Yup but those are the only libraries for Python that'll use the GPU. The rest are mostly CPU-only (PyBrain, quite slow as a result), built on Theano (Lasagne, p

Yup but those are the only libraries for Python that'll use the GPU. The rest are mostly CPU-only (PyBrain, quite slow as a result), built on Theano (Lasagne, pydnn), very specific to a particular problem (Caffe) or written in a non-compatible language (Torch). Given that it supports 2/3 of the big general purpose libraries, it's good enough.