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Bugfix for feeds
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login page is free of non accessible elements
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Bugfix editing Authors names
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942 lines
30 KiB
Python
942 lines
30 KiB
Python
# -*- coding: utf-8 -*-
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"""
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babel.core
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~~~~~~~~~~
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Core locale representation and locale data access.
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:copyright: (c) 2013 by the Babel Team.
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:license: BSD, see LICENSE for more details.
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"""
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import os
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from babel import localedata
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from babel._compat import pickle, string_types
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__all__ = ['UnknownLocaleError', 'Locale', 'default_locale', 'negotiate_locale',
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'parse_locale']
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_global_data = None
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def _raise_no_data_error():
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raise RuntimeError('The babel data files are not available. '
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'This usually happens because you are using '
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'a source checkout from Babel and you did '
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'not build the data files. Just make sure '
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'to run "python setup.py import_cldr" before '
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'installing the library.')
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def get_global(key):
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"""Return the dictionary for the given key in the global data.
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The global data is stored in the ``babel/global.dat`` file and contains
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information independent of individual locales.
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>>> get_global('zone_aliases')['UTC']
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u'Etc/GMT'
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>>> get_global('zone_territories')['Europe/Berlin']
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u'DE'
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.. versionadded:: 0.9
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:param key: the data key
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"""
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global _global_data
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if _global_data is None:
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dirname = os.path.join(os.path.dirname(__file__))
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filename = os.path.join(dirname, 'global.dat')
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if not os.path.isfile(filename):
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_raise_no_data_error()
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fileobj = open(filename, 'rb')
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try:
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_global_data = pickle.load(fileobj)
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finally:
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fileobj.close()
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return _global_data.get(key, {})
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LOCALE_ALIASES = {
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'ar': 'ar_SY', 'bg': 'bg_BG', 'bs': 'bs_BA', 'ca': 'ca_ES', 'cs': 'cs_CZ',
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'da': 'da_DK', 'de': 'de_DE', 'el': 'el_GR', 'en': 'en_US', 'es': 'es_ES',
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'et': 'et_EE', 'fa': 'fa_IR', 'fi': 'fi_FI', 'fr': 'fr_FR', 'gl': 'gl_ES',
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'he': 'he_IL', 'hu': 'hu_HU', 'id': 'id_ID', 'is': 'is_IS', 'it': 'it_IT',
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'ja': 'ja_JP', 'km': 'km_KH', 'ko': 'ko_KR', 'lt': 'lt_LT', 'lv': 'lv_LV',
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'mk': 'mk_MK', 'nl': 'nl_NL', 'nn': 'nn_NO', 'no': 'nb_NO', 'pl': 'pl_PL',
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'pt': 'pt_PT', 'ro': 'ro_RO', 'ru': 'ru_RU', 'sk': 'sk_SK', 'sl': 'sl_SI',
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'sv': 'sv_SE', 'th': 'th_TH', 'tr': 'tr_TR', 'uk': 'uk_UA'
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}
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class UnknownLocaleError(Exception):
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"""Exception thrown when a locale is requested for which no locale data
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is available.
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"""
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def __init__(self, identifier):
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"""Create the exception.
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:param identifier: the identifier string of the unsupported locale
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"""
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Exception.__init__(self, 'unknown locale %r' % identifier)
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#: The identifier of the locale that could not be found.
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self.identifier = identifier
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class Locale(object):
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"""Representation of a specific locale.
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>>> locale = Locale('en', 'US')
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>>> repr(locale)
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"Locale('en', territory='US')"
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>>> locale.display_name
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u'English (United States)'
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A `Locale` object can also be instantiated from a raw locale string:
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>>> locale = Locale.parse('en-US', sep='-')
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>>> repr(locale)
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"Locale('en', territory='US')"
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`Locale` objects provide access to a collection of locale data, such as
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territory and language names, number and date format patterns, and more:
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>>> locale.number_symbols['decimal']
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u'.'
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If a locale is requested for which no locale data is available, an
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`UnknownLocaleError` is raised:
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>>> Locale.parse('en_DE')
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Traceback (most recent call last):
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...
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UnknownLocaleError: unknown locale 'en_DE'
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For more information see :rfc:`3066`.
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"""
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def __init__(self, language, territory=None, script=None, variant=None):
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"""Initialize the locale object from the given identifier components.
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>>> locale = Locale('en', 'US')
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>>> locale.language
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'en'
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>>> locale.territory
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'US'
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:param language: the language code
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:param territory: the territory (country or region) code
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:param script: the script code
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:param variant: the variant code
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:raise `UnknownLocaleError`: if no locale data is available for the
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requested locale
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"""
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#: the language code
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self.language = language
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#: the territory (country or region) code
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self.territory = territory
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#: the script code
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self.script = script
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#: the variant code
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self.variant = variant
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self.__data = None
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identifier = str(self)
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if not localedata.exists(identifier):
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raise UnknownLocaleError(identifier)
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@classmethod
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def default(cls, category=None, aliases=LOCALE_ALIASES):
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"""Return the system default locale for the specified category.
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>>> for name in ['LANGUAGE', 'LC_ALL', 'LC_CTYPE', 'LC_MESSAGES']:
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... os.environ[name] = ''
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>>> os.environ['LANG'] = 'fr_FR.UTF-8'
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>>> Locale.default('LC_MESSAGES')
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Locale('fr', territory='FR')
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The following fallbacks to the variable are always considered:
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- ``LANGUAGE``
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- ``LC_ALL``
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- ``LC_CTYPE``
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- ``LANG``
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:param category: one of the ``LC_XXX`` environment variable names
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:param aliases: a dictionary of aliases for locale identifiers
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"""
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# XXX: use likely subtag expansion here instead of the
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# aliases dictionary.
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locale_string = default_locale(category, aliases=aliases)
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return cls.parse(locale_string)
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@classmethod
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def negotiate(cls, preferred, available, sep='_', aliases=LOCALE_ALIASES):
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"""Find the best match between available and requested locale strings.
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>>> Locale.negotiate(['de_DE', 'en_US'], ['de_DE', 'de_AT'])
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Locale('de', territory='DE')
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>>> Locale.negotiate(['de_DE', 'en_US'], ['en', 'de'])
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Locale('de')
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>>> Locale.negotiate(['de_DE', 'de'], ['en_US'])
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You can specify the character used in the locale identifiers to separate
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the differnet components. This separator is applied to both lists. Also,
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case is ignored in the comparison:
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>>> Locale.negotiate(['de-DE', 'de'], ['en-us', 'de-de'], sep='-')
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Locale('de', territory='DE')
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:param preferred: the list of locale identifers preferred by the user
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:param available: the list of locale identifiers available
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:param aliases: a dictionary of aliases for locale identifiers
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"""
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identifier = negotiate_locale(preferred, available, sep=sep,
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aliases=aliases)
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if identifier:
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return Locale.parse(identifier, sep=sep)
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@classmethod
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def parse(cls, identifier, sep='_', resolve_likely_subtags=True):
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"""Create a `Locale` instance for the given locale identifier.
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>>> l = Locale.parse('de-DE', sep='-')
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>>> l.display_name
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u'Deutsch (Deutschland)'
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If the `identifier` parameter is not a string, but actually a `Locale`
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object, that object is returned:
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>>> Locale.parse(l)
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Locale('de', territory='DE')
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This also can perform resolving of likely subtags which it does
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by default. This is for instance useful to figure out the most
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likely locale for a territory you can use ``'und'`` as the
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language tag:
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>>> Locale.parse('und_AT')
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Locale('de', territory='AT')
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:param identifier: the locale identifier string
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:param sep: optional component separator
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:param resolve_likely_subtags: if this is specified then a locale will
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have its likely subtag resolved if the
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locale otherwise does not exist. For
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instance ``zh_TW`` by itself is not a
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locale that exists but Babel can
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automatically expand it to the full
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form of ``zh_hant_TW``. Note that this
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expansion is only taking place if no
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locale exists otherwise. For instance
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there is a locale ``en`` that can exist
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by itself.
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:raise `ValueError`: if the string does not appear to be a valid locale
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identifier
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:raise `UnknownLocaleError`: if no locale data is available for the
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requested locale
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"""
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if identifier is None:
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return None
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elif isinstance(identifier, Locale):
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return identifier
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elif not isinstance(identifier, string_types):
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raise TypeError('Unxpected value for identifier: %r' % (identifier,))
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parts = parse_locale(identifier, sep=sep)
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input_id = get_locale_identifier(parts)
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def _try_load(parts):
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try:
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return cls(*parts)
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except UnknownLocaleError:
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return None
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def _try_load_reducing(parts):
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# Success on first hit, return it.
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locale = _try_load(parts)
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if locale is not None:
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return locale
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# Now try without script and variant
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locale = _try_load(parts[:2])
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if locale is not None:
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return locale
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locale = _try_load(parts)
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if locale is not None:
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return locale
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if not resolve_likely_subtags:
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raise UnknownLocaleError(input_id)
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# From here onwards is some very bad likely subtag resolving. This
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# whole logic is not entirely correct but good enough (tm) for the
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# time being. This has been added so that zh_TW does not cause
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# errors for people when they upgrade. Later we should properly
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# implement ICU like fuzzy locale objects and provide a way to
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# maximize and minimize locale tags.
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language, territory, script, variant = parts
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language = get_global('language_aliases').get(language, language)
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territory = get_global('territory_aliases').get(territory, territory)
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script = get_global('script_aliases').get(script, script)
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variant = get_global('variant_aliases').get(variant, variant)
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if territory == 'ZZ':
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territory = None
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if script == 'Zzzz':
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script = None
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parts = language, territory, script, variant
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# First match: try the whole identifier
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new_id = get_locale_identifier(parts)
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likely_subtag = get_global('likely_subtags').get(new_id)
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if likely_subtag is not None:
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locale = _try_load_reducing(parse_locale(likely_subtag))
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if locale is not None:
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return locale
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# If we did not find anything so far, try again with a
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# simplified identifier that is just the language
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likely_subtag = get_global('likely_subtags').get(language)
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if likely_subtag is not None:
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language2, _, script2, variant2 = parse_locale(likely_subtag)
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locale = _try_load_reducing((language2, territory, script2, variant2))
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if locale is not None:
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return locale
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raise UnknownLocaleError(input_id)
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def __eq__(self, other):
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for key in ('language', 'territory', 'script', 'variant'):
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if not hasattr(other, key):
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return False
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return (self.language == other.language) and \
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(self.territory == other.territory) and \
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(self.script == other.script) and \
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(self.variant == other.variant)
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def __ne__(self, other):
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return not self.__eq__(other)
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def __repr__(self):
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parameters = ['']
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for key in ('territory', 'script', 'variant'):
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value = getattr(self, key)
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if value is not None:
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parameters.append('%s=%r' % (key, value))
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parameter_string = '%r' % self.language + ', '.join(parameters)
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return 'Locale(%s)' % parameter_string
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def __str__(self):
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return get_locale_identifier((self.language, self.territory,
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self.script, self.variant))
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@property
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def _data(self):
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if self.__data is None:
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self.__data = localedata.LocaleDataDict(localedata.load(str(self)))
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return self.__data
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def get_display_name(self, locale=None):
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"""Return the display name of the locale using the given locale.
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The display name will include the language, territory, script, and
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variant, if those are specified.
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>>> Locale('zh', 'CN', script='Hans').get_display_name('en')
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u'Chinese (Simplified, China)'
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:param locale: the locale to use
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"""
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if locale is None:
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locale = self
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locale = Locale.parse(locale)
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retval = locale.languages.get(self.language)
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if self.territory or self.script or self.variant:
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details = []
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if self.script:
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details.append(locale.scripts.get(self.script))
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if self.territory:
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details.append(locale.territories.get(self.territory))
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if self.variant:
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details.append(locale.variants.get(self.variant))
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details = filter(None, details)
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if details:
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retval += ' (%s)' % u', '.join(details)
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return retval
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display_name = property(get_display_name, doc="""\
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The localized display name of the locale.
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>>> Locale('en').display_name
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u'English'
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>>> Locale('en', 'US').display_name
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u'English (United States)'
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>>> Locale('sv').display_name
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u'svenska'
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:type: `unicode`
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""")
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def get_language_name(self, locale=None):
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"""Return the language of this locale in the given locale.
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>>> Locale('zh', 'CN', script='Hans').get_language_name('de')
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u'Chinesisch'
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.. versionadded:: 1.0
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:param locale: the locale to use
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"""
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if locale is None:
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locale = self
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locale = Locale.parse(locale)
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return locale.languages.get(self.language)
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language_name = property(get_language_name, doc="""\
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The localized language name of the locale.
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>>> Locale('en', 'US').language_name
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u'English'
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""")
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def get_territory_name(self, locale=None):
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"""Return the territory name in the given locale."""
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if locale is None:
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locale = self
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locale = Locale.parse(locale)
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return locale.territories.get(self.territory)
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territory_name = property(get_territory_name, doc="""\
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The localized territory name of the locale if available.
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>>> Locale('de', 'DE').territory_name
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u'Deutschland'
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""")
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def get_script_name(self, locale=None):
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"""Return the script name in the given locale."""
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if locale is None:
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locale = self
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locale = Locale.parse(locale)
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return locale.scripts.get(self.script)
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script_name = property(get_script_name, doc="""\
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The localized script name of the locale if available.
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>>> Locale('ms', 'SG', script='Latn').script_name
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u'Latin'
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""")
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@property
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def english_name(self):
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"""The english display name of the locale.
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>>> Locale('de').english_name
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u'German'
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>>> Locale('de', 'DE').english_name
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u'German (Germany)'
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:type: `unicode`"""
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return self.get_display_name(Locale('en'))
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#{ General Locale Display Names
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@property
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def languages(self):
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"""Mapping of language codes to translated language names.
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>>> Locale('de', 'DE').languages['ja']
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u'Japanisch'
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See `ISO 639 <http://www.loc.gov/standards/iso639-2/>`_ for
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more information.
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"""
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return self._data['languages']
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@property
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def scripts(self):
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"""Mapping of script codes to translated script names.
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>>> Locale('en', 'US').scripts['Hira']
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u'Hiragana'
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See `ISO 15924 <http://www.evertype.com/standards/iso15924/>`_
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for more information.
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"""
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return self._data['scripts']
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@property
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def territories(self):
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"""Mapping of script codes to translated script names.
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>>> Locale('es', 'CO').territories['DE']
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u'Alemania'
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See `ISO 3166 <http://www.iso.org/iso/en/prods-services/iso3166ma/>`_
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for more information.
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"""
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return self._data['territories']
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@property
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def variants(self):
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"""Mapping of script codes to translated script names.
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>>> Locale('de', 'DE').variants['1901']
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u'Alte deutsche Rechtschreibung'
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"""
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return self._data['variants']
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#{ Number Formatting
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@property
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def currencies(self):
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"""Mapping of currency codes to translated currency names. This
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only returns the generic form of the currency name, not the count
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specific one. If an actual number is requested use the
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:func:`babel.numbers.get_currency_name` function.
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>>> Locale('en').currencies['COP']
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u'Colombian Peso'
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>>> Locale('de', 'DE').currencies['COP']
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u'Kolumbianischer Peso'
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"""
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return self._data['currency_names']
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@property
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def currency_symbols(self):
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"""Mapping of currency codes to symbols.
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>>> Locale('en', 'US').currency_symbols['USD']
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u'$'
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>>> Locale('es', 'CO').currency_symbols['USD']
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u'US$'
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"""
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return self._data['currency_symbols']
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@property
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def number_symbols(self):
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"""Symbols used in number formatting.
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>>> Locale('fr', 'FR').number_symbols['decimal']
|
|
u','
|
|
"""
|
|
return self._data['number_symbols']
|
|
|
|
@property
|
|
def decimal_formats(self):
|
|
"""Locale patterns for decimal number formatting.
|
|
|
|
>>> Locale('en', 'US').decimal_formats[None]
|
|
<NumberPattern u'#,##0.###'>
|
|
"""
|
|
return self._data['decimal_formats']
|
|
|
|
@property
|
|
def currency_formats(self):
|
|
"""Locale patterns for currency number formatting.
|
|
|
|
>>> print Locale('en', 'US').currency_formats[None]
|
|
<NumberPattern u'\\xa4#,##0.00'>
|
|
"""
|
|
return self._data['currency_formats']
|
|
|
|
@property
|
|
def percent_formats(self):
|
|
"""Locale patterns for percent number formatting.
|
|
|
|
>>> Locale('en', 'US').percent_formats[None]
|
|
<NumberPattern u'#,##0%'>
|
|
"""
|
|
return self._data['percent_formats']
|
|
|
|
@property
|
|
def scientific_formats(self):
|
|
"""Locale patterns for scientific number formatting.
|
|
|
|
>>> Locale('en', 'US').scientific_formats[None]
|
|
<NumberPattern u'#E0'>
|
|
"""
|
|
return self._data['scientific_formats']
|
|
|
|
#{ Calendar Information and Date Formatting
|
|
|
|
@property
|
|
def periods(self):
|
|
"""Locale display names for day periods (AM/PM).
|
|
|
|
>>> Locale('en', 'US').periods['am']
|
|
u'AM'
|
|
"""
|
|
return self._data['periods']
|
|
|
|
@property
|
|
def days(self):
|
|
"""Locale display names for weekdays.
|
|
|
|
>>> Locale('de', 'DE').days['format']['wide'][3]
|
|
u'Donnerstag'
|
|
"""
|
|
return self._data['days']
|
|
|
|
@property
|
|
def months(self):
|
|
"""Locale display names for months.
|
|
|
|
>>> Locale('de', 'DE').months['format']['wide'][10]
|
|
u'Oktober'
|
|
"""
|
|
return self._data['months']
|
|
|
|
@property
|
|
def quarters(self):
|
|
"""Locale display names for quarters.
|
|
|
|
>>> Locale('de', 'DE').quarters['format']['wide'][1]
|
|
u'1. Quartal'
|
|
"""
|
|
return self._data['quarters']
|
|
|
|
@property
|
|
def eras(self):
|
|
"""Locale display names for eras.
|
|
|
|
>>> Locale('en', 'US').eras['wide'][1]
|
|
u'Anno Domini'
|
|
>>> Locale('en', 'US').eras['abbreviated'][0]
|
|
u'BC'
|
|
"""
|
|
return self._data['eras']
|
|
|
|
@property
|
|
def time_zones(self):
|
|
"""Locale display names for time zones.
|
|
|
|
>>> Locale('en', 'US').time_zones['Europe/London']['long']['daylight']
|
|
u'British Summer Time'
|
|
>>> Locale('en', 'US').time_zones['America/St_Johns']['city']
|
|
u'St. John\u2019s'
|
|
"""
|
|
return self._data['time_zones']
|
|
|
|
@property
|
|
def meta_zones(self):
|
|
"""Locale display names for meta time zones.
|
|
|
|
Meta time zones are basically groups of different Olson time zones that
|
|
have the same GMT offset and daylight savings time.
|
|
|
|
>>> Locale('en', 'US').meta_zones['Europe_Central']['long']['daylight']
|
|
u'Central European Summer Time'
|
|
|
|
.. versionadded:: 0.9
|
|
"""
|
|
return self._data['meta_zones']
|
|
|
|
@property
|
|
def zone_formats(self):
|
|
"""Patterns related to the formatting of time zones.
|
|
|
|
>>> Locale('en', 'US').zone_formats['fallback']
|
|
u'%(1)s (%(0)s)'
|
|
>>> Locale('pt', 'BR').zone_formats['region']
|
|
u'Hor\\xe1rio %s'
|
|
|
|
.. versionadded:: 0.9
|
|
"""
|
|
return self._data['zone_formats']
|
|
|
|
@property
|
|
def first_week_day(self):
|
|
"""The first day of a week, with 0 being Monday.
|
|
|
|
>>> Locale('de', 'DE').first_week_day
|
|
0
|
|
>>> Locale('en', 'US').first_week_day
|
|
6
|
|
"""
|
|
return self._data['week_data']['first_day']
|
|
|
|
@property
|
|
def weekend_start(self):
|
|
"""The day the weekend starts, with 0 being Monday.
|
|
|
|
>>> Locale('de', 'DE').weekend_start
|
|
5
|
|
"""
|
|
return self._data['week_data']['weekend_start']
|
|
|
|
@property
|
|
def weekend_end(self):
|
|
"""The day the weekend ends, with 0 being Monday.
|
|
|
|
>>> Locale('de', 'DE').weekend_end
|
|
6
|
|
"""
|
|
return self._data['week_data']['weekend_end']
|
|
|
|
@property
|
|
def min_week_days(self):
|
|
"""The minimum number of days in a week so that the week is counted as
|
|
the first week of a year or month.
|
|
|
|
>>> Locale('de', 'DE').min_week_days
|
|
4
|
|
"""
|
|
return self._data['week_data']['min_days']
|
|
|
|
@property
|
|
def date_formats(self):
|
|
"""Locale patterns for date formatting.
|
|
|
|
>>> Locale('en', 'US').date_formats['short']
|
|
<DateTimePattern u'M/d/yy'>
|
|
>>> Locale('fr', 'FR').date_formats['long']
|
|
<DateTimePattern u'd MMMM y'>
|
|
"""
|
|
return self._data['date_formats']
|
|
|
|
@property
|
|
def time_formats(self):
|
|
"""Locale patterns for time formatting.
|
|
|
|
>>> Locale('en', 'US').time_formats['short']
|
|
<DateTimePattern u'h:mm a'>
|
|
>>> Locale('fr', 'FR').time_formats['long']
|
|
<DateTimePattern u'HH:mm:ss z'>
|
|
"""
|
|
return self._data['time_formats']
|
|
|
|
@property
|
|
def datetime_formats(self):
|
|
"""Locale patterns for datetime formatting.
|
|
|
|
>>> Locale('en').datetime_formats['full']
|
|
u"{1} 'at' {0}"
|
|
>>> Locale('th').datetime_formats['medium']
|
|
u'{1}, {0}'
|
|
"""
|
|
return self._data['datetime_formats']
|
|
|
|
@property
|
|
def plural_form(self):
|
|
"""Plural rules for the locale.
|
|
|
|
>>> Locale('en').plural_form(1)
|
|
'one'
|
|
>>> Locale('en').plural_form(0)
|
|
'other'
|
|
>>> Locale('fr').plural_form(0)
|
|
'one'
|
|
>>> Locale('ru').plural_form(100)
|
|
'many'
|
|
"""
|
|
return self._data['plural_form']
|
|
|
|
|
|
def default_locale(category=None, aliases=LOCALE_ALIASES):
|
|
"""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
|
|
"""
|
|
varnames = (category, 'LANGUAGE', 'LC_ALL', 'LC_CTYPE', 'LANG')
|
|
for name in filter(None, varnames):
|
|
locale = os.getenv(name)
|
|
if locale:
|
|
if name == 'LANGUAGE' and ':' in locale:
|
|
# the LANGUAGE variable may contain a colon-separated list of
|
|
# language codes; we just pick the language on the list
|
|
locale = locale.split(':')[0]
|
|
if locale in ('C', 'POSIX'):
|
|
locale = 'en_US_POSIX'
|
|
elif aliases and locale in aliases:
|
|
locale = aliases[locale]
|
|
try:
|
|
return get_locale_identifier(parse_locale(locale))
|
|
except ValueError:
|
|
pass
|
|
|
|
|
|
def negotiate_locale(preferred, available, sep='_', aliases=LOCALE_ALIASES):
|
|
"""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 langauge-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
|
|
"""
|
|
available = [a.lower() for a in available if a]
|
|
for locale in preferred:
|
|
ll = locale.lower()
|
|
if ll in available:
|
|
return locale
|
|
if aliases:
|
|
alias = aliases.get(ll)
|
|
if alias:
|
|
alias = alias.replace('_', sep)
|
|
if alias.lower() in available:
|
|
return alias
|
|
parts = locale.split(sep)
|
|
if len(parts) > 1 and parts[0].lower() in available:
|
|
return parts[0]
|
|
return None
|
|
|
|
|
|
def parse_locale(identifier, sep='_'):
|
|
"""Parse a locale identifier into a tuple of the form ``(language,
|
|
territory, script, variant)``.
|
|
|
|
>>> parse_locale('zh_CN')
|
|
('zh', 'CN', None, None)
|
|
>>> parse_locale('zh_Hans_CN')
|
|
('zh', 'CN', 'Hans', None)
|
|
|
|
The default component separator is "_", but a different separator can be
|
|
specified using the `sep` parameter:
|
|
|
|
>>> parse_locale('zh-CN', sep='-')
|
|
('zh', 'CN', None, None)
|
|
|
|
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 and locale modifiers are removed from the identifier:
|
|
|
|
>>> parse_locale('it_IT@euro')
|
|
('it', 'IT', None, None)
|
|
>>> parse_locale('en_US.UTF-8')
|
|
('en', 'US', None, None)
|
|
>>> parse_locale('de_DE.iso885915@euro')
|
|
('de', 'DE', None, None)
|
|
|
|
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
|
|
"""
|
|
if '.' in identifier:
|
|
# this is probably the charset/encoding, which we don't care about
|
|
identifier = identifier.split('.', 1)[0]
|
|
if '@' in identifier:
|
|
# this is a locale modifier such as @euro, which we don't care about
|
|
# either
|
|
identifier = identifier.split('@', 1)[0]
|
|
|
|
parts = identifier.split(sep)
|
|
lang = parts.pop(0).lower()
|
|
if not lang.isalpha():
|
|
raise ValueError('expected only letters, got %r' % lang)
|
|
|
|
script = territory = variant = None
|
|
if parts:
|
|
if len(parts[0]) == 4 and parts[0].isalpha():
|
|
script = parts.pop(0).title()
|
|
|
|
if parts:
|
|
if len(parts[0]) == 2 and parts[0].isalpha():
|
|
territory = parts.pop(0).upper()
|
|
elif len(parts[0]) == 3 and parts[0].isdigit():
|
|
territory = parts.pop(0)
|
|
|
|
if parts:
|
|
if len(parts[0]) == 4 and parts[0][0].isdigit() or \
|
|
len(parts[0]) >= 5 and parts[0][0].isalpha():
|
|
variant = parts.pop()
|
|
|
|
if parts:
|
|
raise ValueError('%r is not a valid locale identifier' % identifier)
|
|
|
|
return lang, territory, script, variant
|
|
|
|
|
|
def get_locale_identifier(tup, sep='_'):
|
|
"""The reverse of :func:`parse_locale`. It creates a locale identifier out
|
|
of a ``(language, territory, script, variant)`` tuple. Items can be set to
|
|
``None`` and trailing ``None``\s can also be left out of the tuple.
|
|
|
|
>>> get_locale_identifier(('de', 'DE', None, '1999'))
|
|
'de_DE_1999'
|
|
|
|
.. versionadded:: 1.0
|
|
|
|
:param tup: the tuple as returned by :func:`parse_locale`.
|
|
:param sep: the separator for the identifier.
|
|
"""
|
|
tup = tuple(tup[:4])
|
|
lang, territory, script, variant = tup + (None,) * (4 - len(tup))
|
|
return sep.join(filter(None, (lang, script, territory, variant)))
|