The team chose Python because, in the speaker's assessment, pretrained models are fairly capable at using Python.

“an ability to manage factories of arbitrary size you want the model to be able to come up with classes with functions with data structures such that when it has a factory that might be producing millions of resources a second it might be sprawled over over a huge amount of the game space it needs to be able to reason over these different parts of the factory efficiently so we decided python because the models pre-trained models are pretty good at python and that was you know a reasonable choice”