No module named _caffe

在主目录下打开python，在import caffe时遇到问题：

ImportError: No module named caffe
解决方法：
export PYTHONPATH=$PYTHONPATH:caffe/python

但是又遇到问题：
import caffe
Traceback (most recent call last):
File "", line 1, in
File "caffe/init.py", line 1, in
from .pycaffe import Net, SGDSolver, NesterovSolver, AdaGradSolver, RMSPropSolver, AdaDeltaSolver, AdamSolver, NCCL, Timer
File "caffe/pycaffe.py", line 13, in
from ._caffe import Net, SGDSolver, NesterovSolver, AdaGradSolver,
ImportError: No module named _caffe

解决方法：去caffe下make pycaffe -j16
这是caffe和python的接口