Why isn't callback function working?

[DeltaG2]

Another post spells out how to fix when call back functioin is not working

Cannot get accuracy to 99% for handwritten digits problem

Cannot get accuracy to 99% for handwritten digits problem. What must I change in my code? My code is: mnist = tf.keras.datasets.mnist (x_train, y_train),(x_test, y_test) = mnist.load_data(path=path) x_train, x_test = x_train / 255.0, x_test / 255.0 # GRADED FUNCTION: train_mnist def train_mnist(): # Please write your code only where you are indicated. # please do not remove # model fitting inline comments. # YOUR CODE SHOULD START HERE class myCallback(tf.keras.callbacks.Cal…