Upgrade to Ray 0.8.7

[crypdick]

I am experiencing an issue with Ray which is fixed in 0.8.7; however, Modin has pinned the Ray version to 0.8.6 here. Can we please update the dependency?

[devin-petersohn]

Thanks @crypdick for the report, yes we should update it. I took last week off and am still catching up. You can install Ray 0.8.7 and bypass this in the short term with the following:

import os
os.environ["MODIN_ENGINE"] = "ray"  # set this first
import modin.pandas as pd  # then import

You can also set the environment variable outside of python as well.

On a more general note, it is probably time to relax the pin. I think the ray API has stabilized to the point where we can use a >= instead of a hard pin.

[crypdick]

@devin-petersohn here's what I get when I try that:

    import modin.pandas as mpd
  File "/home/ubuntu/anaconda3/lib/python3.7/site-packages/modin/pandas/__init__.py", line 170, in <module>
    execution_engine.subscribe(_update_engine)
  File "/home/ubuntu/anaconda3/lib/python3.7/site-packages/modin/__init__.py", line 93, in subscribe
    callback(self)
  File "/home/ubuntu/anaconda3/lib/python3.7/site-packages/modin/pandas/__init__.py", line 113, in _update_engine
    initialize_ray()
  File "/home/ubuntu/anaconda3/lib/python3.7/site-packages/modin/engines/ray/utils.py", line 147, in initialize_ray
    lru_evict=True,
TypeError: init() got an unexpected keyword argument 'include_webui'

[binarycrayon]

I have the same need so added a pr, thanks!

[binarycrayon]

@crypdick Ray community recently decided to rename webui to dashboard, so include_webui became include_dashboard. detail see this pr ray-project/ray#8999

I've mitigated that kwarg in my pr (basically changed to include_dashboard=False)

[crypdick]

Just figured out how to pin Modin to the latest master SHA, in case it's helpful to anyone:

pip install git+https://github.com/modin-project/modin.git@0c0b6f64bc9c6afc1267fe9fc703a0e30d783f96
pip install  "modin[ray] @ git+https://github.com/modin-project/modin.git@0c0b6f64bc9c6afc1267fe9fc703a0e30d783f96"

(haven't gotten this to work with requirements.txt)