Mercurial > babel > old > mirror
annotate babel/messages/catalog.py @ 183:e927dffc9ab4
The frontends now provide ways to update existing translations catalogs from a template. Closes #22.
author | cmlenz |
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date | Thu, 28 Jun 2007 10:28:25 +0000 |
parents | 47f6c31e9a24 |
children | f5780e72eefc |
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 cgi import parse_header |
69 | 17 from datetime import datetime |
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18 from difflib import get_close_matches |
108
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19 from email import message_from_string |
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20 import re |
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21 try: |
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22 set |
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23 except NameError: |
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24 from sets import Set as set |
69 | 25 import time |
58
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26 |
69 | 27 from babel import __version__ as VERSION |
66 | 28 from babel.core import Locale |
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29 from babel.dates import format_datetime |
69 | 30 from babel.messages.plurals import PLURALS |
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31 from babel.util import odict, LOCALTZ, UTC, FixedOffsetTimezone |
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32 |
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33 __all__ = ['Message', 'Catalog'] |
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34 __docformat__ = 'restructuredtext en' |
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35 |
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36 PYTHON_FORMAT = re.compile(r'\%(\([\w]+\))?[diouxXeEfFgGcrs]').search |
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37 |
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38 |
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39 class Message(object): |
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40 """Representation of a single message in a catalog.""" |
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41 |
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42 def __init__(self, id, string=u'', locations=(), flags=(), auto_comments=(), |
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43 user_comments=()): |
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44 """Create the message object. |
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45 |
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46 :param id: the message ID, or a ``(singular, plural)`` tuple for |
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47 pluralizable messages |
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48 :param string: the translated message string, or a |
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49 ``(singular, plural)`` tuple for pluralizable messages |
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50 :param locations: a sequence of ``(filenname, lineno)`` tuples |
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51 :param flags: a set or sequence of flags |
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52 :param auto_comments: a sequence of automatic comments for the message |
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53 :param user_comments: a sequence of user comments for the message |
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54 """ |
109 | 55 self.id = id #: The message ID |
70 | 56 if not string and self.pluralizable: |
57 string = (u'', u'') | |
109 | 58 self.string = string #: The message translation |
72
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59 self.locations = list(locations) |
58
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60 self.flags = set(flags) |
69 | 61 if id and self.python_format: |
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62 self.flags.add('python-format') |
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63 else: |
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64 self.flags.discard('python-format') |
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65 self.auto_comments = list(auto_comments) |
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66 self.user_comments = list(user_comments) |
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67 |
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68 def __repr__(self): |
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69 return '<%s %r (Flags: %r)>' % (type(self).__name__, self.id, |
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70 ', '.join([flag for flag in self.flags])) |
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71 |
69 | 72 def fuzzy(self): |
73 return 'fuzzy' in self.flags | |
74 fuzzy = property(fuzzy, doc="""\ | |
75 Whether the translation is fuzzy. | |
76 | |
77 >>> Message('foo').fuzzy | |
78 False | |
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79 >>> msg = Message('foo', 'foo', flags=['fuzzy']) |
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80 >>> msg.fuzzy |
69 | 81 True |
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82 >>> msg |
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83 <Message 'foo' (Flags: 'fuzzy')> |
69 | 84 |
85 :type: `bool` | |
86 """) | |
87 | |
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88 def pluralizable(self): |
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89 return isinstance(self.id, (list, tuple)) |
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90 pluralizable = property(pluralizable, doc="""\ |
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91 Whether the message is plurizable. |
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92 |
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93 >>> Message('foo').pluralizable |
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94 False |
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95 >>> Message(('foo', 'bar')).pluralizable |
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96 True |
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97 |
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98 :type: `bool` |
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99 """) |
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100 |
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101 def python_format(self): |
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102 ids = self.id |
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103 if not isinstance(ids, (list, tuple)): |
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104 ids = [ids] |
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105 return bool(filter(None, [PYTHON_FORMAT(id) for id in ids])) |
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106 python_format = property(python_format, doc="""\ |
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107 Whether the message contains Python-style parameters. |
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108 |
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109 >>> Message('foo %(name)s bar').python_format |
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110 True |
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111 >>> Message(('foo %(name)s', 'foo %(name)s')).python_format |
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112 True |
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113 |
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114 :type: `bool` |
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115 """) |
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116 |
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117 |
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118 DEFAULT_HEADER = u"""\ |
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119 # Translations template for PROJECT. |
122 | 120 # Copyright (C) YEAR ORGANIZATION |
106
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121 # This file is distributed under the same license as the PROJECT project. |
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122 # FIRST AUTHOR <EMAIL@ADDRESS>, YEAR. |
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123 #""" |
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124 |
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125 class Catalog(object): |
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126 """Representation of a message catalog.""" |
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127 |
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128 def __init__(self, locale=None, domain=None, header_comment=DEFAULT_HEADER, |
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129 project=None, version=None, copyright_holder=None, |
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130 msgid_bugs_address=None, creation_date=None, |
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131 revision_date=None, last_translator=None, charset='utf-8', |
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132 fuzzy=True): |
66 | 133 """Initialize the catalog object. |
134 | |
135 :param locale: the locale identifier or `Locale` object, or `None` | |
136 if the catalog is not bound to a locale (which basically | |
137 means it's a template) | |
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138 :param domain: the message domain |
106
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139 :param header_comment: the header comment as string, or `None` for the |
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140 default header |
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141 :param project: the project's name |
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142 :param version: the project's version |
106
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143 :param copyright_holder: the copyright holder of the catalog |
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144 :param msgid_bugs_address: the email address or URL to submit bug |
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145 reports to |
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146 :param creation_date: the date the catalog was created |
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147 :param revision_date: the date the catalog was revised |
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148 :param last_translator: the name and email of the last translator |
106
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149 :param charset: the encoding to use in the output |
177
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150 :param fuzzy: the fuzzy bit on the catalog header |
66 | 151 """ |
109 | 152 self.domain = domain #: The message domain |
66 | 153 if locale: |
154 locale = Locale.parse(locale) | |
109 | 155 self.locale = locale #: The locale or `None` |
106
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156 self._header_comment = header_comment |
69 | 157 self._messages = odict() |
158 | |
109 | 159 self.project = project or 'PROJECT' #: The project name |
160 self.version = version or 'VERSION' #: The project version | |
106
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161 self.copyright_holder = copyright_holder or 'ORGANIZATION' |
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162 self.msgid_bugs_address = msgid_bugs_address or 'EMAIL@ADDRESS' |
108
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163 |
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164 self.last_translator = last_translator or 'FULL NAME <EMAIL@ADDRESS>' |
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165 """Name and email address of the last translator.""" |
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166 |
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167 self.charset = charset or 'utf-8' |
86
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168 |
69 | 169 if creation_date is None: |
99 | 170 creation_date = datetime.now(LOCALTZ) |
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171 elif isinstance(creation_date, datetime) and not creation_date.tzinfo: |
99 | 172 creation_date = creation_date.replace(tzinfo=LOCALTZ) |
109 | 173 self.creation_date = creation_date #: Creation date of the template |
69 | 174 if revision_date is None: |
99 | 175 revision_date = datetime.now(LOCALTZ) |
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176 elif isinstance(revision_date, datetime) and not revision_date.tzinfo: |
99 | 177 revision_date = revision_date.replace(tzinfo=LOCALTZ) |
109 | 178 self.revision_date = revision_date #: Last revision date of the catalog |
183
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179 self.fuzzy = fuzzy #: Catalog header fuzzy bit (`True` or `False`) |
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180 |
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181 self.obsolete = odict() #: Dictionary of obsolete messages |
69 | 182 |
109 | 183 def _get_header_comment(self): |
106
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184 comment = self._header_comment |
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185 comment = comment.replace('PROJECT', self.project) \ |
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186 .replace('VERSION', self.version) \ |
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187 .replace('YEAR', self.revision_date.strftime('%Y')) \ |
122 | 188 .replace('ORGANIZATION', self.copyright_holder) |
106
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189 if self.locale: |
109 | 190 comment = comment.replace('Translations template', '%s translations' |
191 % self.locale.english_name) | |
106
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192 return comment |
122 | 193 |
109 | 194 def _set_header_comment(self, string): |
106
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195 self._header_comment = string |
109 | 196 |
197 header_comment = property(_get_header_comment, _set_header_comment, doc="""\ | |
106
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198 The header comment for the catalog. |
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199 |
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200 >>> catalog = Catalog(project='Foobar', version='1.0', |
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201 ... copyright_holder='Foo Company') |
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202 >>> print catalog.header_comment |
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203 # Translations template for Foobar. |
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204 # Copyright (C) 2007 Foo Company |
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205 # This file is distributed under the same license as the Foobar project. |
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206 # FIRST AUTHOR <EMAIL@ADDRESS>, 2007. |
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207 # |
108
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208 |
122 | 209 The header can also be set from a string. Any known upper-case variables |
210 will be replaced when the header is retrieved again: | |
211 | |
212 >>> catalog = Catalog(project='Foobar', version='1.0', | |
213 ... copyright_holder='Foo Company') | |
214 >>> catalog.header_comment = '''\\ | |
215 ... # The POT for my really cool PROJECT project. | |
216 ... # Copyright (C) 1990-2003 ORGANIZATION | |
217 ... # This file is distributed under the same license as the PROJECT | |
218 ... # project. | |
219 ... #''' | |
220 >>> print catalog.header_comment | |
221 # The POT for my really cool Foobar project. | |
222 # Copyright (C) 1990-2003 Foo Company | |
223 # This file is distributed under the same license as the Foobar | |
224 # project. | |
225 # | |
226 | |
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227 :type: `unicode` |
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228 """) |
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229 |
108
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230 def _get_mime_headers(self): |
69 | 231 headers = [] |
232 headers.append(('Project-Id-Version', | |
233 '%s %s' % (self.project, self.version))) | |
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234 headers.append(('Report-Msgid-Bugs-To', self.msgid_bugs_address)) |
69 | 235 headers.append(('POT-Creation-Date', |
133
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236 format_datetime(self.creation_date, 'yyyy-MM-dd HH:mmZ', |
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237 locale='en'))) |
69 | 238 if self.locale is None: |
239 headers.append(('PO-Revision-Date', 'YEAR-MO-DA HO:MI+ZONE')) | |
240 headers.append(('Last-Translator', 'FULL NAME <EMAIL@ADDRESS>')) | |
241 headers.append(('Language-Team', 'LANGUAGE <LL@li.org>')) | |
242 else: | |
243 headers.append(('PO-Revision-Date', | |
133
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244 format_datetime(self.revision_date, |
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245 'yyyy-MM-dd HH:mmZ', locale='en'))) |
69 | 246 headers.append(('Last-Translator', self.last_translator)) |
247 headers.append(('Language-Team', '%s <LL@li.org>' % self.locale)) | |
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248 headers.append(('Plural-Forms', self.plural_forms)) |
69 | 249 headers.append(('MIME-Version', '1.0')) |
70 | 250 headers.append(('Content-Type', |
251 'text/plain; charset=%s' % self.charset)) | |
69 | 252 headers.append(('Content-Transfer-Encoding', '8bit')) |
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253 headers.append(('Generated-By', 'Babel %s\n' % VERSION)) |
69 | 254 return headers |
108
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255 |
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256 def _set_mime_headers(self, headers): |
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257 for name, value in headers: |
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258 name = name.lower() |
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259 if name == 'project-id-version': |
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260 parts = value.split(' ') |
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261 self.project = ' '.join(parts[:-1]) |
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262 self.version = parts[-1] |
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263 elif name == 'report-msgid-bugs-to': |
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264 self.msgid_bugs_address = value |
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265 elif name == 'last-translator': |
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266 self.last_translator = value |
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267 elif name == 'pot-creation-date': |
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268 # FIXME: this should use dates.parse_datetime as soon as that |
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269 # is ready |
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270 value, tzoffset, _ = re.split('[+-](\d{4})$', value, 1) |
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271 tt = time.strptime(value, '%Y-%m-%d %H:%M') |
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272 ts = time.mktime(tt) |
122 | 273 tzoffset = FixedOffsetTimezone(int(tzoffset[:2]) * 60 + |
274 int(tzoffset[2:])) | |
123 | 275 dt = datetime.fromtimestamp(ts) |
276 self.creation_date = dt.replace(tzinfo=tzoffset) | |
151
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277 elif name == 'content-type': |
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278 mimetype, params = parse_header(value) |
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279 if 'charset' in params: |
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280 self.charset = params['charset'].lower() |
108
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281 |
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282 mime_headers = property(_get_mime_headers, _set_mime_headers, doc="""\ |
69 | 283 The MIME headers of the catalog, used for the special ``msgid ""`` entry. |
284 | |
285 The behavior of this property changes slightly depending on whether a locale | |
286 is set or not, the latter indicating that the catalog is actually a template | |
287 for actual translations. | |
288 | |
289 Here's an example of the output for such a catalog template: | |
290 | |
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291 >>> created = datetime(1990, 4, 1, 15, 30, tzinfo=UTC) |
69 | 292 >>> catalog = Catalog(project='Foobar', version='1.0', |
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293 ... creation_date=created) |
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294 >>> for name, value in catalog.mime_headers: |
69 | 295 ... print '%s: %s' % (name, value) |
296 Project-Id-Version: Foobar 1.0 | |
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297 Report-Msgid-Bugs-To: EMAIL@ADDRESS |
69 | 298 POT-Creation-Date: 1990-04-01 15:30+0000 |
299 PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE | |
300 Last-Translator: FULL NAME <EMAIL@ADDRESS> | |
301 Language-Team: LANGUAGE <LL@li.org> | |
302 MIME-Version: 1.0 | |
303 Content-Type: text/plain; charset=utf-8 | |
304 Content-Transfer-Encoding: 8bit | |
305 Generated-By: Babel ... | |
306 | |
307 And here's an example of the output when the locale is set: | |
308 | |
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309 >>> revised = datetime(1990, 8, 3, 12, 0, tzinfo=UTC) |
69 | 310 >>> catalog = Catalog(locale='de_DE', project='Foobar', version='1.0', |
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311 ... creation_date=created, revision_date=revised, |
69 | 312 ... last_translator='John Doe <jd@example.com>') |
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313 >>> for name, value in catalog.mime_headers: |
69 | 314 ... print '%s: %s' % (name, value) |
315 Project-Id-Version: Foobar 1.0 | |
80
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316 Report-Msgid-Bugs-To: EMAIL@ADDRESS |
69 | 317 POT-Creation-Date: 1990-04-01 15:30+0000 |
318 PO-Revision-Date: 1990-08-03 12:00+0000 | |
319 Last-Translator: John Doe <jd@example.com> | |
320 Language-Team: de_DE <LL@li.org> | |
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321 Plural-Forms: nplurals=2; plural=(n != 1) |
69 | 322 MIME-Version: 1.0 |
323 Content-Type: text/plain; charset=utf-8 | |
324 Content-Transfer-Encoding: 8bit | |
325 Generated-By: Babel ... | |
326 | |
327 :type: `list` | |
328 """) | |
329 | |
70 | 330 def num_plurals(self): |
331 num = 2 | |
332 if self.locale: | |
333 if str(self.locale) in PLURALS: | |
334 num = PLURALS[str(self.locale)][0] | |
335 elif self.locale.language in PLURALS: | |
336 num = PLURALS[self.locale.language][0] | |
337 return num | |
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338 num_plurals = property(num_plurals, doc="""\ |
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339 The number of plurals used by the locale. |
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340 |
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341 >>> Catalog(locale='en').num_plurals |
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342 2 |
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343 >>> Catalog(locale='cs_CZ').num_plurals |
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344 3 |
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345 |
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346 :type: `int` |
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347 """) |
70 | 348 |
69 | 349 def plural_forms(self): |
350 num, expr = ('INTEGER', 'EXPRESSION') | |
351 if self.locale: | |
352 if str(self.locale) in PLURALS: | |
353 num, expr = PLURALS[str(self.locale)] | |
354 elif self.locale.language in PLURALS: | |
355 num, expr = PLURALS[self.locale.language] | |
356 return 'nplurals=%s; plural=%s' % (num, expr) | |
357 plural_forms = property(plural_forms, doc="""\ | |
358 Return the plural forms declaration for the locale. | |
359 | |
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360 >>> Catalog(locale='en').plural_forms |
69 | 361 'nplurals=2; plural=(n != 1)' |
362 >>> Catalog(locale='pt_BR').plural_forms | |
363 'nplurals=2; plural=(n > 1)' | |
364 | |
365 :type: `str` | |
366 """) | |
367 | |
368 def __contains__(self, id): | |
369 """Return whether the catalog has a message with the specified ID.""" | |
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370 return self._key_for(id) in self._messages |
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371 |
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372 def __len__(self): |
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373 """The number of messages in the catalog. |
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374 |
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375 This does not include the special ``msgid ""`` entry. |
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376 """ |
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377 return len(self._messages) |
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378 |
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379 def __iter__(self): |
66 | 380 """Iterates through all the entries in the catalog, in the order they |
381 were added, yielding a `Message` object for every entry. | |
382 | |
383 :rtype: ``iterator`` | |
384 """ | |
69 | 385 buf = [] |
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386 for name, value in self.mime_headers: |
69 | 387 buf.append('%s: %s' % (name, value)) |
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388 if self.fuzzy: |
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389 flags = set(['fuzzy']) |
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390 else: |
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391 flags = set() |
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392 yield Message('', '\n'.join(buf), flags=flags) |
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393 for key in self._messages: |
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394 yield self._messages[key] |
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395 |
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396 def __repr__(self): |
66 | 397 locale = '' |
398 if self.locale: | |
399 locale = ' %s' % self.locale | |
400 return '<%s %r%s>' % (type(self).__name__, self.domain, locale) | |
58
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401 |
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402 def __delitem__(self, id): |
66 | 403 """Delete the message with the specified ID.""" |
71
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404 key = self._key_for(id) |
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405 if key in self._messages: |
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406 del self._messages[key] |
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407 |
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408 def __getitem__(self, id): |
66 | 409 """Return the message with the specified ID. |
410 | |
411 :param id: the message ID | |
412 :return: the message with the specified ID, or `None` if no such message | |
413 is in the catalog | |
69 | 414 :rtype: `Message` |
66 | 415 """ |
71
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416 return self._messages.get(self._key_for(id)) |
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417 |
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418 def __setitem__(self, id, message): |
66 | 419 """Add or update the message with the specified ID. |
420 | |
421 >>> catalog = Catalog() | |
422 >>> catalog[u'foo'] = Message(u'foo') | |
423 >>> catalog[u'foo'] | |
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424 <Message u'foo' (Flags: '')> |
66 | 425 |
426 If a message with that ID is already in the catalog, it is updated | |
427 to include the locations and flags of the new message. | |
428 | |
429 >>> catalog = Catalog() | |
430 >>> catalog[u'foo'] = Message(u'foo', locations=[('main.py', 1)]) | |
431 >>> catalog[u'foo'].locations | |
432 [('main.py', 1)] | |
433 >>> catalog[u'foo'] = Message(u'foo', locations=[('utils.py', 5)]) | |
434 >>> catalog[u'foo'].locations | |
435 [('main.py', 1), ('utils.py', 5)] | |
436 | |
437 :param id: the message ID | |
438 :param message: the `Message` object | |
439 """ | |
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440 assert isinstance(message, Message), 'expected a Message object' |
71
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441 key = self._key_for(id) |
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442 current = self._messages.get(key) |
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443 if current: |
71
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444 if message.pluralizable and not current.pluralizable: |
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445 # The new message adds pluralization |
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446 current.id = message.id |
72
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447 current.string = message.string |
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448 current.locations.extend(message.locations) |
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449 current.auto_comments.extend(message.auto_comments) |
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450 current.user_comments.extend(message.user_comments) |
58
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451 current.flags |= message.flags |
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452 message = current |
108
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453 elif id == '': |
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454 # special treatment for the header message |
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455 headers = message_from_string(message.string.encode(self.charset)) |
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456 self.mime_headers = headers.items() |
122 | 457 self.header_comment = '\n'.join(['# %s' % comment for comment |
458 in message.user_comments]) | |
58
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459 else: |
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460 if isinstance(id, (list, tuple)): |
70 | 461 assert isinstance(message.string, (list, tuple)) |
71
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462 self._messages[key] = message |
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463 |
107
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464 def add(self, id, string=None, locations=(), flags=(), auto_comments=(), |
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465 user_comments=()): |
66 | 466 """Add or update the message with the specified ID. |
467 | |
468 >>> catalog = Catalog() | |
469 >>> catalog.add(u'foo') | |
470 >>> catalog[u'foo'] | |
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471 <Message u'foo' (Flags: '')> |
66 | 472 |
473 This method simply constructs a `Message` object with the given | |
474 arguments and invokes `__setitem__` with that object. | |
475 | |
476 :param id: the message ID, or a ``(singular, plural)`` tuple for | |
477 pluralizable messages | |
478 :param string: the translated message string, or a | |
479 ``(singular, plural)`` tuple for pluralizable messages | |
480 :param locations: a sequence of ``(filenname, lineno)`` tuples | |
481 :param flags: a set or sequence of flags | |
108
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482 :param auto_comments: a sequence of automatic comments |
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483 :param user_comments: a sequence of user comments |
66 | 484 """ |
107
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485 self[id] = Message(id, string, list(locations), flags, auto_comments, |
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486 user_comments) |
71
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487 |
167
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488 def update(self, template, fuzzy_matching=True): |
165
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489 """Update the catalog based on the given template catalog. |
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490 |
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491 >>> from babel.messages import Catalog |
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492 >>> template = Catalog() |
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493 >>> template.add('blue', locations=[('main.py', 100)]) |
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494 >>> template.add(('salad', 'salads'), locations=[('util.py', 42)]) |
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495 >>> catalog = Catalog(locale='de_DE') |
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496 >>> catalog.add('blue', u'blau', locations=[('main.py', 98)]) |
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497 >>> catalog.add('head', u'Kopf', locations=[('util.py', 33)]) |
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498 >>> catalog.add(('salad', 'salads'), (u'Salat', u'Salate'), |
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499 ... locations=[('util.py', 38)]) |
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500 |
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501 >>> catalog.update(template) |
165
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502 >>> len(catalog) |
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503 2 |
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504 |
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505 >>> msg1 = catalog['blue'] |
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506 >>> msg1.string |
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507 u'blau' |
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508 >>> msg1.locations |
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509 [('main.py', 100)] |
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510 |
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511 >>> msg2 = catalog['salad'] |
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512 >>> msg2.string |
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513 (u'Salat', u'Salate') |
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514 >>> msg2.locations |
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515 [('util.py', 42)] |
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516 |
183
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517 Messages that are in the catalog but not in the template are removed |
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518 from the main collection, but can still be accessed via the `obsolete` |
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519 member: |
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520 |
165
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521 >>> 'head' in catalog |
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522 False |
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523 >>> catalog.obsolete.values() |
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524 [<Message 'head' (Flags: '')>] |
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525 |
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526 :param template: the reference catalog, usually read from a POT file |
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527 :param fuzzy_matching: whether to use fuzzy matching of message IDs |
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528 """ |
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529 messages = self._messages |
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530 self._messages = odict() |
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531 |
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532 for message in template: |
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533 if message.id: |
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534 key = self._key_for(message.id) |
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535 if key in messages: |
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536 oldmsg = messages.pop(key) |
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537 message.string = oldmsg.string |
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538 message.flags |= oldmsg.flags |
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539 self[message.id] = message |
167
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540 |
165
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541 else: |
167
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542 if fuzzy_matching: |
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543 # do some fuzzy matching with difflib |
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544 matches = get_close_matches(key.lower().strip(), |
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545 [self._key_for(msgid) for msgid in messages], 1) |
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546 if matches: |
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547 oldmsg = messages.pop(matches[0]) |
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548 message.string = oldmsg.string |
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549 message.flags |= oldmsg.flags | set([u'fuzzy']) |
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550 self[message.id] = message |
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551 continue |
165
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552 |
167
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553 self[message.id] = message |
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554 |
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555 self.obsolete = messages |
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556 |
71
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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.
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557 def _key_for(self, id): |
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558 """The key for a message is just the singular ID even for pluralizable |
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559 messages. |
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560 """ |
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561 key = id |
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562 if isinstance(key, (list, tuple)): |
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563 key = id[0] |
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564 return key |