File "/usr/local/lib/python2.7/dist-packages/caffe2/python/utils.py", line 10, in <module>
from future.utils import viewitems
ImportError: No module named future.utils
其實是，future沒有安裝的緣故：
sudo pip install future -i https://pypi.tuna.tsinghua.edu.cn/simple
就可以了