Concerning the Dataset trait, I wonder if you could not simply remove the dtype tag, it's set to its default value (None) anyway.

Thanks a lot for the PR !!

I think it should be enough to remove it but in the traittypes package

I think it should be enough to remove it but in the traittypes package

Well, dtype seems to be used in the traittypes package, only we set it to None because I guess we don't want to force the user to use a specific dtype. I suppose removing it from ipyleaflet is just fine.

Well, I can't say: maybe it's fine, but it doesn't fix the warning 😞

I don't have those warnings... Which traitlets version are you using?

traitlets==4.3.2

But I don't get the warnings on a regular import, only when imported through an entry point:

# something along
for entry_point in pkg_resources.iter_entry_points("personal.stuff"):
    entry_point.load()

I can merge this one as it is right now as it fixes some more warnings.

Thanks a lot for this PR! :)
I'll investigate concerning this Dataset thing

Thanks, about the extra warning, see jupyter-widgets/traittypes#41

Good!! :) Thanks very much