python psutil.cpu_times_percent().guest_nice AttributeError：‘scputime’对象没有属性'guest_nice‘

yum install python-psutil.x86_64
yum info python-psutil.x86_64
Installed Packages
Name        : python-psutil
Arch        : x86_64
Version     : 0.6.1
Release     : 1.el6
Size        : 354 k
Repo        : installed
From repo   : epel
Summary     : A process and system utilities module for Python
URL         : http://psutil.googlecode.com/
License     : BSD
Description : psutil is a module providing an interface for retrieving information on all
        : running processes and system utilization (CPU, memory, disks, network, users) in
        : a portable way by using Python, implementing many functionalities offered by
        : command line tools such as: ps, top, df, kill, free, lsof, free, netstat,
        : ifconfig, nice, ionice, iostat, iotop, uptime, pidof, tty, who, taskset, pmap.

ERROR:  AttributeError: 'module' object has no attribute 'get_sysinfo'
ERROR:  AttributeError: 'scputimes' object has no attribute 'guest_nice'

>>> import psutil
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib64/python2.6/site-packages/psutil/__init__.py", line 64, in     <module>
    import psutil._pslinux as _psplatform
  File "/usr/lib64/python2.6/site-packages/psutil/_pslinux.py", line 89, in     <module>
    TOTAL_PHYMEM = _psutil_linux.get_sysinfo()[0]
AttributeError: 'module' object has no attribute 'get_sysinfo'

>>> import psutil
Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
  File "psutil/__init__.py", line 101, in <module>
    from . import _pslinux as _psplatform
  File "psutil/_pslinux.py", line 26, in <module>
    from . import _psutil_linux as cext
ImportError: cannot import name _psutil_linux

>>> from psutil import cpu_times_percent, cpu_percent, cpu_count
>>> from os import getloadavg