Setting up TPU on Tensorflow Cloud for Deep Reinforcement Learning

https://cloud.google.com/ml-engine/docs/tensorflow/using-tpus

https://medium.com/the-artificial-impostor/keras-for-tpus-on-google-colaboratory-free-7c00961fed69

https://medium.com/@jannik.zuern/using-a-tpu-in-google-colab-54257328d7da

https://colab.research.google.com/notebooks/tpu.ipynb

https://heartbeat.fritz.ai/step-by-step-use-of-google-colab-free-tpu-75f8629492b3

https://cloud.google.com/tpu/docs/colabs

https://stackoverflow.com/questions/52530578/how-use-tpu-in-google-colab

https://www.endtoend.ai/gsoc/1

https://github.com/tensorflow/agents

https://cloud.google.com/tpu/docs/troubleshooting  

https://cloud.google.com/ml-engine/docs/tensorflow/using-tpus

https://www.tensorflow.org/guide/using_tpu

and a few colabs examples:

https://colab.research.google.com/drive/12QvW7VZSzoaF-Org-u-N6aiTdBN5ohNA