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All Projects → nikhilbarhate99 → Ppo Pytorch

nikhilbarhate99 / Ppo Pytorch

Licence: mit
Minimal implementation of clipped objective Proximal Policy Optimization (PPO) in PyTorch

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python
139335 projects - #7 most used programming language

Labels

pytorchdeep-reinforcement-learningpytorch-tutorialppopolicy-gradient

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PPO-PyTorch

Minimal PyTorch implementation of Proximal Policy Optimization with clipped objective for OpenAI gym environments.

Usage

  • To test a preTrained network : run test.py or test_continuous.py
  • To train a new network : run PPO.py or PPO_continuous.py
  • All the hyperparameters are in the PPO.py or PPO_continuous.py file
  • If you are trying to train it on a environment where action dimension = 1, make sure to check the tensor dimensions in the update function of PPO class, since I have used torch.squeeze() quite a few times. torch.squeeze() squeezes the tensor such that there are no dimensions of length = 1 (more info).
  • Number of actors for collecting experience = 1. This could be changed by creating multiple instances of ActorCritic networks in the PPO class and using them to collect experience (like A3C and standard PPO).

Dependencies

Trained and tested on:

Python 3.6
PyTorch 1.0
NumPy 1.15.3
gym 0.10.8
Pillow 5.3.0

Results

PPO Discrete LunarLander-v2 (1200 episodes) PPO Continuous BipedalWalker-v2 (4000 episodes)

References

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