failed to save utf-8 characters

[chfw]

Traceback (most recent call last):
File "/usr/bin/moban", line 9, in
load_entry_point('moban==0.0.1', 'console_scripts', 'moban')()
File "/usr/lib/python2.7/site-packages/moban/main.py", line 38, in main
handle_command_line(options)
File "/usr/lib/python2.7/site-packages/moban/main.py", line 114, in handle_command_line
options[constants.LABEL_OUTPUT]
File "/usr/lib/python2.7/site-packages/moban/engine.py", line 35, in render_to_file
apply_template(template, data, output_file)
File "/usr/lib/python2.7/site-packages/moban/engine.py", line 77, in apply_template
output.write(rendered_content)
UnicodeEncodeError: 'ascii' codec can't encode character u'\xa0' in position 43248: ordinal not in range(128)