From: https://code.google.com/p/psutil/issues/detail?id=416


# -*- coding: utf-8 -*-
from __future__ import unicode_literals
import os, errno
name = "ƒőő"
try:
    os.mkdir(name)
except OSError as err:
    if err.errno != errno.EEXIST:
        raise
os.statvfs(name)


The script above works fine on Python 3.3 but on 2.7 you'll get:

Traceback (most recent call last):
  File "foo.py", line 10, in <module>
    os.statvfs(name)
UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-2: ordinal not in range(128)

Patch in attachment fixes the issue.