No early stopping implemented in Chapter 3 (yelp)

[lisanka93]

The early_stopping_best_val never gets updated so the loss is ALWAYS smaller and early stopping never happens
this line of code is missing in the if-else statement in update_train_stage function:

train_state['early_stopping_best_val'] = loss_t

[Rucious-Aladdin]

please modify the syntax inside the update_train_state function as follows and ensure that the minimum value is initialized.

def update_train_state(args, model, train_state):
"""
codes...
"""
    if loss_t < train_state['early_stopping_best_val']:
         torch.save(model.state_dict(), train_state['model_filename'])
         train_state['early_stopping_best_val'] = loss_t