title: How to calculate mean absolute percentage error for regression probem in Python?
body: <p>I am trying to calculate percentage error of the performance for regression problem. I tried some methods described in other answers but it seems to be not working properly, please let me know if you know/ have used or implemented any code to compute <strong>percentage RMSE</strong> or <strong>mean absolute peprcentage error</strong> in tensorflow-keras.</p>