stable-baselines 1.0.5

A fork of OpenAI Baselines, implementations of reinforcement learning algorithms.

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# Stable Baselines

Stable Baselines is a set of improved implementations of reinforcement learning algorithms based on OpenAI [Baselines](https://github.com/openai/baselines/).

These algorithms will make it easier for the research community and industry to replicate, refine, and identify new ideas, and will create good baselines to build projects on top of. We expect these tools will be used as a base around which new ideas can be added, and as a tool for comparing a new approach against existing ones. We also hope that the simplicity of these tools will allow beginers to experiment with a more advanced toolset, without being buried in implementation details.

## Main differences with OpenAI Baselines
This toolset is a fork of OpenAI Baselines, with a major strutural refactoring, and code cleanups:

- Unified structure for all algorithms
- PEP8 compliant (unified code style)
- Documented functions and classes
- More tests & more code coverage

## Links

Repository:
https://github.com/hill-a/stable-baselines

Medium article:
https://medium.com/@araffin/df87c4b2fc82

## Quick example

Most of the library tries to follow a sklearn-like syntax for the Reinforcement Learning algorithms using Gym.

Here is a quick example of how to train and run PPO2 on a cartpole environment:

```python
import gym

from stable_baselines.common.policies import MlpPolicy
from stable_baselines.common.vec_env import DummyVecEnv
from stable_baselines import PPO2

env = gym.make('CartPole-v1')
env = DummyVecEnv([lambda: env]) # The algorithms require a vectorized environment to run

model = PPO2(MlpPolicy, env, verbose=1)
model.learn(total_timesteps=10000)

obs = env.reset()
for i in range(1000):
action, _states = model.predict(obs)
obs, rewards, dones, info = env.step(action)
env.render()
```

Or just train a model with a one liner if [the environment is registed in Gym](https://github.com/openai/gym/wiki/Environments):

```python
from stable_baselines.common.policies import MlpPolicy
from stable_baselines import PPO2

model = PPO2(MlpPolicy, 'CartPole-v1').learn(10000)
```