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annotate babel/messages/catalog.py @ 86:8a703ecdba91

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Some cosmetic changes for the new translator comments support.
author cmlenz
date Sun, 10 Jun 2007 18:03:46 +0000
parents f421e5576d26
children 31519c52c0fe
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=(), comments=()):
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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 :param comments: a sequence of translator comments for the message
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48 """
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49 self.id = id
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50 if not string and self.pluralizable:
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51 string = (u'', u'')
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52 self.string = string
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53 self.locations = list(locations)
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54 self.flags = set(flags)
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55 if id and self.python_format:
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56 self.flags.add('python-format')
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57 else:
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58 self.flags.discard('python-format')
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59 self.comments = list(comments)
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60
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61 def __repr__(self):
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62 return '<%s %r>' % (type(self).__name__, self.id)
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63
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64 def fuzzy(self):
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65 return 'fuzzy' in self.flags
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66 fuzzy = property(fuzzy, doc="""\
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67 Whether the translation is fuzzy.
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68
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69 >>> Message('foo').fuzzy
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70 False
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71 >>> Message('foo', 'foo', flags=['fuzzy']).fuzzy
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72 True
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73
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74 :type: `bool`
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75 """)
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76
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77 def pluralizable(self):
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78 return isinstance(self.id, (list, tuple))
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79 pluralizable = property(pluralizable, doc="""\
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80 Whether the message is plurizable.
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81
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82 >>> Message('foo').pluralizable
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83 False
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84 >>> Message(('foo', 'bar')).pluralizable
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85 True
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86
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87 :type: `bool`
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88 """)
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89
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90 def python_format(self):
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91 ids = self.id
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92 if not isinstance(ids, (list, tuple)):
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93 ids = [ids]
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94 return bool(filter(None, [PYTHON_FORMAT(id) for id in ids]))
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95 python_format = property(python_format, doc="""\
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96 Whether the message contains Python-style parameters.
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97
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98 >>> Message('foo %(name)s bar').python_format
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99 True
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100 >>> Message(('foo %(name)s', 'foo %(name)s')).python_format
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101 True
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102
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103 :type: `bool`
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104 """)
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105
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106
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107 class Catalog(object):
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108 """Representation of a message catalog."""
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109
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110 def __init__(self, locale=None, domain=None, project=None, version=None,
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111 msgid_bugs_address=None, creation_date=None,
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112 revision_date=None, last_translator=None, charset='utf-8'):
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113 """Initialize the catalog object.
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114
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115 :param locale: the locale identifier or `Locale` object, or `None`
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116 if the catalog is not bound to a locale (which basically
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117 means it's a template)
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118 :param domain: the message domain
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119 :param project: the project's name
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120 :param version: the project's version
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121 :param msgid_bugs_address: the address to report bugs about the catalog
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122 :param creation_date: the date the catalog was created
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123 :param revision_date: the date the catalog was revised
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124 :param last_translator: the name and email of the last translator
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125 """
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126 self.domain = domain #: the message domain
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127 if locale:
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128 locale = Locale.parse(locale)
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129 self.locale = locale #: the locale or `None`
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130 self._messages = odict()
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131
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132 self.project = project or 'PROJECT' #: the project name
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133 self.version = version or 'VERSION' #: the project version
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134 self.msgid_bugs_address = msgid_bugs_address or 'EMAIL@ADDRESS'
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135
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136 if creation_date is None:
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137 creation_date = time.localtime()
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138 elif isinstance(creation_date, datetime):
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139 if creation_date.tzinfo is None:
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140 creation_date = creation_date.replace(tzinfo=UTC)
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141 creation_date = creation_date.timetuple()
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142 self.creation_date = creation_date #: creation date of the template
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143 if revision_date is None:
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144 revision_date = time.localtime()
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145 elif isinstance(revision_date, datetime):
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146 if revision_date.tzinfo is None:
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147 revision_date = revision_date.replace(tzinfo=UTC)
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148 revision_date = revision_date.timetuple()
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149 self.revision_date = revision_date #: last revision date of the catalog
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150 self.last_translator = last_translator #: last translator name + email
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151 self.charset = charset or 'utf-8'
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152
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153 def headers(self):
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154 headers = []
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155 headers.append(('Project-Id-Version',
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156 '%s %s' % (self.project, self.version)))
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157 headers.append(('Report-Msgid-Bugs-To', self.msgid_bugs_address))
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158 headers.append(('POT-Creation-Date',
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159 time.strftime('%Y-%m-%d %H:%M%z', self.creation_date)))
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160 if self.locale is None:
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161 headers.append(('PO-Revision-Date', 'YEAR-MO-DA HO:MI+ZONE'))
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162 headers.append(('Last-Translator', 'FULL NAME <EMAIL@ADDRESS>'))
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163 headers.append(('Language-Team', 'LANGUAGE <LL@li.org>'))
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164 else:
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165 headers.append(('PO-Revision-Date',
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166 time.strftime('%Y-%m-%d %H:%M%z', self.revision_date)))
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167 headers.append(('Last-Translator', self.last_translator))
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168 headers.append(('Language-Team', '%s <LL@li.org>' % self.locale))
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169 headers.append(('Plural-Forms', self.plural_forms))
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170 headers.append(('MIME-Version', '1.0'))
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171 headers.append(('Content-Type',
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172 'text/plain; charset=%s' % self.charset))
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173 headers.append(('Content-Transfer-Encoding', '8bit'))
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174 headers.append(('Generated-By', 'Babel %s' % VERSION))
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175 return headers
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176 headers = property(headers, doc="""\
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177 The MIME headers of the catalog, used for the special ``msgid ""`` entry.
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178
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179 The behavior of this property changes slightly depending on whether a locale
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180 is set or not, the latter indicating that the catalog is actually a template
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181 for actual translations.
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182
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183 Here's an example of the output for such a catalog template:
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184
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185 >>> catalog = Catalog(project='Foobar', version='1.0',
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186 ... creation_date=datetime(1990, 4, 1, 15, 30))
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187 >>> for name, value in catalog.headers:
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188 ... print '%s: %s' % (name, value)
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189 Project-Id-Version: Foobar 1.0
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190 Report-Msgid-Bugs-To: EMAIL@ADDRESS
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191 POT-Creation-Date: 1990-04-01 15:30+0000
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192 PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE
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193 Last-Translator: FULL NAME <EMAIL@ADDRESS>
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194 Language-Team: LANGUAGE <LL@li.org>
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195 MIME-Version: 1.0
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196 Content-Type: text/plain; charset=utf-8
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197 Content-Transfer-Encoding: 8bit
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198 Generated-By: Babel ...
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199
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200 And here's an example of the output when the locale is set:
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201
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202 >>> catalog = Catalog(locale='de_DE', project='Foobar', version='1.0',
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203 ... creation_date=datetime(1990, 4, 1, 15, 30),
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204 ... revision_date=datetime(1990, 8, 3, 12, 0),
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205 ... last_translator='John Doe <jd@example.com>')
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206 >>> for name, value in catalog.headers:
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207 ... print '%s: %s' % (name, value)
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208 Project-Id-Version: Foobar 1.0
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209 Report-Msgid-Bugs-To: EMAIL@ADDRESS
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210 POT-Creation-Date: 1990-04-01 15:30+0000
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211 PO-Revision-Date: 1990-08-03 12:00+0000
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212 Last-Translator: John Doe <jd@example.com>
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213 Language-Team: de_DE <LL@li.org>
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214 Plural-Forms: nplurals=2; plural=(n != 1)
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215 MIME-Version: 1.0
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216 Content-Type: text/plain; charset=utf-8
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217 Content-Transfer-Encoding: 8bit
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218 Generated-By: Babel ...
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219
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220 :type: `list`
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221 """)
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222
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223 def num_plurals(self):
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224 num = 2
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225 if self.locale:
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226 if str(self.locale) in PLURALS:
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227 num = PLURALS[str(self.locale)][0]
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228 elif self.locale.language in PLURALS:
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229 num = PLURALS[self.locale.language][0]
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230 return num
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231 num_plurals = property(num_plurals, doc="""\
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232 The number of plurals used by the locale.
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233 """)
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234
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235 def plural_forms(self):
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236 num, expr = ('INTEGER', 'EXPRESSION')
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237 if self.locale:
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238 if str(self.locale) in PLURALS:
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239 num, expr = PLURALS[str(self.locale)]
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240 elif self.locale.language in PLURALS:
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241 num, expr = PLURALS[self.locale.language]
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242 return 'nplurals=%s; plural=%s' % (num, expr)
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243 plural_forms = property(plural_forms, doc="""\
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244 Return the plural forms declaration for the locale.
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245
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246 >>> Catalog(locale='en_US').plural_forms
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247 'nplurals=2; plural=(n != 1)'
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248 >>> Catalog(locale='pt_BR').plural_forms
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249 'nplurals=2; plural=(n > 1)'
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250
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251 :type: `str`
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252 """)
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253
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254 def __contains__(self, id):
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255 """Return whether the catalog has a message with the specified ID."""
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256 return self._key_for(id) in self._messages
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257
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258 def __len__(self):
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259 """The number of messages in the catalog.
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260
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261 This does not include the special ``msgid ""`` entry.
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262 """
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263 return len(self._messages)
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264
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265 def __iter__(self):
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266 """Iterates through all the entries in the catalog, in the order they
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267 were added, yielding a `Message` object for every entry.
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268
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269 :rtype: ``iterator``
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270 """
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271 buf = []
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272 for name, value in self.headers:
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273 buf.append('%s: %s' % (name, value))
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274 yield Message('', '\n'.join(buf), flags=set(['fuzzy']))
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275 for key in self._messages:
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276 yield self._messages[key]
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277
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278 def __repr__(self):
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279 locale = ''
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280 if self.locale:
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281 locale = ' %s' % self.locale
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282 return '<%s %r%s>' % (type(self).__name__, self.domain, locale)
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283
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284 def __delitem__(self, id):
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285 """Delete the message with the specified ID."""
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286 key = self._key_for(id)
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287 if key in self._messages:
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288 del self._messages[key]
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289
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290 def __getitem__(self, id):
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291 """Return the message with the specified ID.
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292
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293 :param id: the message ID
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294 :return: the message with the specified ID, or `None` if no such message
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295 is in the catalog
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296 :rtype: `Message`
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297 """
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298 return self._messages.get(self._key_for(id))
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299
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300 def __setitem__(self, id, message):
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301 """Add or update the message with the specified ID.
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302
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303 >>> catalog = Catalog()
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304 >>> catalog[u'foo'] = Message(u'foo')
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305 >>> catalog[u'foo']
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306 <Message u'foo'>
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307
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308 If a message with that ID is already in the catalog, it is updated
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309 to include the locations and flags of the new message.
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310
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311 >>> catalog = Catalog()
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312 >>> catalog[u'foo'] = Message(u'foo', locations=[('main.py', 1)])
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313 >>> catalog[u'foo'].locations
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314 [('main.py', 1)]
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315 >>> catalog[u'foo'] = Message(u'foo', locations=[('utils.py', 5)])
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316 >>> catalog[u'foo'].locations
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317 [('main.py', 1), ('utils.py', 5)]
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318
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319 :param id: the message ID
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320 :param message: the `Message` object
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321 """
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322 assert isinstance(message, Message), 'expected a Message object'
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323 key = self._key_for(id)
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324 current = self._messages.get(key)
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325 if current:
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326 if message.pluralizable and not current.pluralizable:
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327 # The new message adds pluralization
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328 current.id = message.id
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329 current.string = message.string
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330 current.locations.extend(message.locations)
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331 current.flags |= message.flags
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332 message = current
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333 else:
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334 if isinstance(id, (list, tuple)):
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335 assert isinstance(message.string, (list, tuple))
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336 self._messages[key] = message
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337
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338 def add(self, id, string=None, locations=(), flags=(), comments=()):
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339 """Add or update the message with the specified ID.
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340
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341 >>> catalog = Catalog()
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342 >>> catalog.add(u'foo')
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343 >>> catalog[u'foo']
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344 <Message u'foo'>
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345
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346 This method simply constructs a `Message` object with the given
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347 arguments and invokes `__setitem__` with that object.
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348
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349 :param id: the message ID, or a ``(singular, plural)`` tuple for
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350 pluralizable messages
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351 :param string: the translated message string, or a
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352 ``(singular, plural)`` tuple for pluralizable messages
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353 :param locations: a sequence of ``(filenname, lineno)`` tuples
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354 :param flags: a set or sequence of flags
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355 :param comments: a list of translator comments
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356 """
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357 self[id] = Message(id, string, list(locations), flags, comments)
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358
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359 def _key_for(self, id):
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360 """The key for a message is just the singular ID even for pluralizable
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361 messages.
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362 """
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363 key = id
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364 if isinstance(key, (list, tuple)):
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365 key = id[0]
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366 return key
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