Sorry, probably I saw illusion... If uses cp932 codec, still
test_tarfile.py reports error. :-(

======================================================================
ERROR: test_tar_size (__main__.WriteTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "test_tarfile.py", line 570, in test_tar_size
    tar.add(path)
  File "/home/WhiteRabbit/python-dev/py3k/Lib/tarfile.py", line 1953, in add
    self.addfile(tarinfo, f)
  File "/home/WhiteRabbit/python-dev/py3k/Lib/tarfile.py", line 1976, in
addfile

    buf = tarinfo.tobuf(self.format, self.encoding, self.errors)
  File "/home/WhiteRabbit/python-dev/py3k/Lib/tarfile.py", line 987, in
tobuf
    return self.create_gnu_header(info, encoding, errors)
  File "/home/WhiteRabbit/python-dev/py3k/Lib/tarfile.py", line 1018, in
create_
gnu_header
    return buf + self._create_header(info, GNU_FORMAT, encoding, errors)
  File "/home/WhiteRabbit/python-dev/py3k/Lib/tarfile.py", line 1107, in
_create
_header
    stn(info.get("gname", "root"), 32, encoding, errors),
  File "/home/WhiteRabbit/python-dev/py3k/Lib/tarfile.py", line 177, in stn
    s = s.encode(encoding, errors)
UnicodeEncodeError: 'ascii' codec can't encode characters in position
0-3: ordin
al not in range(128)