python pycuda(Linux)错误 - python

我已经通过以下链接安装了python + pycuda(和其他库):http://wiki.tiker.net/PyCuda/Installation/Linux

但是当我运行测试程序时,它说:

Traceback (most recent call last):
File "test_driver.py", line 17, in <module>
import pycuda.gpuarray as gpuarray
File "/usr/local/lib/python2.7/dist-packages/pycuda-2014.1-py2.7-linux-x86_64.egg/pycuda/gpuarray.py", line 3, in <module>
import pycuda.elementwise as elementwise
File "/usr/local/lib/python2.7/dist-packages/pycuda-2014.1-py2.7-linux-x86_64.egg/pycuda/elementwise.py", line 34, in <module>
from pytools import memoize_method
File "/usr/local/lib/python2.7/dist-packages/pytools-2014.3.5-py2.7.egg/pytools/__init__.py", line 5, in <module>
from six.moves import range, zip, intern, input
ImportError: cannot import name intern

六个已安装。我不知道该怎么办!

python大神给出的解决方案

在OSX系统上,我设法通过pip升级六个软件包来解决问题。即
$ pip安装六个--upgrade