How to print acc while training?
🚀 Feature
Hi, I wanna print acc(or other metrics) while training in the traing bar,(just like Keras).
And for pytorch, I can compute cumulative acc for every training batch and print it,
However, In lightning, maybe I can compute cumulative acc in training_step(), but it seems like I can only print at the val time? How to print it in the training bar?
I am new to pytorch-lightning, so maybe there is something I missed in the docs?
Motivation
To know the training status at every batch,  not every epoch (like training_epoch_end() ).
possibly related issue: 100