Ubuntu16.04 launching UnicodeDecodeError

[xyangk]

xiao@xiao-ubuntu:~$ jupyter notebook --debug
[D 11:27:12.526 NotebookApp] Searching [u'/home/xiao', '/home/xiao/.jupyter', '/usr/etc/jupyter', '/usr/local/etc/jupyter', '/etc/jupyter'] for config files
[D 11:27:12.526 NotebookApp] Looking for jupyter_config in /etc/jupyter
[D 11:27:12.526 NotebookApp] Looking for jupyter_config in /usr/local/etc/jupyter
[D 11:27:12.526 NotebookApp] Looking for jupyter_config in /usr/etc/jupyter
[D 11:27:12.526 NotebookApp] Looking for jupyter_config in /home/xiao/.jupyter
[D 11:27:12.526 NotebookApp] Looking for jupyter_config in /home/xiao
[D 11:27:12.527 NotebookApp] Looking for jupyter_notebook_config in /etc/jupyter
[D 11:27:12.527 NotebookApp] Looking for jupyter_notebook_config in /usr/local/etc/jupyter
[D 11:27:12.527 NotebookApp] Looking for jupyter_notebook_config in /usr/etc/jupyter
[D 11:27:12.527 NotebookApp] Looking for jupyter_notebook_config in /home/xiao/.jupyter
[D 11:27:12.527 NotebookApp] Looking for jupyter_notebook_config in /home/xiao
The Jupyter HTML Notebook.

这将启动一个基于tornado的HTML笔记本服务器，它提供一个html5/
javascript笔记本客户端。

Traceback (most recent call last):
  File "/usr/local/bin/jupyter-notebook", line 11, in <module>
    sys.exit(main())
  File "/usr/local/lib/python2.7/dist-packages/jupyter_core/application.py", line 266, in launch_instance
    return super(JupyterApp, cls).launch_instance(argv=argv, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/traitlets/config/application.py", line 657, in launch_instance
    app.initialize(argv)
  File "<decorator-gen-7>", line 2, in initialize
  File "/usr/local/lib/python2.7/dist-packages/traitlets/config/application.py", line 89, in catch_config_error
    app.print_help()
  File "/usr/local/lib/python2.7/dist-packages/traitlets/config/application.py", line 385, in print_help
    self.print_subcommands()
  File "/usr/local/lib/python2.7/dist-packages/traitlets/config/application.py", line 377, in print_subcommands
    print(os.linesep.join(lines))
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe5 in position 4: ordinal not in range(128)

I found similar issue here

xiao@xiao-ubuntu:~$ python -V
Python 2.7.12
xiao@xiao-ubuntu:~$ pip -V
pip 18.1 from /usr/local/lib/python2.7/dist-packages/pip (python 2.7)

This is my output of notebook.transutils

xiao@xiao-ubuntu:~$ jupyter notebook --version
5.7.0
xiao@xiao-ubuntu:~$ python -c "from notebook.transutils import trans, _; print(_('Untitled'))"
未命名

I tried this , but doesn't work

xiao@xiao-ubuntu:~$ LANG=zn jupyter notebook
The Jupyter HTML Notebook.

这将启动一个基于tornado的HTML笔记本服务器，它提供一个html5/
javascript笔记本客户端。

Traceback (most recent call last):
 File "/usr/local/bin/jupyter-notebook", line 11, in <module>
   sys.exit(main())
 File "/usr/local/lib/python2.7/dist-packages/jupyter_core/application.py", line 266, in launch_instance
   return super(JupyterApp, cls).launch_instance(argv=argv, **kwargs)
 File "/usr/local/lib/python2.7/dist-packages/traitlets/config/application.py", line 657, in launch_instance
   app.initialize(argv)
 File "<decorator-gen-7>", line 2, in initialize
 File "/usr/local/lib/python2.7/dist-packages/traitlets/config/application.py", line 89, in catch_config_error
   app.print_help()
 File "/usr/local/lib/python2.7/dist-packages/traitlets/config/application.py", line 385, in print_help
   self.print_subcommands()
 File "/usr/local/lib/python2.7/dist-packages/traitlets/config/application.py", line 377, in print_subcommands
   print(os.linesep.join(lines))
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe5 in position 4: ordinal not in range(128)

[Carreau]

You are using Python 2.7, please upgrade to Python 3.

[embray]

In case any Chinese users would like any actually useful help with this issue, while you should upgrade to using Python 3 versions of Jupyter if possible, if you cannot upgrade for whatever reason: try setting the environment variable LANGUAGE=en_US so that Jupyter doesn't try to use its Chinese translation, which clearly doesn't work well on Python 2. Or if that doesn't work, try one of LC_ALL, LC_MESSAGES, or LANG as described here: https://docs.python.org/2/library/gettext.html#gettext.bindtextdomain