Fix validation weight
The validation data set is passed to kera's fit method as a tuple (x_val, y_val). However, this does not propagate the event weights to keras. To mitigate the issue, one should switch to (x_val, y_val, val_weights) pattern.
The validation data set is passed to kera's fit method as a tuple (x_val, y_val). However, this does not propagate the event weights to keras. To mitigate the issue, one should switch to (x_val, y_val, val_weights) pattern.