ImportError cannot import name BytesIO when import caffe on ubuntu

Question

I am trying to make caffe running on my machine equipped with Ubuntu 12.04LTS. After finishing all the steps on the Installation page, I trained the LeNet model successfully an

Answer 1

You appear to have a package or module named io in your Python path that is masking the standard library package. It is imported instead but doesn't have a BytesIO object to import.

Try running:

python -c 'import io; print io.__file__'

in the same location you are running the tutorial and rename or move the file named by that import, presuming it is not the standard library version (ending in lib/python2.7/io.pyc).

It could be you set your Python path to the wrong directory. You should include path/to/caffe/python, not path/to/caffe/python/caffe, nor should you try and run python with the latter as your current working directory. In both cases caffe/python/caffe/io.py instead of the standard library version.

The installation instructions are not at fault here; they clearly tell you to use:

export PYTHONPATH=/path/to/caffe/python:$PYTHONPATH

Note the lack of /caffe at the end of that path.