def filter_nonzero(data, combine=None):

    nz_feats = nonzero_features(data, combine)

    return [set[:, nz_feats] for set in data]

##################################################
# Iterator object for minibatches of datasets
##################################################
tests that get_debug_value raises an exception when
dataset/ETHPy150Open lisa-lab/pylearn2/pylearn2/utils/datasets.py/filter_nonzero--crossover with--dataset/ETHPy150Open rizar/attention-lvcsr/libs/Theano/theano/gof/tests/test_op.py/test_get_debug_values_exc