I am using Theano. The OS is Ubuntu. The Theano is UPTODATE. I am wondering why I am getting by from theano.tensor.signal.downsample import max_pool_2d command.
from theano.tensor.signal.downsample import max_pool_2d
Try to update the Theano using this link.
pip install --upgrade https://github.com/Lasagne/Lasagne/archive/master.zip