Yes, the material relies heavily on Python. I intentionally used popular open-source libraries (such as Gymnasium for RL environments, and PyTorch for deep learning) and Python itself given their popularity in the field, so that the content and learnings could be readily applicable to real-world projects.

The theory and algorithms per-se are general: they can be re-implemented in any language, as long as there are comparable libraries to use. But the notebooks are primarily in Python, and the (attempted) "frictionless" learning experience would lose a bit if the setup is in a different language, and it'll likely take a little bit more effort to follow along.