Here I created a custom callback in Keras in tf backend. That can be used in ML training. Using the callback I train the mnist dataset, which is available is in tf, with my custom callback. The acc on val set is more than 93.5%.
To see the learning rate in cmd type Get-Content .\log.txt -Wait
(windows) it will show the live progress of training with starting and ending log, along with training and val acc. Check the log.txt
for details.