Create a command for computing the accuracy

[dnesteryuk]

There isn't any possibility to understand how good the model works for a particular site. So, we need a command (mix task) which will measure the accuracy of the prediction.

80% of the loaded sessions should be used for training the model and 20% for validating (the model mustn't access them).

RMSE might be used for measuring errors.

[dnesteryuk]

This article gives some ideas https://towardsdatascience.com/train-test-split-and-cross-validation-in-python-80b61beca4b6