would actually be "nb_NO" (Bokmål) or "nn_NO" (Nynorsk). The aliases are intended to take care of such cases, too: >>> negotiate_locale(['no', 'sv'], ['nb_NO', 'sv_SE']) 'nb_NO' You can override this default mapping by passing a different `aliases` dictionary to this function, or you can bypass the behavior althogher by setting the `aliases` parameter to `None`. :param preferred: the list of locale strings preferred by the user :param available: the list of locale strings available :param sep: character that separates the different parts of the locale strings :param aliases: a dictionary of aliases for locale identifiers

Parse a locale identifier into a tuple of the form ``(language, territory, script, variant, modifier)``. >>> parse_locale('zh_CN') ('zh', 'CN', None, None) >>> parse_locale('zh_Hans_CN') ('zh', 'CN', 'Hans', None) >>> parse_locale('ca_es_valencia') ('ca', 'ES', None, 'VALENCIA') >>> parse_locale('en_150') ('en', '150', None, None) >>> parse_locale('en_us_posix') ('en', 'US', None, 'POSIX') >>> parse_locale('it_IT@euro') ('it', 'IT', None, None, 'euro') >>> parse_locale('it_IT@custom') ('it', 'IT', None, None, 'custom') >>> parse_locale('it_IT@') ('it', 'IT', None, None) The default component separator is "_", but a different separator can be specified using the `sep` parameter. The optional modifier is always separated with "@" and at the end: >>> parse_locale('zh-CN', sep='-') ('zh', 'CN', None, None) >>> parse_locale('zh-CN@custom', sep='-') ('zh', 'CN', None, None, 'custom') If the identifier cannot be parsed into a locale, a `ValueError` exception is raised: >>> parse_locale('not_a_LOCALE_String') Traceback (most recent call last): ... ValueError: 'not_a_LOCALE_String' is not a valid locale identifier Encoding information is removed from the identifier, while modifiers are kept: >>> parse_locale('en_US.UTF-8') ('en', 'US', None, None) >>> parse_locale('de_DE.iso885915@euro') ('de', 'DE', None, None, 'euro') See :rfc:`4646` for more information. :param identifier: the locale identifier string :param sep: character that separates the different components of the locale identifier :raise `ValueError`: if the string does not appear to be a valid locale identifier