cannot import name 'OPTICS'

[fissehab]

I want to perform clustering using OPTICS in sklearn and I started with the example, but I am getting an error that I cannot import OPTICS. Any suggestions. Here is the example

from sklearn.cluster import OPTICS

 ImportError: cannot import name 'OPTICS' 

[adrinjalali]

OPTICS is still experimental and only available on master, and is not released yet. You should take extreme caution using it, and expect bugs and major changes in the API by the time it gets released.

We hope to have it out by v0.21.

[wolfiex]

Still unreleased?

[jnothman]

Released in 0.21.

[wolfiex]

Ah the error lies in the wrong version being installed by pip. A fresh (cached cleared, new env) install pip install sklearn from the pypy repository (it should be scikit-learn 0.21.3) installs 0.20.4 instead.

It might be worth noting that for those of us still who prefer python 2 (for various reasons) the version containing this cannot be installed. Instead, the solution lies in coping optics.py from the github repository, and replacing all the relative imports ..<modulename> with sklearn.<modulename>

[rth]

Ah the error lies in the wrong version being installed by pip. A fresh (cached cleared, new env) install pip install sklearn from the pypy repository (it should be scikit-learn 0.21.3) installs 0.20.4 instead.

Python 3 2 is explicitly not supported for 0.21+ so this behavior is expected.

[jnothman]

That was a typo, @rth. Python 2 is not supported in versions from 0.21. I expect that 0.20.4 was our last python 2 release ever.

[rth]

Yes, thanks for catching it.