def reset_statistics(self):
    self.stats = {}
    self.namespace_info = {}
    self.num_deletes = 0
    self.journal_entries_cleaned = 0
cross entropy loss, summed over classes, mean over batches
dataset/ETHPy150Open AppScale/appscale/AppDB/groomer.py/DatastoreGroomer.reset_statistics--crossover with--dataset/ETHPy150Open benanne/kaggle-ndsb/utils.py/log_loss