This is a guide on how to update the aima-data submodule. This needs to be done every time something changes in the aima-data repository. All the below commands should be executed from the local directory of the aima-python repository, using git.
git submodule deinit aima-data
git rm aima-data
git submodule add https://github.com/aimacode/aima-data.git aima-data
git commit
git push origin
Then you need to pull request the changes (unless you are a collaborator, in which case you can commit directly to the master).