这是我上一个问题的后续内容。
我有一台OSX Mavericks机器，在那里我使用MacPorts安装了Python 2.7和Babel 1.3。问题是，我在那台机器上似乎至少有两个版本的babel，除了我使用MacPort安装的一个之外，另一个没有安装CLDR区域设置数据文件，所以当我在应用程序目录中执行以下命令时：
pybabel extract -o ./locale/messages.pot ./
我收到这个错误消息：
[...]
writing PO template file to ./locale/messages.pot
Traceback (most recent call last):
File "/usr/local/bin/pybabel", line 8, in <module>
load_entry_point('Babel==2.0-dev-20131218', 'console_scripts', 'pybabel')()
File "/Library/Python/2.7/site-packages/Babel-2.0_dev_20131218-py2.7.egg/babel/messages/frontend.py", line 1151, in main
return CommandLineInterface().run(sys.argv)
File "/Library/Python/2.7/site-packages/Babel-2.0_dev_20131218-py2.7.egg/babel/messages/frontend.py", line 665, in run
return getattr(self, cmdname)(args[1:])
File "/Library/Python/2.7/site-packages/Babel-2.0_dev_20131218-py2.7.egg/babel/messages/frontend.py", line 947, in extract
sort_by_file=options.sort_by_file)
File "/Library/Python/2.7/site-packages/Babel-2.0_dev_20131218-py2.7.egg/babel/messages/pofile.py", line 427, in write_po
messages = list(catalog)
File "/Library/Python/2.7/site-packages/Babel-2.0_dev_20131218-py2.7.egg/babel/messages/catalog.py", line 552, in __iter__
for name, value in self.mime_headers:
File "/Library/Python/2.7/site-packages/Babel-2.0_dev_20131218-py2.7.egg/babel/messages/catalog.py", line 337, in _get_mime_headers
locale='en')))
File "/Library/Python/2.7/site-packages/Babel-2.0_dev_20131218-py2.7.egg/babel/dates.py", line 609, in format_datetime
locale = Locale.parse(locale)
File "/Library/Python/2.7/site-packages/Babel-2.0_dev_20131218-py2.7.egg/babel/core.py", line 284, in parse
language = get_global('language_aliases').get(language, language)
File "/Library/Python/2.7/site-packages/Babel-2.0_dev_20131218-py2.7.egg/babel/core.py", line 53, in get_global
_raise_no_data_error()
File "/Library/Python/2.7/site-packages/Babel-2.0_dev_20131218-py2.7.egg/babel/core.py", line 25, in _raise_no_data_error
raise RuntimeError('The babel data files are not available. '
RuntimeError: The babel data files are not available. This usually happens because you are using a source checkout from Babel and you did not build the data files. Just make sure to run "python setup.py import_cldr" before installing the library.
我发现Babel安装在我的机器上的这些位置：
> cd /Library/Python/2.7/site-packages/Babel-2.0_dev_20131218-py2.7.egg/
> ls
EGG-INFO babel
> cd babel
> ls
__init__.py core.py localedata.py numbers.py support.py
__init__.pyc core.pyc localedata.pyc numbers.pyc support.pyc
_compat.py dates.py localtime plural.py util.py
_compat.pyc dates.pyc messages plural.pyc util.pyc
> cd /opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/babel
> ls
__init__.py core.py localedata numbers.py support.py
__init__.pyc core.pyc localedata.py numbers.pyc support.pyc
_compat.py dates.py localedata.pyc plural.py util.py
_compat.pyc dates.pyc localtime plural.pyc util.pyc
global.dat messages
以下是在我的环境中定义的各种路径：
> echo $PATH
/opt/local/bin:/opt/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/local/git/bin:/Users/XXXXX/.rvm/bin
> echo $PYTHONPATH
> echo $DYLD_FALLBACK_LIBRARY_PATH
> echo $DYLD_LIBRARY_PATH
> echo $DYLD_FALLBACK_FRAMEWORK_PATH
> echo $DYLD_FRAMEWORK_PATH
>
pybabel是我使用以下命令创建的别名：
> alias pybabel='pybabel-2.7'
如何让babel在/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/babel中看到babel版本？
我尝试设置PYTHONPATH，但犯了一个错误。。。
我在pybabel使用的egg档案中创建了一个符号链接，链接到MacPorts版本中的localedata/，它似乎起到了作用：
> cd /Library/Python/2.7/site-packages/Babel-2.0_dev_20131218-py2.7.egg/babel
> ln -s /opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/babel/localedata localedata
ln: localedata: Permission denied
> sudo ln -s /opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/babel/localedata localedata
Password:
>
如果有人有更好的建议或建议，请留下评论或其他答案。非常感谢。
[后续2014-01-09]-----------------------------------------------------------------------------------------------------------------
我仍然无法翻译"｛%trans%｝"标签，我在这里发现你需要像那样在pybabel上显式使用-F选项(即使babel.cfg文件在当前目录中！)：
> pybabel -v extract -F babel.cfg -o ./locale/messages.pot ./
这里的帮助是我的babel.cfg文件的内容：
[jinja2: **/templates/**.html]
encoding = utf-8
[python: python/*.py]
[extractors]
jinja2 = jinja2.ext:babel_extract
但我收到了"ImportError:No module named…"错误消息，因为我没有正确配置jinja2和markupsafe。所以，我添加了两个符号链接：
> sudo ln -s /opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/jinja2 /Library/Python/2.7/site-packages/jinja2
> sudo ln -s /opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/markupsafe /Library/Python/2.7/site-packages/markupsafe
它终于成功了！我在messages.pot文件中获得了"｛%trans%｝"标签的内容！
然而，我想知道这是否是他最好的解决方案。。。