TypeError while executing 'pybabel update ...' in Python 3.x

[williamwu0220]

I installed babel in Python 3.4.0 env, and babel cannot work while using update sub-command as follows:

william$ pybabel update -i i18n/locale/message.pot  -l zh_TW -d i18n/locale/ -D i18n
updating catalog 'i18n/locale/zh_TW/LC_MESSAGES/i18n.po' based on 'i18n/locale/message.pot'
Traceback (most recent call last):
  File "/Users/william/venv/pyramid/bin/pybabel", line 9, in <module>
    load_entry_point('Babel==1.3', 'console_scripts', 'pybabel')()
  File "/Users/william/venv/pyramid/lib/python3.4/site-packages/babel/messages/frontend.py", line 1151, in main
    return CommandLineInterface().run(sys.argv)
  File "/Users/william/venv/pyramid/lib/python3.4/site-packages/babel/messages/frontend.py", line 665, in run
    return getattr(self, cmdname)(args[1:])
  File "/Users/william/venv/pyramid/lib/python3.4/site-packages/babel/messages/frontend.py", line 1130, in update
    width=options.width)
  File "/Users/william/venv/pyramid/lib/python3.4/site-packages/babel/messages/pofile.py", line 444, in write_po
    _write(comment_header + u'\n')
  File "/Users/william/venv/pyramid/lib/python3.4/site-packages/babel/messages/pofile.py", line 388, in _write
    fileobj.write(text)
TypeError: must be str, not bytes

My env:
python: 3.4.0
os: Debian Wheezy
Babel: 1.3

[AlexKovalevych]

+1

[atomd-zz]

+1

[giampaolo]

+1
Our migration is currently blocked by this.

[giampaolo]

Here's some more input which I hope it will help debugging this problem.
This is the situation before hitting TypeError:

(Pdb) fileobj
<_io.TextIOWrapper name='locale/de/LC_MESSAGES/tmpgoodscloud.po' mode='w' encoding='UTF-8'>
(Pdb) text
b'# SOME DESCRIPTIVE TITLE.\n# Copyright (C) 2013 ORGANIZATION'
(Pdb) fileobj.write(text)
*** TypeError: must be str, not bytes

The problem is "fileobj" which is a TextIOWrapper() instance and the original "fileobj" is created in frontend.py as a text file (instead of a binary file):

tmpname = os.path.join(os.path.dirname(filename),
                       tempfile.gettempprefix() +
                       os.path.basename(filename))
tmpfile = open(tmpname, 'w')
try:
    try:
        write_po(tmpfile, catalog,
                 ignore_obsolete=self.ignore_obsolete,
                 include_previous=self.previous, width=self.width)
        ...

The code extract above was taken from Babel 1.3, which is currently the latest available version on PYPI. I now took a quick look at latest GIT code on master which looks different:

-    tmpfile = open(tmpname, 'w')
+    tmpfile = open(tmpname, 'wb')

So it seems that this problem has apparently already been fixed. What we need is a new version of Babel officially released on PYPI. Any plans on when that might happen? IMHO this should be considered a high-priority issue.

[williamwu0220]

+1 again. This is the last issue which is blocking me using Python 3 with Pyramid. :(

[jbhoot]

Agreed. And officially fixed version would be a welcome.

[dmitrybelyakov]

Same for us

[rosariomgomez]

+1 here..., any update on when the new package will be released on pypi? thank you very much for your work

[andras-tim]

+1

[williamwu0220]

Looks like this issue had been solved in master branch. Will there be any release plan in the near future? Or should we need to fork this project to make that happen? Please... :(

[torotil]

+1

[williamwu0220]

I created a new project Py3Babel forked from Babel: https://github.com/williamwu0220/py3babel/
Patches welcome..
You can install the package via pip:
pip install Py3Babel