pytorch-a2c-ppo-acktr
Update (April 12th, 2021)
PPO is great, but Soft Actor Critic can be better for many continuous control tasks. Please check out my new RL repository in jax.
Please use hyper parameters from this readme. With other hyper parameters things might not work (it's RL after all)!
This is a PyTorch implementation of
- Advantage Actor Critic (A2C), a synchronous deterministic version of A3C
- Proximal Policy Optimization PPO
- Scalable trust-region method for deep reinforcement learning using Kronecker-factored approximation ACKTR
- Generative Adversarial Imitation Learning GAIL
Also see the OpenAI posts: A2C/ACKTR and PPO for more information.
This implementation is inspired by the OpenAI baselines for A2C, ACKTR and PPO. It uses the same hyper parameters and the model since they were well tuned for Atari games.
Please use this bibtex if you want to cite this repository in your publications:
@misc{pytorchrl,
author = {Kostrikov, Ilya},
title = {PyTorch Implementations of Reinforcement Learning Algorithms},
year = {2018},
publisher = {GitHub},
journal = {GitHub repository},
howpublished = {\url{https://github.com/ikostrikov/pytorch-a2c-ppo-acktr-gail}},
}
Supported (and tested) environments (via OpenAI Gym)
- Atari Learning Environment
- MuJoCo
- PyBullet (including Racecar, Minitaur and Kuka)
- DeepMind Control Suite (via dm_control2gym)
I highly recommend PyBullet as a free open source alternative to MuJoCo for continuous control tasks.
All environments are operated using exactly the same Gym interface. See their documentations for a comprehensive list.
To use the DeepMind Control Suite environments, set the flag --env-name dm.<domain_name>.<task_name>, where domain_name and task_name are the name of a domain (e.g. hopper) and a task within that domain (e.g. stand) from the DeepMind Control Suite. Refer to their repo and their tech report for a full list of available domains and tasks. Other than setting the task, the API for interacting with the environment is exactly the same as for all the Gym environments thanks to dm_control2gym.
Requirements
- Python 3 (it might work with Python 2, but I didn't test it)
- PyTorch
- Stable baselines3
In order to install requirements, follow:
# PyTorch
conda install pytorch torchvision -c soumith
# Other requirements
pip install -r requirements.txt
Contributions
Contributions are very welcome. If you know how to make this code better, please open an issue. If you want to submit a pull request, please open an issue first. Also see a todo list below.
Also I'm searching for volunteers to run all experiments on Atari and MuJoCo (with multiple random seeds).
Disclaimer
It's extremely difficult to reproduce results for Reinforcement Learning methods. See "Deep Reinforcement Learning that Matters" for more information. I tried to reproduce OpenAI results as closely as possible. However, majors differences in performance can be caused even by minor differences in TensorFlow and PyTorch libraries.
TODO
- Improve this README file. Rearrange images.
- Improve performance of KFAC, see kfac.py for more information
- Run evaluation for all games and algorithms
Visualization
In order to visualize the results use visualize.ipynb.
Training
Atari
A2C
python main.py --env-name "PongNoFrameskip-v4"
PPO
python main.py --env-name "PongNoFrameskip-v4" --algo ppo --use-gae --lr 2.5e-4 --clip-param 0.1 --value-loss-coef 0.5 --num-processes 8 --num-steps 128 --num-mini-batch 4 --log-interval 1 --use-linear-lr-decay --entropy-coef 0.01
ACKTR
python main.py --env-name "PongNoFrameskip-v4" --algo acktr --num-processes 32 --num-steps 20
MuJoCo
Please always try to use --use-proper-time-limits flag. It properly handles partial trajectories (see https://github.com/sfujim/TD3/blob/master/main.py#L123).
A2C
python main.py --env-name "Reacher-v2" --num-env-steps 1000000
PPO
python main.py --env-name "Reacher-v2" --algo ppo --use-gae --log-interval 1 --num-steps 2048 --num-processes 1 --lr 3e-4 --entropy-coef 0 --value-loss-coef 0.5 --ppo-epoch 10 --num-mini-batch 32 --gamma 0.99 --gae-lambda 0.95 --num-env-steps 1000000 --use-linear-lr-decay --use-proper-time-limits
ACKTR
ACKTR requires some modifications to be made specifically for MuJoCo. But at the moment, I want to keep this code as unified as possible. Thus, I'm going for better ways to integrate it into the codebase.
Enjoy
Load a pretrained model from my Google Drive.
Also pretrained models for other games are available on request. Send me an email or create an issue, and I will upload it.
Disclaimer: I might have used different hyper-parameters to train these models.
Atari
python enjoy.py --load-dir trained_models/a2c --env-name "PongNoFrameskip-v4"
MuJoCo
python enjoy.py --load-dir trained_models/ppo --env-name "Reacher-v2"
Results
A2C
PPO
ACKTR
3 Jan 23, 2022
111 Dec 8, 2022
38 Dec 12, 2022
366 Nov 15, 2022
1 Dec 2, 2021
4 Dec 31, 2022
348 Dec 24, 2022
107 Apr 20, 2022
997 Dec 30, 2022
9 Jun 6, 2022
163 Dec 26, 2022
59 Dec 9, 2022
3 Dec 2, 2022
5 Feb 10, 2022
281 Dec 9, 2022
1 Oct 24, 2021
8 Sep 30, 2022
212 Dec 20, 2022