Why do not provide the Runner Constructor

[densechen]

There are OptimizerConstructor ..., but why not provide a runner constructor?
It would be more general and flexible to implement some functions.
Looking forward it.

[zhouzaida]

hi @densechen , Thanks for your feedback. Could you give an example of what functions do you want to implement

[densechen]

Hi, @zhouzaida, if a RunnerConstructor is provided, we can have the ability to make some extra operations on the build runner without the necessary to change the user code.
By the way, we have developed a new open source pytorch-style federated learning library, which will be released soon.
We are currently palning to write an extra package that constumed for mm-xxx project. It will make all the mm-xxx project enable to do federated learning experiments without the necessary to change the user code, but just import our extra package at the beginning of code.
While developing this extra package, we found that it may be more flexible to provide a RunnerConstructor in our case.

[zhouzaida]

@ZwwWayne , please have a look

[densechen]

Any update?

[zhouzaida]

yet, That sounds so good. And are you willing to create a PR?

[ZwwWayne]

Hi @densechen ，
Thanks for your kind suggestion. We do not do that before just because we have not considered it:). We are indeed considering making runners more flexible. For now, we think RunnerConstructor might be a good suggestion but we need to consider it further because it is actually a big change and needs a complete design. Therefore, it might take some time before we make the decision and make it.

[densechen]

@ZwwWayne @zhouzaida Thanks for your replies. And I will create a PR as soon as possible and also make sure that minor modification is needed.

[zhouzaida]

Looking forward to your PR

[zhouzaida]

closed by #1296