Is your feature request related to a problem? Please describe.
Currently callbacks are only evaluated at the end of each step using the on_step() method, this restrict the use case if we want to take some actions at the beginning or end of the evaluation process
Describe the solution you'd expect
Implement the methods on_start() and on_end() to let the user have bigger control over the evaluation process.
Re-evaluate which parameters should go to each method.
All the methods need to be optional inside the callbacks, and if its not defined, just pass
Is your feature request related to a problem? Please describe. Currently callbacks are only evaluated at the end of each step using the
on_step()method, this restrict the use case if we want to take some actions at the beginning or end of the evaluation processDescribe the solution you'd expect Implement the methods
on_start()andon_end()to let the user have bigger control over the evaluation process. Re-evaluate which parameters should go to each method. All the methods need to be optional inside the callbacks, and if its not defined, just pass