batch_learner: Removed IOError in favor of Exception as IOError is misleading. Suggests it was a system error.
batch_learner: Removed IOError in favor of Exception as IOError is misleading. Suggests it was a system error.

jakirkham/nanshe,DudLab/nanshe,nanshe-org/nanshe,DudLab/nanshe,nanshe-org/nanshe,jakirkham/nanshe