ImportError: No module named _caffe

[helxsz]

after the installation, I tried to run the inference_patches.py, an error "ImportError: No module named _caffe" occurred

sys.path.insert(0,CAFFE_ROOT+"/python")
import caffe

I read some other notes with similar problems, which says _caffe.so should be in the /python folder after make pycaffe

I can find the libcaffe.so and libcaffe.so.1.0.0-rc4 in the /caffe/build/lib, but in the /python folder i could find any _caffe.so. to make _caffe.so as suggested by some other, I tried ' make pycaffe ' inside /python folder, but a 'no rule to make target pycaffe ' error occored

[nshaud]

Did you edit the CAFFE_ROOT variable in the config.py file ? It should point to the folder in which you installed Caffe.

[helxsz]

I found the problem is related to ubuntu 16.04 but now it works for 14.04. I still don't know what is the problem for 16.04.

[nshaud]

Great ! Do you mind explaining what was the problem and how you solved it in case someone else encounters the same bug ?

[helxsz]

Most reason is related to the installation of caffe in 16.04. In 16.04 python 3 and opencv 3.5 is used, therefore can cause the caffe fail to produce the _caffe.so in these cases.