    - nbsphinx==0.3.5
    - recommonmark==0.4.0
    - https://github.com/mli/notedown/tarball/master
    - https://s3-us-west-2.amazonaws.com/szha-experiments/mxnet_cu92-1.4.0b20181219-py2.py3-none-manylinux1_x86_64.whl
    - gluonbook==0.8.8
    - jieba==0.39
    - awscli
 
</s> remove   - gluonbook==0.8.8
 </s> add   - gluonbook==0.8.9 </s> remove                 epoch + 1, math.exp(l_sum / (t + 1)), time.time() - start))
 </s> add                 epoch + 1, math.exp(l_sum / n), time.time() - start)) </s> remove                 epoch + 1, math.exp(l_sum / (t + 1)), time.time() - start))
 </s> add                 epoch + 1, math.exp(l_sum / n), time.time() - start)) </s> remove               % (epoch, train_l_sum / len(train_iter),
                 train_acc_sum / len(train_iter), test_acc, time.time() - start))
 </s> add               % (epoch + 1, train_l_sum / n, train_acc_sum / n, test_acc,
                 time.time() - start)) </s> remove             l_sum += l.asscalar()
 </s> add             l_sum += l.asscalar() * y.size
            n += y.size
  - gluonbook==0.8.9
    - nbsphinx==0.3.5
    - recommonmark==0.4.0
    - https://github.com/mli/notedown/tarball/master
    - https://s3-us-west-2.amazonaws.com/szha-experiments/mxnet_cu92-1.4.0b20181219-py2.py3-none-manylinux1_x86_64.whl
  - gluonbook==0.8.9
    - jieba==0.39
    - awscli
keep keep keep keep replace keep keep
 gb 0.8.9, fix acc, loss computations 
build/env.yml