Unable to get Observation/StateInformation for the game of go

[Gregory-Eales]

there seems to be no way to access the go board using the python API

[lanctot]

You are right, it is simply missing.

Should be quite easy to add go::GoGame::Observation and go::GoGame::ObservationAsNormalizedVector (similar to chess::ChessGame::InformationSetAsNormalizedVector but simpler since there are only two piece types).

Feel free to submit a pull request! Otherwise, we will add it in one of the next updates.

[lanctot]

BTW this should be relatively straight-forward, only requiring inspecting the underlying go board object declared here: https://github.com/deepmind/open_spiel/blob/26349aeb2c09cbe8f876678007f9543bf51aa28a/open_spiel/games/go.h#L88

[lanctot]

Quick heads up, the information state and observation string functions have been contributed by @Gregory-Eales in PR #40. Thanks!

I will add the Observation as vector shortly.

[lanctot]

Re-opening because I'd like to use this issue to test that our automated tools will indeed automatically close the issue when I push to github (and associate the commits properly).

That, and it's not actually in yet! :)