AAS2019_NNexample.ipynb plot_model_history(vgg_model.history) - KeyError: 'loss'

[JosephKarpinski]

See attached screen print

below

Running sample code got:

KeyError: 'loss'

KeyError Traceback (most recent call last)
/var/folders/39/hmv9hpy10cg6cx015773lbtw0000gn/T/ipykernel_2037/1962927886.py in
1 # plot the training history
----> 2 plot_model_history(vgg_model.history)

/var/folders/39/hmv9hpy10cg6cx015773lbtw0000gn/T/ipykernel_2037/664928204.py in plot_model_history(history)
92
93 # Extract loss and accuracy
---> 94 loss = history.history['loss']
95 val_loss = history.history['val_loss']
96 acc = history.history['accuracy']

KeyError: 'loss'