I think you should rather call the utils.create_task_dict function with keyword arguments directly in the task_dict method from the ListerBase class instead of overriding it here.

s/Mapping/Dict/

I would rather use the same task arguments format (keyword) for all loaders here.

Yes, same.

i'll land D2409 and D2410 first ;)

I could not really do it before (well morally).

Something hit me, thus i keep doing that.

I thought it was better to be generic in the output (so Mapping here)
And specific in the input (so Dict as parameter).

That's the one thing i remember clearly from zack's slide (and what he told me ;).
Am i misremembering?

Yes, the recommended way is the opposite: use a concrete type in the output and a generic type in the input.

See https://mypy.readthedocs.io/en/latest/cheat_sheet_py3.html#standard-duck-types

Thanks!

Will try to fix my erroneous ways ;)

I checked zack's slide.
I inverted what's said there, great!

Be conservative in what you send, be liberal in what you accept.