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annotate babel/core.py @ 17:aa33ad077d24

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Minor date formatting improvements.
author cmlenz
date Thu, 31 May 2007 14:20:04 +0000
parents 29ef15a6fd75
children 6c2c9fc7d787
rev   line source
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1 # -*- coding: utf-8 -*-
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2 #
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3 # Copyright (C) 2007 Edgewall Software
3
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4 # All rights reserved.
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5 #
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6 # This software is licensed as described in the file COPYING, which
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7 # you should have received as part of this distribution. The terms
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8 # are also available at http://babel.edgewall.org/wiki/License.
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9 #
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10 # This software consists of voluntary contributions made by many
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11 # individuals. For the exact contribution history, see the revision
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12 # history and logs, available at http://babel.edgewall.org/log/.
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13
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14 """Core locale representation and locale data access gateway."""
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15
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16 import os
3
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17 import pickle
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18 try:
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19 import threading
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20 except ImportError:
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21 import dummy_threading as threading
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22
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23 __all__ = ['Locale', 'negotiate', 'parse']
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24 __docformat__ = 'restructuredtext en'
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25
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26
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27 class Locale(object):
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28 """Representation of a specific locale.
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29
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30 >>> locale = Locale('en', territory='US')
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31 >>> repr(locale)
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32 '<Locale "en_US">'
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33 >>> locale.display_name
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34 u'English (United States)'
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35
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36 A `Locale` object can also be instantiated from a raw locale string:
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37
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38 >>> locale = Locale.parse('en-US', sep='-')
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39 >>> repr(locale)
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40 '<Locale "en_US">'
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41
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42 `Locale` objects provide access to a collection of locale data, such as
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43 territory and language names, number and date format patterns, and more:
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44
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45 >>> locale.number_symbols['decimal']
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46 u'.'
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47
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48 :see: `IETF RFC 3066 <http://www.ietf.org/rfc/rfc3066.txt>`_
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49 """
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50 _cache = {}
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51 _cache_lock = threading.Lock()
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52
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53 def __new__(cls, language, territory=None, variant=None):
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54 """Create new locale object, or load it from the cache if it had already
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55 been instantiated.
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56
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57 >>> l1 = Locale('en')
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58 >>> l2 = Locale('en')
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59 >>> l1 is l2
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60 True
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61
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62 :param language: the language code
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63 :param territory: the territory (country or region) code
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64 :param variant: the variant code
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65 :return: new or existing `Locale` instance
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66 :rtype: `Locale`
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67 """
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68 key = (language, territory, variant)
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69 cls._cache_lock.acquire()
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70 try:
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71 self = cls._cache.get(key)
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72 if self is None:
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73 self = super(Locale, cls).__new__(cls, language, territory,
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74 variant)
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75 cls._cache[key] = self
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76 return self
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77 finally:
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78 self._cache_lock.release()
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79
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80 def __init__(self, language, territory=None, variant=None):
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81 """Initialize the locale object from the given identifier components.
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82
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83 >>> locale = Locale('en', 'US')
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84 >>> locale.language
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85 'en'
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86 >>> locale.territory
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87 'US'
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88
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89 :param language: the language code
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90 :param territory: the territory (country or region) code
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91 :param variant: the variant code
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92 """
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93 self.language = language
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94 self.territory = territory
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95 self.variant = variant
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96 self.__data = None
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97
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98 def parse(cls, identifier, sep='_'):
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99 """Create a `Locale` instance for the given locale identifier.
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100
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101 >>> l = Locale.parse('de-DE', sep='-')
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102 >>> l.display_name
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103 u'Deutsch (Deutschland)'
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104
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105 If the `identifier` parameter is not a string, but actually a `Locale`
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106 object, that object is returned:
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107
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108 >>> Locale.parse(l)
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109 <Locale "de_DE">
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110
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111 :param identifier: the locale identifier string
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112 :param sep: optional component separator
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113 :return: a corresponding `Locale` instance
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114 :rtype: `Locale`
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115 :raise `ValueError`: if the string does not appear to be a valid locale
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116 identifier
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117 """
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118 if type(identifier) is cls:
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119 return identifier
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120 return cls(*parse(identifier, sep=sep))
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121 parse = classmethod(parse)
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122
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123 def __repr__(self):
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124 return '<Locale "%s">' % str(self)
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125
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126 def __str__(self):
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127 return '_'.join(filter(None, [self.language, self.territory,
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128 self.variant]))
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129
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130 def _data(self):
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131 if self.__data is None:
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132 filename = os.path.join(os.path.dirname(__file__),
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133 'localedata/%s.dat' % self)
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134 fileobj = open(filename, 'rb')
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135 try:
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136 self.__data = pickle.load(fileobj)
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137 finally:
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138 fileobj.close()
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139 return self.__data
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140 _data = property(_data)
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141
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142 def display_name(self):
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143 retval = self.languages.get(self.language)
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144 if self.territory:
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145 variant = ''
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146 if self.variant:
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147 variant = ', %s' % self.variants.get(self.variant)
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148 retval += ' (%s%s)' % (self.territories.get(self.territory), variant)
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149 return retval
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150 display_name = property(display_name, doc="""\
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151 The localized display name of the locale.
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152
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153 >>> Locale('en').display_name
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154 u'English'
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155 >>> Locale('en', 'US').display_name
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156 u'English (United States)'
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157
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158 :type: `unicode`
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159 """)
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160
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161 #{ General Locale Display Names
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162
3
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163 def languages(self):
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164 return self._data['languages']
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165 languages = property(languages, doc="""\
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166 Mapping of language codes to translated language names.
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167
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168 >>> Locale('de', 'DE').languages['ja']
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169 u'Japanisch'
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170
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171 :type: `dict`
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172 :see: `ISO 639 <http://www.loc.gov/standards/iso639-2/>`_
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173 """)
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174
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175 def scripts(self):
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176 return self._data['scripts']
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177 scripts = property(scripts, doc="""\
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178 Mapping of script codes to translated script names.
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179
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180 >>> Locale('en', 'US').scripts['Hira']
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181 u'Hiragana'
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182
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183 :type: `dict`
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184 :see: `ISO 15924 <http://www.evertype.com/standards/iso15924/>`_
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185 """)
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186
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187 def territories(self):
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188 return self._data['territories']
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189 territories = property(territories, doc="""\
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190 Mapping of script codes to translated script names.
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191
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192 >>> Locale('es', 'CO').territories['DE']
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193 u'Alemania'
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194
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195 :type: `dict`
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196 :see: `ISO 3166 <http://www.iso.org/iso/en/prods-services/iso3166ma/>`_
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197 """)
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198
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199 def variants(self):
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200 return self._data['variants']
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201 variants = property(variants, doc="""\
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202 Mapping of script codes to translated script names.
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203
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204 >>> Locale('de', 'DE').variants['1901']
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205 u'alte deutsche Rechtschreibung'
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
206
e9eaddab598e Import of initial code base.
cmlenz
parents:
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207 :type: `dict`
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cmlenz
parents:
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208 """)
e9eaddab598e Import of initial code base.
cmlenz
parents:
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209
10
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
210 #{ Number Formatting
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
211
3
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cmlenz
parents:
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212 def number_symbols(self):
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cmlenz
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213 return self._data['number_symbols']
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cmlenz
parents:
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214 number_symbols = property(number_symbols, doc="""\
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
215 Symbols used in number formatting.
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cmlenz
parents:
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216
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cmlenz
parents:
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217 >>> Locale('fr', 'FR').number_symbols['decimal']
e9eaddab598e Import of initial code base.
cmlenz
parents:
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218 u','
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
219
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cmlenz
parents:
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220 :type: `dict`
e9eaddab598e Import of initial code base.
cmlenz
parents:
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221 """)
e9eaddab598e Import of initial code base.
cmlenz
parents:
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222
14
29ef15a6fd75 * Removed pkg_resources/setuptools requirement from various places.
cmlenz
parents: 11
diff changeset
223 def decimal_formats(self):
29ef15a6fd75 * Removed pkg_resources/setuptools requirement from various places.
cmlenz
parents: 11
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224 return self._data['decimal_formats']
29ef15a6fd75 * Removed pkg_resources/setuptools requirement from various places.
cmlenz
parents: 11
diff changeset
225 decimal_formats = property(decimal_formats, doc="""\
29ef15a6fd75 * Removed pkg_resources/setuptools requirement from various places.
cmlenz
parents: 11
diff changeset
226 Locale patterns for decimal number formatting.
29ef15a6fd75 * Removed pkg_resources/setuptools requirement from various places.
cmlenz
parents: 11
diff changeset
227
29ef15a6fd75 * Removed pkg_resources/setuptools requirement from various places.
cmlenz
parents: 11
diff changeset
228 >>> Locale('en', 'US').decimal_formats[None]
29ef15a6fd75 * Removed pkg_resources/setuptools requirement from various places.
cmlenz
parents: 11
diff changeset
229 <NumberPattern u'#,##0.###'>
29ef15a6fd75 * Removed pkg_resources/setuptools requirement from various places.
cmlenz
parents: 11
diff changeset
230
29ef15a6fd75 * Removed pkg_resources/setuptools requirement from various places.
cmlenz
parents: 11
diff changeset
231 :type: `dict`
29ef15a6fd75 * Removed pkg_resources/setuptools requirement from various places.
cmlenz
parents: 11
diff changeset
232 """)
29ef15a6fd75 * Removed pkg_resources/setuptools requirement from various places.
cmlenz
parents: 11
diff changeset
233
10
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
234 #{ Calendar Information and Date Formatting
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
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235
3
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cmlenz
parents:
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236 def periods(self):
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cmlenz
parents:
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237 return self._data['periods']
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cmlenz
parents:
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238 periods = property(periods, doc="""\
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
239 Locale display names for day periods (AM/PM).
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
240
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
241 >>> Locale('en', 'US').periods['am']
e9eaddab598e Import of initial code base.
cmlenz
parents:
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242 u'AM'
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
243
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
244 :type: `dict`
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
245 """)
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
246
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cmlenz
parents:
diff changeset
247 def days(self):
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cmlenz
parents:
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248 return self._data['days']
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cmlenz
parents:
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249 days = property(days, doc="""\
e9eaddab598e Import of initial code base.
cmlenz
parents:
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250 Locale display names for weekdays.
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cmlenz
parents:
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251
17
aa33ad077d24 Minor date formatting improvements.
cmlenz
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diff changeset
252 >>> Locale('de', 'DE').days['format']['wide'][3]
3
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cmlenz
parents:
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253 u'Donnerstag'
e9eaddab598e Import of initial code base.
cmlenz
parents:
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254
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cmlenz
parents:
diff changeset
255 :type: `dict`
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
256 """)
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
257
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cmlenz
parents:
diff changeset
258 def months(self):
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cmlenz
parents:
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259 return self._data['months']
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cmlenz
parents:
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260 months = property(months, doc="""\
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
261 Locale display names for months.
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
262
e9eaddab598e Import of initial code base.
cmlenz
parents:
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263 >>> Locale('de', 'DE').months['format']['wide'][10]
e9eaddab598e Import of initial code base.
cmlenz
parents:
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264 u'Oktober'
e9eaddab598e Import of initial code base.
cmlenz
parents:
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265
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cmlenz
parents:
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266 :type: `dict`
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cmlenz
parents:
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267 """)
e9eaddab598e Import of initial code base.
cmlenz
parents:
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268
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cmlenz
parents:
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269 def quarters(self):
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cmlenz
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270 return self._data['quarters']
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cmlenz
parents:
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271 quarters = property(quarters, doc="""\
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
272 Locale display names for quarters.
e9eaddab598e Import of initial code base.
cmlenz
parents:
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273
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
274 >>> Locale('de', 'DE').quarters['format']['wide'][1]
e9eaddab598e Import of initial code base.
cmlenz
parents:
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275 u'1. Quartal'
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
276
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
277 :type: `dict`
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
278 """)
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
279
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
280 def eras(self):
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cmlenz
parents:
diff changeset
281 return self._data['eras']
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cmlenz
parents:
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282 eras = property(eras, doc="""\
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
283 Locale display names for eras.
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
284
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
285 >>> Locale('en', 'US').eras['wide'][1]
e9eaddab598e Import of initial code base.
cmlenz
parents:
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286 u'Anno Domini'
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
287 >>> Locale('en', 'US').eras['abbreviated'][0]
e9eaddab598e Import of initial code base.
cmlenz
parents:
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288 u'BC'
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
289
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
290 :type: `dict`
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
291 """)
e9eaddab598e Import of initial code base.
cmlenz
parents:
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292
10
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
293 def first_week_day(self):
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
294 return self._data['week_data']['first_day']
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
295 first_week_day = property(first_week_day, doc="""\
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
296 The first day of a week.
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
297
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
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298 >>> Locale('de', 'DE').first_week_day
17
aa33ad077d24 Minor date formatting improvements.
cmlenz
parents: 14
diff changeset
299 0
10
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
300 >>> Locale('en', 'US').first_week_day
17
aa33ad077d24 Minor date formatting improvements.
cmlenz
parents: 14
diff changeset
301 6
10
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
302
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
303 :type: `int`
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
304 """)
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
305
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
306 def weekend_start(self):
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
307 return self._data['week_data']['weekend_start']
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
308 weekend_start = property(weekend_start, doc="""\
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
309 The day the weekend starts.
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
310
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
311 >>> Locale('de', 'DE').weekend_start
17
aa33ad077d24 Minor date formatting improvements.
cmlenz
parents: 14
diff changeset
312 5
10
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
313
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
314 :type: `int`
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
315 """)
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
316
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
317 def weekend_end(self):
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
318 return self._data['week_data']['weekend_end']
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
319 weekend_end = property(weekend_end, doc="""\
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
320 The day the weekend ends.
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
321
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
322 >>> Locale('de', 'DE').weekend_end
17
aa33ad077d24 Minor date formatting improvements.
cmlenz
parents: 14
diff changeset
323 6
10
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
324
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
325 :type: `int`
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
326 """)
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
327
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
328 def min_week_days(self):
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
329 return self._data['week_data']['min_days']
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
330 min_week_days = property(min_week_days, doc="""\
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
331 The minimum number of days in a week so that the week is counted as the
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
332 first week of a year or month.
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
333
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
334 >>> Locale('de', 'DE').min_week_days
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
335 4
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
336
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
337 :type: `int`
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
338 """)
0ca5dd65594f Pull in some supplemental data from the CLDR, for things like the first day of the week.
cmlenz
parents: 3
diff changeset
339
3
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
340 def date_formats(self):
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
341 return self._data['date_formats']
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
342 date_formats = property(date_formats, doc="""\
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
343 Locale patterns for date formatting.
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
344
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
345 >>> Locale('en', 'US').date_formats['short']
14
29ef15a6fd75 * Removed pkg_resources/setuptools requirement from various places.
cmlenz
parents: 11
diff changeset
346 <DateTimePattern u'M/d/yy'>
3
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
347 >>> Locale('fr', 'FR').date_formats['long']
14
29ef15a6fd75 * Removed pkg_resources/setuptools requirement from various places.
cmlenz
parents: 11
diff changeset
348 <DateTimePattern u'd MMMM yyyy'>
3
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
349
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
350 :type: `dict`
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
351 """)
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
352
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
353 def time_formats(self):
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
354 return self._data['time_formats']
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
355 time_formats = property(time_formats, doc="""\
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
356 Locale patterns for time formatting.
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
357
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
358 >>> Locale('en', 'US').time_formats['short']
14
29ef15a6fd75 * Removed pkg_resources/setuptools requirement from various places.
cmlenz
parents: 11
diff changeset
359 <DateTimePattern u'h:mm a'>
3
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
360 >>> Locale('fr', 'FR').time_formats['long']
14
29ef15a6fd75 * Removed pkg_resources/setuptools requirement from various places.
cmlenz
parents: 11
diff changeset
361 <DateTimePattern u'HH:mm:ss z'>
11
11f64b232b04 Add basic support for number format patterns.
jonas
parents: 10
diff changeset
362
11f64b232b04 Add basic support for number format patterns.
jonas
parents: 10
diff changeset
363 :type: `dict`
11f64b232b04 Add basic support for number format patterns.
jonas
parents: 10
diff changeset
364 """)
11f64b232b04 Add basic support for number format patterns.
jonas
parents: 10
diff changeset
365
3
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
366
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
367 def negotiate(preferred, available):
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
368 """Find the best match between available and requested locale strings.
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
369
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
370 >>> negotiate(['de_DE', 'en_US'], ['de_DE', 'de_AT'])
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
371 'de_DE'
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
372 >>> negotiate(['de_DE', 'en_US'], ['en', 'de'])
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
373 'de'
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
374
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
375 :param preferred: the list of locale strings preferred by the user
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
376 :param available: the list of locale strings available
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
377 :return: the locale identifier for the best match, or `None` if no match
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
378 was found
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
379 :rtype: `str`
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
380 """
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
381 for locale in preferred:
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
382 if locale in available:
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
383 return locale
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
384 parts = locale.split('_')
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
385 if len(parts) > 1 and parts[0] in available:
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
386 return parts[0]
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
387 return None
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
388
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
389 def parse(identifier, sep='_'):
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
390 """Parse a locale identifier into a ``(language, territory, variant)``
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
391 tuple.
e9eaddab598e Import of initial code base.
cmlenz
parents:
diff changeset
392
e9eaddab598e Import of initial code base.
cmlenz
parents:
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393 >>> parse('zh_CN')
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394 ('zh', 'CN', None)
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395
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396 The default component separator is "_", but a different separator can be
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397 specified using the `sep` parameter:
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398
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399 >>> parse('zh-CN', sep='-')
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400 ('zh', 'CN', None)
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401
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402 :param identifier: the locale identifier string
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403 :param sep: character that separates the different parts of the locale
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404 string
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405 :return: the ``(language, territory, variant)`` tuple
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406 :rtype: `tuple`
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407 :raise `ValueError`: if the string does not appear to be a valid locale
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408 identifier
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409
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410 :see: `IETF RFC 3066 <http://www.ietf.org/rfc/rfc3066.txt>`_
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411 """
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412 parts = identifier.split(sep)
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413 lang, territory, variant = parts[0].lower(), None, None
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414 if not lang.isalpha():
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415 raise ValueError('expected only letters, got %r' % lang)
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416 if len(parts) > 1:
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417 territory = parts[1].upper().split('.', 1)[0]
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418 if not territory.isalpha():
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419 raise ValueError('expected only letters, got %r' % territory)
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420 if len(parts) > 2:
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421 variant = parts[2].upper().split('.', 1)[0]
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422 return lang, territory, variant
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