CI is failing

Why isn't the CI running? O_o

EDIT working

The system's skimage is too old, and I have no idea why this is not working. @thomasjpfan any hints?

The quick solution is to only install skimage on instances with conda.

@thomasjpfan but that doesn't fix our issue, since I think one of the tests failing in #14675 is not a conda env.

I am concerned with how fragile this is. I'll look into this.

thanks for the fixes @thomasjpfan , should we merge then?

From my understanding this is for #14675. We would need to disable the doctest for all but one instance (by using doc/conftest.py). I think I am +0 on that.

From my understanding this is for #14675. We would need to disable the doctest for all but one instance (by using doc/conftest.py). I think I am +0 on that.

I'm not sure if I understand what exactly you mean @thomasjpfan

We use https://github.com/scikit-learn/scikit-learn/blob/master/doc/conftest.py to skip doctest on some files depending if a package is installed. Adding scikit-image will add doc/tutorial/statistical_inference/unsupervised_learning.rst to this list of files to skip.

Now that I see that scikit-image is already a doc building dependency, I am okay +1 on this.

Thanks @thomasjpfan , @glemaitre you ok with this now?

I am fine with it since this is in the doc building dependency

Thanks @thomasjpfan @adrinjalali

Let's finish up #14675