Mercurial > babel > old > babel-test

annotate babel/messages/catalog.py @ 69:9b8079807245

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Message catalogs can have multiple messages with the same ID, where some of them have plural strings, and others don't. Still the same message.
author cmlenz
date Fri, 08 Jun 2007 16:16:08 +0000
parents 7e64668126d9
children 2b0e18a04856
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
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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 """Data structures for message catalogs."""
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15
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16 from datetime import datetime
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17 import re
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18 try:
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19 set
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20 except NameError:
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21 from sets import Set as set
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22 import time
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23
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24 from babel import __version__ as VERSION
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25 from babel.core import Locale
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26 from babel.messages.plurals import PLURALS
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27 from babel.util import odict, UTC
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28
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29 __all__ = ['Message', 'Catalog']
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30 __docformat__ = 'restructuredtext en'
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31
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32 PYTHON_FORMAT = re.compile(r'\%(\([\w]+\))?[diouxXeEfFgGcrs]').search
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33
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34
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35 class Message(object):
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36 """Representation of a single message in a catalog."""
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37
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38 def __init__(self, id, string='', locations=(), flags=()):
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39 """Create the message object.
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40
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41 :param id: the message ID, or a ``(singular, plural)`` tuple for
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42 pluralizable messages
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43 :param string: the translated message string, or a
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44 ``(singular, plural)`` tuple for pluralizable messages
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45 :param locations: a sequence of ``(filenname, lineno)`` tuples
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46 :param flags: a set or sequence of flags
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47 """
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48 self.id = id
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49 if not string and self.pluralizable:
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50 string = (u'', u'')
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51 self.string = string
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52 self.locations = locations
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53 self.flags = set(flags)
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54 if id and self.python_format:
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55 self.flags.add('python-format')
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56 else:
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57 self.flags.discard('python-format')
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58
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59 def __repr__(self):
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60 return '<%s %r>' % (type(self).__name__, self.id)
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61
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62 def fuzzy(self):
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63 return 'fuzzy' in self.flags
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64 fuzzy = property(fuzzy, doc="""\
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65 Whether the translation is fuzzy.
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66
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67 >>> Message('foo').fuzzy
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68 False
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69 >>> Message('foo', 'foo', flags=['fuzzy']).fuzzy
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70 True
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71
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72 :type: `bool`
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73 """)
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74
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75 def pluralizable(self):
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76 return isinstance(self.id, (list, tuple))
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77 pluralizable = property(pluralizable, doc="""\
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78 Whether the message is plurizable.
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79
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80 >>> Message('foo').pluralizable
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81 False
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82 >>> Message(('foo', 'bar')).pluralizable
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83 True
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84
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85 :type: `bool`
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86 """)
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87
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88 def python_format(self):
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89 ids = self.id
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90 if not isinstance(ids, (list, tuple)):
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91 ids = [ids]
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92 return bool(filter(None, [PYTHON_FORMAT(id) for id in ids]))
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93 python_format = property(python_format, doc="""\
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94 Whether the message contains Python-style parameters.
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95
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96 >>> Message('foo %(name)s bar').python_format
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97 True
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98 >>> Message(('foo %(name)s', 'foo %(name)s')).python_format
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99 True
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100
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101 :type: `bool`
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102 """)
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103
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104
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105 class Catalog(object):
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106 """Representation a message catalog."""
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107
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108 def __init__(self, locale=None, domain=None, project=None, version=None,
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109 creation_date=None, revision_date=None, last_translator=None,
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110 charset='utf-8'):
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111 """Initialize the catalog object.
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112
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113 :param domain: the message domain
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114 :param locale: the locale identifier or `Locale` object, or `None`
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115 if the catalog is not bound to a locale (which basically
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116 means it's a template)
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117 """
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118 self.domain = domain #: the message domain
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119 if locale:
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120 locale = Locale.parse(locale)
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121 self.locale = locale #: the locale or `None`
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122 self._messages = odict()
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123
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124 self.project = project or 'PROJECT' #: the project name
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125 self.version = version or 'VERSION' #: the project version
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126
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127 if creation_date is None:
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128 creation_date = time.localtime()
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129 elif isinstance(creation_date, datetime):
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130 if creation_date.tzinfo is None:
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131 creation_date = creation_date.replace(tzinfo=UTC)
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132 creation_date = creation_date.timetuple()
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133 self.creation_date = creation_date #: creation date of the template
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134 if revision_date is None:
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135 revision_date = time.localtime()
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136 elif isinstance(revision_date, datetime):
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137 if revision_date.tzinfo is None:
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138 revision_date = revision_date.replace(tzinfo=UTC)
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139 revision_date = revision_date.timetuple()
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140 self.revision_date = revision_date #: last revision date of the catalog
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141 self.last_translator = last_translator #: last translator name + email
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142 self.charset = charset or 'utf-8'
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143
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144 def headers(self):
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145 headers = []
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146 headers.append(('Project-Id-Version',
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147 '%s %s' % (self.project, self.version)))
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148 headers.append(('POT-Creation-Date',
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149 time.strftime('%Y-%m-%d %H:%M%z', self.creation_date)))
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150 if self.locale is None:
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151 headers.append(('PO-Revision-Date', 'YEAR-MO-DA HO:MI+ZONE'))
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152 headers.append(('Last-Translator', 'FULL NAME <EMAIL@ADDRESS>'))
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153 headers.append(('Language-Team', 'LANGUAGE <LL@li.org>'))
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154 else:
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155 headers.append(('PO-Revision-Date',
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156 time.strftime('%Y-%m-%d %H:%M%z', self.revision_date)))
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157 headers.append(('Last-Translator', self.last_translator))
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158 headers.append(('Language-Team', '%s <LL@li.org>' % self.locale))
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159 headers.append(('Plural-Forms', self.plural_forms))
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160 headers.append(('MIME-Version', '1.0'))
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161 headers.append(('Content-Type',
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162 'text/plain; charset=%s' % self.charset))
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163 headers.append(('Content-Transfer-Encoding', '8bit'))
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164 headers.append(('Generated-By', 'Babel %s' % VERSION))
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165 return headers
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166 headers = property(headers, doc="""\
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167 The MIME headers of the catalog, used for the special ``msgid ""`` entry.
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168
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169 The behavior of this property changes slightly depending on whether a locale
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170 is set or not, the latter indicating that the catalog is actually a template
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171 for actual translations.
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172
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173 Here's an example of the output for such a catalog template:
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174
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175 >>> catalog = Catalog(project='Foobar', version='1.0',
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176 ... creation_date=datetime(1990, 4, 1, 15, 30))
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177 >>> for name, value in catalog.headers:
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178 ... print '%s: %s' % (name, value)
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179 Project-Id-Version: Foobar 1.0
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180 POT-Creation-Date: 1990-04-01 15:30+0000
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181 PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE
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182 Last-Translator: FULL NAME <EMAIL@ADDRESS>
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183 Language-Team: LANGUAGE <LL@li.org>
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184 Plural-Forms: nplurals=INTEGER; plural=EXPRESSION
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185 MIME-Version: 1.0
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186 Content-Type: text/plain; charset=utf-8
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187 Content-Transfer-Encoding: 8bit
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188 Generated-By: Babel ...
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189
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190 And here's an example of the output when the locale is set:
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191
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192 >>> catalog = Catalog(locale='de_DE', project='Foobar', version='1.0',
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193 ... creation_date=datetime(1990, 4, 1, 15, 30),
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194 ... revision_date=datetime(1990, 8, 3, 12, 0),
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195 ... last_translator='John Doe <jd@example.com>')
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196 >>> for name, value in catalog.headers:
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197 ... print '%s: %s' % (name, value)
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198 Project-Id-Version: Foobar 1.0
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199 POT-Creation-Date: 1990-04-01 15:30+0000
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200 PO-Revision-Date: 1990-08-03 12:00+0000
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201 Last-Translator: John Doe <jd@example.com>
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202 Language-Team: de_DE <LL@li.org>
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203 Plural-Forms: nplurals=2; plural=(n != 1)
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204 MIME-Version: 1.0
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205 Content-Type: text/plain; charset=utf-8
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206 Content-Transfer-Encoding: 8bit
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207 Generated-By: Babel ...
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208
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209 :type: `list`
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210 """)
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211
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212 def num_plurals(self):
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213 num = 2
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214 if self.locale:
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215 if str(self.locale) in PLURALS:
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216 num = PLURALS[str(self.locale)][0]
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217 elif self.locale.language in PLURALS:
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218 num = PLURALS[self.locale.language][0]
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219 return num
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220 num_plurals = property(num_plurals)
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221
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222 def plural_forms(self):
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223 num, expr = ('INTEGER', 'EXPRESSION')
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224 if self.locale:
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225 if str(self.locale) in PLURALS:
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226 num, expr = PLURALS[str(self.locale)]
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227 elif self.locale.language in PLURALS:
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228 num, expr = PLURALS[self.locale.language]
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229 return 'nplurals=%s; plural=%s' % (num, expr)
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230 plural_forms = property(plural_forms, doc="""\
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231 Return the plural forms declaration for the locale.
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232
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233 >>> Catalog(locale='en_US').plural_forms
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234 'nplurals=2; plural=(n != 1)'
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235 >>> Catalog(locale='pt_BR').plural_forms
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236 'nplurals=2; plural=(n > 1)'
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237
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238 :type: `str`
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239 """)
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240
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241 def __contains__(self, id):
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242 """Return whether the catalog has a message with the specified ID."""
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243 return self._key_for(id) in self._messages
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244
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245 def __len__(self):
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246 return len(self._messages)
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247
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248 def __iter__(self):
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249 """Iterates through all the entries in the catalog, in the order they
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250 were added, yielding a `Message` object for every entry.
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251
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252 :rtype: ``iterator``
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253 """
67
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254 buf = []
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255 for name, value in self.headers:
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256 buf.append('%s: %s' % (name, value))
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257 yield Message('', '\n'.join(buf), flags=set(['fuzzy']))
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258 for key in self._messages:
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259 yield self._messages[key]
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260
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261 def __repr__(self):
64
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262 locale = ''
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263 if self.locale:
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264 locale = ' %s' % self.locale
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265 return '<%s %r%s>' % (type(self).__name__, self.domain, locale)
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266
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267 def __delitem__(self, id):
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268 """Delete the message with the specified ID."""
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269 key = self._key_for(id)
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270 if key in self._messages:
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271 del self._messages[key]
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272
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273 def __getitem__(self, id):
64
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274 """Return the message with the specified ID.
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275
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276 :param id: the message ID
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277 :return: the message with the specified ID, or `None` if no such message
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278 is in the catalog
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279 :rtype: `Message`
64
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280 """
69
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281 return self._messages.get(self._key_for(id))
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282
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283 def __setitem__(self, id, message):
64
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284 """Add or update the message with the specified ID.
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285
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286 >>> catalog = Catalog()
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287 >>> catalog[u'foo'] = Message(u'foo')
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288 >>> catalog[u'foo']
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289 <Message u'foo'>
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290
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291 If a message with that ID is already in the catalog, it is updated
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292 to include the locations and flags of the new message.
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293
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294 >>> catalog = Catalog()
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295 >>> catalog[u'foo'] = Message(u'foo', locations=[('main.py', 1)])
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296 >>> catalog[u'foo'].locations
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297 [('main.py', 1)]
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298 >>> catalog[u'foo'] = Message(u'foo', locations=[('utils.py', 5)])
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299 >>> catalog[u'foo'].locations
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300 [('main.py', 1), ('utils.py', 5)]
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301
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302 :param id: the message ID
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303 :param message: the `Message` object
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304 """
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305 assert isinstance(message, Message), 'expected a Message object'
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306 key = self._key_for(id)
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307 current = self._messages.get(key)
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308 if current:
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309 if message.pluralizable and not current.pluralizable:
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310 # The new message adds pluralization
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311 current.id = message.id
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312 current.locations.extend(message.locations)
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313 current.flags |= message.flags
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314 message = current
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315 else:
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316 if isinstance(id, (list, tuple)):
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317 assert isinstance(message.string, (list, tuple))
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318 self._messages[key] = message
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319
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320 def add(self, id, string=None, locations=(), flags=()):
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321 """Add or update the message with the specified ID.
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322
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323 >>> catalog = Catalog()
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324 >>> catalog.add(u'foo')
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325 >>> catalog[u'foo']
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326 <Message u'foo'>
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327
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328 This method simply constructs a `Message` object with the given
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329 arguments and invokes `__setitem__` with that object.
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330
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331 :param id: the message ID, or a ``(singular, plural)`` tuple for
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332 pluralizable messages
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333 :param string: the translated message string, or a
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334 ``(singular, plural)`` tuple for pluralizable messages
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335 :param locations: a sequence of ``(filenname, lineno)`` tuples
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336 :param flags: a set or sequence of flags
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337 """
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338 self[id] = Message(id, string, list(locations), flags)
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339
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340 def _key_for(self, id):
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341 """The key for a message is just the singular ID even for pluralizable
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342 messages.
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343 """
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344 key = id
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345 if isinstance(key, (list, tuple)):
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346 key = id[0]
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347 return key
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