neighbours.py has been modified in order to respect the flake8 style

theano/sandbox/cuda/neighbours.py

 from __future__ import absolute_import, print_function, division
 # This is work in progress
-from theano import Op, Apply, tensor
+from theano import Apply, tensor
 from theano.gof import local_optimizer
 from theano.sandbox.cuda import cuda_available, GpuOp