mc7.py

history = model.fit_generator(
      train_generator,
      steps_per_epoch = np.ceil(2520/20),  # 2520 images = batch_size * steps
      epochs = 10,
      validation_data=validation_generator,
      validation_steps = np.ceil(372/20),  # 372 images = batch_size * steps
      callbacks=[callbacks],
      verbose = 2)