DQN on Pong
Before we jump into the code, some introduction is needed. Our examples are becoming increasingly challenging and complex, which is not surprising, as the complexity of problems we're trying to tackle is also growing. The examples are as simple and concise as possible, but some of the code may be difficult to understand at first.
Another thing to note is performance. Our previous examples for FrozenLake, or CartPole, were not demanding from a performance perspective, as observations were small, neural network parameters were tiny, and shaving off extra milliseconds in the training loop wasn't important. However, from now on, that's not the case anymore. One single observation from the Atari environment is 100k values, which has to be ...
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