Mercurial > babel > old > babel-test
annotate babel/core.py @ 148:37f4875bad88
The `LANGUAGE` environment variable may contain a colon-separated list of language codes.
| author | cmlenz |
|---|---|
| date | Wed, 20 Jun 2007 20:18:52 +0000 |
| parents | b75ae5def3b1 |
| children | e1985b8cdcd6 |
| rev | line source |
|---|---|
| 1 | 1 # -*- coding: utf-8 -*- |
| 2 # | |
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3 # Copyright (C) 2007 Edgewall Software |
| 1 | 4 # All rights reserved. |
| 5 # | |
| 6 # This software is licensed as described in the file COPYING, which | |
| 7 # you should have received as part of this distribution. The terms | |
| 8 # are also available at http://babel.edgewall.org/wiki/License. | |
| 9 # | |
| 10 # This software consists of voluntary contributions made by many | |
| 11 # individuals. For the exact contribution history, see the revision | |
| 12 # history and logs, available at http://babel.edgewall.org/log/. | |
| 13 | |
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14 """Core locale representation and locale data access.""" |
| 1 | 15 |
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16 import os |
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17 |
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18 from babel import localedata |
| 1 | 19 |
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20 __all__ = ['UnknownLocaleError', 'Locale', 'default_locale', 'negotiate_locale', |
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21 'parse_locale'] |
| 1 | 22 __docformat__ = 'restructuredtext en' |
| 23 | |
| 24 | |
| 31 | 25 class UnknownLocaleError(Exception): |
| 26 """Exception thrown when a locale is requested for which no locale data | |
| 27 is available. | |
| 28 """ | |
| 29 | |
| 30 def __init__(self, identifier): | |
| 31 """Create the exception. | |
| 32 | |
| 33 :param identifier: the identifier string of the unsupported locale | |
| 34 """ | |
| 35 Exception.__init__(self, 'unknown locale %r' % identifier) | |
| 36 self.identifier = identifier | |
| 37 | |
| 38 | |
| 1 | 39 class Locale(object): |
| 40 """Representation of a specific locale. | |
| 41 | |
| 42 >>> locale = Locale('en', territory='US') | |
| 43 >>> repr(locale) | |
| 44 '<Locale "en_US">' | |
| 45 >>> locale.display_name | |
| 46 u'English (United States)' | |
| 47 | |
| 48 A `Locale` object can also be instantiated from a raw locale string: | |
| 49 | |
| 50 >>> locale = Locale.parse('en-US', sep='-') | |
| 51 >>> repr(locale) | |
| 52 '<Locale "en_US">' | |
| 53 | |
| 54 `Locale` objects provide access to a collection of locale data, such as | |
| 55 territory and language names, number and date format patterns, and more: | |
| 56 | |
| 57 >>> locale.number_symbols['decimal'] | |
| 58 u'.' | |
| 31 | 59 |
| 60 If a locale is requested for which no locale data is available, an | |
| 61 `UnknownLocaleError` is raised: | |
| 62 | |
| 63 >>> Locale.parse('en_DE') | |
| 64 Traceback (most recent call last): | |
| 65 ... | |
| 66 UnknownLocaleError: unknown locale 'en_DE' | |
| 1 | 67 |
| 68 :see: `IETF RFC 3066 <http://www.ietf.org/rfc/rfc3066.txt>`_ | |
| 69 """ | |
| 70 | |
| 71 def __init__(self, language, territory=None, variant=None): | |
| 72 """Initialize the locale object from the given identifier components. | |
| 73 | |
| 74 >>> locale = Locale('en', 'US') | |
| 75 >>> locale.language | |
| 76 'en' | |
| 77 >>> locale.territory | |
| 78 'US' | |
| 79 | |
| 80 :param language: the language code | |
| 81 :param territory: the territory (country or region) code | |
| 82 :param variant: the variant code | |
| 31 | 83 :raise `UnknownLocaleError`: if no locale data is available for the |
| 84 requested locale | |
| 1 | 85 """ |
| 86 self.language = language | |
| 87 self.territory = territory | |
| 88 self.variant = variant | |
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89 self.__data = None |
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90 |
| 31 | 91 identifier = str(self) |
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92 if not localedata.exists(identifier): |
| 31 | 93 raise UnknownLocaleError(identifier) |
| 1 | 94 |
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95 def default(cls, category=None): |
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96 """Return the system default locale for the specified category. |
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97 |
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98 >>> for name in ['LANGUAGE', 'LC_ALL', 'LC_CTYPE']: |
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99 ... os.environ[name] = '' |
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100 >>> os.environ['LANG'] = 'fr_FR.UTF-8' |
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101 >>> Locale.default('LC_MESSAGES') |
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102 <Locale "fr_FR"> |
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103 |
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104 :param category: one of the ``LC_XXX`` environment variable names |
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105 :return: the value of the variable, or any of the fallbacks |
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106 (``LANGUAGE``, ``LC_ALL``, ``LC_CTYPE``, and ``LANG``) |
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107 :rtype: `Locale` |
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108 """ |
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109 return cls(default_locale(category)) |
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110 default = classmethod(default) |
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111 |
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112 def negotiate(cls, preferred, available, sep='_'): |
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113 """Find the best match between available and requested locale strings. |
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114 |
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115 >>> Locale.negotiate(['de_DE', 'en_US'], ['de_DE', 'de_AT']) |
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116 <Locale "de_DE"> |
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117 >>> Locale.negotiate(['de_DE', 'en_US'], ['en', 'de']) |
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118 <Locale "de"> |
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119 >>> Locale.negotiate(['de_DE', 'de'], ['en_US']) |
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120 |
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121 :param preferred: the list of locale identifers preferred by the user |
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122 :param available: the list of locale identifiers available |
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123 :return: the `Locale` object for the best match, or `None` if no match |
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124 was found |
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125 :rtype: `Locale` |
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126 """ |
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127 identifier = negotiate_locale(preferred, available, sep=sep) |
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128 if identifier: |
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129 return Locale.parse(identifier) |
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130 negotiate = classmethod(negotiate) |
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131 |
| 1 | 132 def parse(cls, identifier, sep='_'): |
| 133 """Create a `Locale` instance for the given locale identifier. | |
| 134 | |
| 135 >>> l = Locale.parse('de-DE', sep='-') | |
| 136 >>> l.display_name | |
| 137 u'Deutsch (Deutschland)' | |
| 138 | |
| 139 If the `identifier` parameter is not a string, but actually a `Locale` | |
| 140 object, that object is returned: | |
| 141 | |
| 142 >>> Locale.parse(l) | |
| 143 <Locale "de_DE"> | |
| 144 | |
| 145 :param identifier: the locale identifier string | |
| 146 :param sep: optional component separator | |
| 147 :return: a corresponding `Locale` instance | |
| 148 :rtype: `Locale` | |
| 149 :raise `ValueError`: if the string does not appear to be a valid locale | |
| 150 identifier | |
| 31 | 151 :raise `UnknownLocaleError`: if no locale data is available for the |
| 152 requested locale | |
| 1 | 153 """ |
| 154 if type(identifier) is cls: | |
| 155 return identifier | |
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156 return cls(*parse_locale(identifier, sep=sep)) |
| 1 | 157 parse = classmethod(parse) |
| 158 | |
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159 def __eq__(self, other): |
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160 return str(self) == str(other) |
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161 |
| 1 | 162 def __repr__(self): |
| 163 return '<Locale "%s">' % str(self) | |
| 164 | |
| 165 def __str__(self): | |
| 166 return '_'.join(filter(None, [self.language, self.territory, | |
| 167 self.variant])) | |
| 168 | |
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169 def _data(self): |
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170 if self.__data is None: |
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171 self.__data = localedata.load(str(self)) |
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172 return self.__data |
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173 _data = property(_data) |
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174 |
| 1 | 175 def display_name(self): |
| 176 retval = self.languages.get(self.language) | |
| 177 if self.territory: | |
| 178 variant = '' | |
| 179 if self.variant: | |
| 180 variant = ', %s' % self.variants.get(self.variant) | |
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181 retval += ' (%s%s)' % (self.territories.get(self.territory), |
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182 variant) |
| 1 | 183 return retval |
| 184 display_name = property(display_name, doc="""\ | |
| 185 The localized display name of the locale. | |
| 186 | |
| 187 >>> Locale('en').display_name | |
| 188 u'English' | |
| 189 >>> Locale('en', 'US').display_name | |
| 190 u'English (United States)' | |
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191 >>> Locale('sv').display_name |
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192 u'svenska' |
| 1 | 193 |
| 194 :type: `unicode` | |
| 195 """) | |
| 196 | |
| 53 | 197 def english_name(self): |
| 198 en = Locale('en') | |
| 199 retval = en.languages.get(self.language) | |
| 200 if self.territory: | |
| 201 variant = '' | |
| 202 if self.variant: | |
| 203 variant = ', %s' % en.variants.get(self.variant) | |
| 204 retval += ' (%s%s)' % (en.territories.get(self.territory), | |
| 205 variant) | |
| 206 return retval | |
| 207 english_name = property(english_name, doc="""\ | |
| 208 The english display name of the locale. | |
| 209 | |
| 210 >>> Locale('de').english_name | |
| 211 u'German' | |
| 212 >>> Locale('de', 'DE').english_name | |
| 213 u'German (Germany)' | |
| 214 | |
| 215 :type: `unicode` | |
| 216 """) | |
| 217 | |
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218 #{ General Locale Display Names |
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219 |
| 1 | 220 def languages(self): |
| 221 return self._data['languages'] | |
| 222 languages = property(languages, doc="""\ | |
| 223 Mapping of language codes to translated language names. | |
| 224 | |
| 225 >>> Locale('de', 'DE').languages['ja'] | |
| 226 u'Japanisch' | |
| 227 | |
| 228 :type: `dict` | |
| 229 :see: `ISO 639 <http://www.loc.gov/standards/iso639-2/>`_ | |
| 230 """) | |
| 231 | |
| 232 def scripts(self): | |
| 233 return self._data['scripts'] | |
| 234 scripts = property(scripts, doc="""\ | |
| 235 Mapping of script codes to translated script names. | |
| 236 | |
| 237 >>> Locale('en', 'US').scripts['Hira'] | |
| 238 u'Hiragana' | |
| 239 | |
| 240 :type: `dict` | |
| 241 :see: `ISO 15924 <http://www.evertype.com/standards/iso15924/>`_ | |
| 242 """) | |
| 243 | |
| 244 def territories(self): | |
| 245 return self._data['territories'] | |
| 246 territories = property(territories, doc="""\ | |
| 247 Mapping of script codes to translated script names. | |
| 248 | |
| 249 >>> Locale('es', 'CO').territories['DE'] | |
| 250 u'Alemania' | |
| 251 | |
| 252 :type: `dict` | |
| 253 :see: `ISO 3166 <http://www.iso.org/iso/en/prods-services/iso3166ma/>`_ | |
| 254 """) | |
| 255 | |
| 256 def variants(self): | |
| 257 return self._data['variants'] | |
| 258 variants = property(variants, doc="""\ | |
| 259 Mapping of script codes to translated script names. | |
| 260 | |
| 261 >>> Locale('de', 'DE').variants['1901'] | |
| 262 u'alte deutsche Rechtschreibung' | |
| 263 | |
| 264 :type: `dict` | |
| 265 """) | |
| 266 | |
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267 #{ Number Formatting |
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268 |
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269 def currencies(self): |
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270 return self._data['currency_names'] |
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271 currencies = property(currencies, doc="""\ |
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272 Mapping of currency codes to translated currency names. |
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273 |
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274 >>> Locale('en').currencies['COP'] |
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275 u'Colombian Peso' |
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276 >>> Locale('de', 'DE').currencies['COP'] |
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277 u'Kolumbianischer Peso' |
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278 |
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279 :type: `dict` |
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280 """) |
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281 |
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282 def currency_symbols(self): |
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283 return self._data['currency_symbols'] |
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284 currency_symbols = property(currency_symbols, doc="""\ |
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285 Mapping of currency codes to symbols. |
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286 |
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287 >>> Locale('en').currency_symbols['USD'] |
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288 u'US$' |
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289 >>> Locale('en', 'US').currency_symbols['USD'] |
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290 u'$' |
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291 |
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292 :type: `dict` |
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293 """) |
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294 |
| 1 | 295 def number_symbols(self): |
| 296 return self._data['number_symbols'] | |
| 297 number_symbols = property(number_symbols, doc="""\ | |
| 298 Symbols used in number formatting. | |
| 299 | |
| 300 >>> Locale('fr', 'FR').number_symbols['decimal'] | |
| 301 u',' | |
| 302 | |
| 303 :type: `dict` | |
| 304 """) | |
| 305 | |
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306 def decimal_formats(self): |
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307 return self._data['decimal_formats'] |
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308 decimal_formats = property(decimal_formats, doc="""\ |
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309 Locale patterns for decimal number formatting. |
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310 |
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311 >>> Locale('en', 'US').decimal_formats[None] |
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312 <NumberPattern u'#,##0.###'> |
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313 |
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314 :type: `dict` |
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315 """) |
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316 |
| 125 | 317 def currency_formats(self): |
| 318 return self._data['currency_formats'] | |
| 319 currency_formats = property(currency_formats, doc=r"""\ | |
| 320 Locale patterns for currency number formatting. | |
| 321 | |
| 322 >>> print Locale('en', 'US').currency_formats[None] | |
| 323 <NumberPattern u'\xa4#,##0.00'> | |
| 324 | |
| 325 :type: `dict` | |
| 326 """) | |
| 327 | |
| 22 | 328 def percent_formats(self): |
| 329 return self._data['percent_formats'] | |
| 330 percent_formats = property(percent_formats, doc="""\ | |
| 331 Locale patterns for percent number formatting. | |
| 332 | |
| 333 >>> Locale('en', 'US').percent_formats[None] | |
| 334 <NumberPattern u'#,##0%'> | |
| 335 | |
| 336 :type: `dict` | |
| 337 """) | |
| 338 | |
| 125 | 339 def scientific_formats(self): |
| 340 return self._data['scientific_formats'] | |
| 341 scientific_formats = property(scientific_formats, doc="""\ | |
| 342 Locale patterns for scientific number formatting. | |
| 343 | |
| 344 >>> Locale('en', 'US').scientific_formats[None] | |
| 345 <NumberPattern u'#E0'> | |
| 346 | |
| 347 :type: `dict` | |
| 348 """) | |
| 349 | |
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350 #{ Calendar Information and Date Formatting |
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351 |
| 1 | 352 def periods(self): |
| 353 return self._data['periods'] | |
| 354 periods = property(periods, doc="""\ | |
| 355 Locale display names for day periods (AM/PM). | |
| 356 | |
| 357 >>> Locale('en', 'US').periods['am'] | |
| 358 u'AM' | |
| 359 | |
| 360 :type: `dict` | |
| 361 """) | |
| 362 | |
| 363 def days(self): | |
| 364 return self._data['days'] | |
| 365 days = property(days, doc="""\ | |
| 366 Locale display names for weekdays. | |
| 367 | |
| 15 | 368 >>> Locale('de', 'DE').days['format']['wide'][3] |
| 1 | 369 u'Donnerstag' |
| 370 | |
| 371 :type: `dict` | |
| 372 """) | |
| 373 | |
| 374 def months(self): | |
| 375 return self._data['months'] | |
| 376 months = property(months, doc="""\ | |
| 377 Locale display names for months. | |
| 378 | |
| 379 >>> Locale('de', 'DE').months['format']['wide'][10] | |
| 380 u'Oktober' | |
| 381 | |
| 382 :type: `dict` | |
| 383 """) | |
| 384 | |
| 385 def quarters(self): | |
| 386 return self._data['quarters'] | |
| 387 quarters = property(quarters, doc="""\ | |
| 388 Locale display names for quarters. | |
| 389 | |
| 390 >>> Locale('de', 'DE').quarters['format']['wide'][1] | |
| 391 u'1. Quartal' | |
| 392 | |
| 393 :type: `dict` | |
| 394 """) | |
| 395 | |
| 396 def eras(self): | |
| 397 return self._data['eras'] | |
| 398 eras = property(eras, doc="""\ | |
| 399 Locale display names for eras. | |
| 400 | |
| 401 >>> Locale('en', 'US').eras['wide'][1] | |
| 402 u'Anno Domini' | |
| 403 >>> Locale('en', 'US').eras['abbreviated'][0] | |
| 404 u'BC' | |
| 405 | |
| 406 :type: `dict` | |
| 407 """) | |
| 408 | |
|
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409 def time_zones(self): |
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410 return self._data['time_zones'] |
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411 time_zones = property(time_zones, doc="""\ |
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412 Locale display names for time zones. |
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413 |
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414 >>> Locale('en', 'US').time_zones['America/Los_Angeles']['long']['standard'] |
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415 u'Pacific Standard Time' |
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416 >>> Locale('en', 'US').time_zones['Europe/Dublin']['city'] |
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417 u'Dublin' |
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418 |
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419 :type: `dict` |
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420 """) |
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421 |
| 34 | 422 def zone_aliases(self): |
| 423 return self._data['zone_aliases'] | |
| 424 zone_aliases = property(zone_aliases, doc="""\ | |
| 425 Mapping of time zone aliases to their respective canonical identifer. | |
| 426 | |
| 427 >>> Locale('en').zone_aliases['UTC'] | |
| 428 'Etc/GMT' | |
| 429 | |
| 430 :type: `dict` | |
| 431 :note: this doesn't really belong here, as it does not change between | |
| 432 locales | |
| 433 """) | |
| 434 | |
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435 def first_week_day(self): |
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436 return self._data['week_data']['first_day'] |
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437 first_week_day = property(first_week_day, doc="""\ |
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438 The first day of a week. |
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439 |
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440 >>> Locale('de', 'DE').first_week_day |
| 15 | 441 0 |
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442 >>> Locale('en', 'US').first_week_day |
| 15 | 443 6 |
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444 |
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445 :type: `int` |
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446 """) |
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447 |
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448 def weekend_start(self): |
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449 return self._data['week_data']['weekend_start'] |
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450 weekend_start = property(weekend_start, doc="""\ |
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451 The day the weekend starts. |
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452 |
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453 >>> Locale('de', 'DE').weekend_start |
| 15 | 454 5 |
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455 |
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456 :type: `int` |
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457 """) |
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458 |
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459 def weekend_end(self): |
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460 return self._data['week_data']['weekend_end'] |
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461 weekend_end = property(weekend_end, doc="""\ |
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462 The day the weekend ends. |
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463 |
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464 >>> Locale('de', 'DE').weekend_end |
| 15 | 465 6 |
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466 |
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467 :type: `int` |
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468 """) |
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469 |
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470 def min_week_days(self): |
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471 return self._data['week_data']['min_days'] |
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472 min_week_days = property(min_week_days, doc="""\ |
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473 The minimum number of days in a week so that the week is counted as the |
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474 first week of a year or month. |
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475 |
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476 >>> Locale('de', 'DE').min_week_days |
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477 4 |
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478 |
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479 :type: `int` |
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480 """) |
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481 |
| 1 | 482 def date_formats(self): |
| 483 return self._data['date_formats'] | |
| 484 date_formats = property(date_formats, doc="""\ | |
| 485 Locale patterns for date formatting. | |
| 486 | |
| 487 >>> Locale('en', 'US').date_formats['short'] | |
|
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488 <DateTimePattern u'M/d/yy'> |
| 1 | 489 >>> Locale('fr', 'FR').date_formats['long'] |
|
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490 <DateTimePattern u'd MMMM yyyy'> |
| 1 | 491 |
| 492 :type: `dict` | |
| 493 """) | |
| 494 | |
| 495 def time_formats(self): | |
| 496 return self._data['time_formats'] | |
| 497 time_formats = property(time_formats, doc="""\ | |
| 498 Locale patterns for time formatting. | |
| 499 | |
| 500 >>> Locale('en', 'US').time_formats['short'] | |
|
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501 <DateTimePattern u'h:mm a'> |
| 1 | 502 >>> Locale('fr', 'FR').time_formats['long'] |
|
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503 <DateTimePattern u'HH:mm:ss z'> |
| 9 | 504 |
| 505 :type: `dict` | |
| 506 """) | |
| 507 | |
| 33 | 508 def datetime_formats(self): |
| 509 return self._data['datetime_formats'] | |
| 510 datetime_formats = property(datetime_formats, doc="""\ | |
| 511 Locale patterns for datetime formatting. | |
| 512 | |
| 513 >>> Locale('en').datetime_formats[None] | |
| 514 u'{1} {0}' | |
| 515 >>> Locale('th').datetime_formats[None] | |
| 516 u'{1}, {0}' | |
| 517 | |
| 518 :type: `dict` | |
| 519 """) | |
| 520 | |
| 1 | 521 |
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522 def default_locale(category=None): |
|
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523 """Returns the system default locale for a given category, based on |
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524 environment variables. |
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525 |
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526 >>> for name in ['LANGUAGE', 'LC_ALL', 'LC_CTYPE']: |
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527 ... os.environ[name] = '' |
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528 >>> os.environ['LANG'] = 'fr_FR.UTF-8' |
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529 >>> default_locale('LC_MESSAGES') |
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530 'fr_FR' |
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531 |
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532 :param category: one of the ``LC_XXX`` environment variable names |
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533 :return: the value of the variable, or any of the fallbacks (``LANGUAGE``, |
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534 ``LC_ALL``, ``LC_CTYPE``, and ``LANG``) |
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535 |
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536 :rtype: `str` |
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537 """ |
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538 varnames = (category, 'LANGUAGE', 'LC_ALL', 'LC_CTYPE', 'LANG') |
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539 for name in filter(None, varnames): |
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540 locale = os.getenv(name) |
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541 if locale: |
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542 if name == 'LANGUAGE' and ':' in locale: |
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543 # the LANGUAGE variable may contain a colon-separated list of |
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544 # language codes; we just pick the language on the list |
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545 locale = locale.split(':')[0] |
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546 return '_'.join(filter(None, parse_locale(locale))) |
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547 |
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548 def negotiate_locale(preferred, available, sep='_'): |
| 1 | 549 """Find the best match between available and requested locale strings. |
| 550 | |
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551 >>> negotiate_locale(['de_DE', 'en_US'], ['de_DE', 'de_AT']) |
| 1 | 552 'de_DE' |
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553 >>> negotiate_locale(['de_DE', 'en_US'], ['en', 'de']) |
| 1 | 554 'de' |
| 555 | |
| 556 :param preferred: the list of locale strings preferred by the user | |
| 557 :param available: the list of locale strings available | |
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558 :param sep: character that separates the different parts of the locale |
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559 strings |
| 1 | 560 :return: the locale identifier for the best match, or `None` if no match |
| 561 was found | |
| 562 :rtype: `str` | |
| 563 """ | |
| 564 for locale in preferred: | |
| 565 if locale in available: | |
| 566 return locale | |
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567 parts = locale.split(sep) |
| 1 | 568 if len(parts) > 1 and parts[0] in available: |
| 569 return parts[0] | |
| 570 return None | |
| 571 | |
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572 def parse_locale(identifier, sep='_'): |
| 1 | 573 """Parse a locale identifier into a ``(language, territory, variant)`` |
| 574 tuple. | |
| 575 | |
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576 >>> parse_locale('zh_CN') |
| 1 | 577 ('zh', 'CN', None) |
| 578 | |
| 579 The default component separator is "_", but a different separator can be | |
| 580 specified using the `sep` parameter: | |
| 581 | |
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582 >>> parse_locale('zh-CN', sep='-') |
| 1 | 583 ('zh', 'CN', None) |
| 584 | |
| 585 :param identifier: the locale identifier string | |
| 586 :param sep: character that separates the different parts of the locale | |
| 587 string | |
| 588 :return: the ``(language, territory, variant)`` tuple | |
| 589 :rtype: `tuple` | |
| 590 :raise `ValueError`: if the string does not appear to be a valid locale | |
| 591 identifier | |
| 592 | |
| 593 :see: `IETF RFC 3066 <http://www.ietf.org/rfc/rfc3066.txt>`_ | |
| 594 """ | |
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595 if '.' in identifier: |
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596 # this is probably the charset/encoding, which we don't care about |
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597 identifier = identifier.split('.', 1)[0] |
| 1 | 598 parts = identifier.split(sep) |
| 599 lang, territory, variant = parts[0].lower(), None, None | |
| 600 if not lang.isalpha(): | |
| 601 raise ValueError('expected only letters, got %r' % lang) | |
| 602 if len(parts) > 1: | |
| 603 territory = parts[1].upper().split('.', 1)[0] | |
| 604 if not territory.isalpha(): | |
| 605 raise ValueError('expected only letters, got %r' % territory) | |
| 606 if len(parts) > 2: | |
| 607 variant = parts[2].upper().split('.', 1)[0] | |
| 608 return lang, territory, variant |