코드

import matplotlib.pyplot as plt
fig, loss_ax = plt.subplots()
acc_ax = loss_ax.twinx()

loss_ax.plot(hist.history['loss'], 'y', label = 'train loss')
loss_ax.plot(hist.history['val_loss'], 'r', label = 'val loss')

acc_ax.plot(hist.history['accuracy'], 'b', label = 'train accuracy')
acc_ax.plot(hist.history['val_accuracy'], 'g', label = 'valid accuracy')

loss_ax.set_xlabel('epoch')
loss_ax.set_ylabel('loss')
acc_ax.set_ylabel('accuracy')

loss_ax.legend(loc='upper left')
acc_ax.legend(loc='lower left')

plt.show()

결과