List the pieces of a reinforcement learning system that can learn how to play Atari games.
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A typical reinforcement learning system that can learn how to play Atari games consists of the following components:

1. Environment: The Atari games environment in which the agent interacts and learns.

2. Agent: The decision-making entity that interacts with the environment and takes actions to maximize its rewards.

3. Policy: A function that maps state to actions. The policy determines the agent's behavior in the environment.

4. Value Function: A function that estimates the expected cumulative reward of a state or state-action pair. The value function is used to evaluate the quality of the agent's policy.

5. Experience Buffer: A buffer that stores the agent's experiences (i.e., state, action, reward, next state) for training the agent's policy and value function.

6. Exploration Strategy: A mechanism for the agent to explore the environment to learn about the state-action space.

7. Training Algorithm: An algorithm that uses the agent's experiences stored in the experience buffer to update the agent's policy and value function.

8. Neural Network: A deep neural network that is used to represent the policy and/or the value function. The neural network is trained by the training algorithm to approximate the optimal policy and/or value function.

9. Evaluation Metrics: Metrics used to evaluate the performance of the agent, such as the average score or win rate on the Atari games.
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guide me through building such a system.
user
Building a reinforcement learning system that can learn how to play Atari games is a complex task, but I can guide you through the general steps to build such a system.

Step 1: Set up the environment
The first step is to set up the environment in which the agent will interact and learn. You can use the OpenAI Gym library to create an Atari game environment.

Step 2: Design the agent
The agent is the decision-making entity that interacts with the environment and takes actions to maximize its rewards. You can design the agent as a deep reinforcement learning agent that uses a deep neural network to represent the policy and/or the value function.

Step 3: Define the policy and value function
Define the policy and value function that will be used by the agent to learn and make decisions in the environment. You can use a deep neural network to approximate the optimal policy and/or value function.

Step 4: Choose the exploration strategy
Choose an exploration strategy for the agent to explore the environment and learn about the state-action space. Examples of exploration strategies include epsilon-greedy exploration and Boltzmann exploration.

Step 5: Collect and store experiences
The agent needs to collect experiences in the environment and store them in the experience buffer. The experience buffer stores the agent's experiences (i.e., state, action, reward, next state) for training the agent's policy and value function.

Step 6: Train the agent
Train the agent by using the experiences stored in the experience buffer to update the agent's policy and value function. You can use a training algorithm such as deep Q-learning to train the agent.

Step 7: Evaluate the agent's performance
Evaluate the performance of the agent by measuring its average score or win rate on the Atari games. You can use evaluation metrics to evaluate the performance of the agent and identify areas for improvement.

By following these steps, you can build a reinforcement learning system that can learn how to play Atari games. Keep in mind that there may be additional steps or modifications required depending on the specific Atari game and reinforcement learning algorithm you are using.
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