.. _quickstart:

===============
Getting Started
===============

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

Here is a quick example of how to train and run A2C on a CartPole environment:

.. code-block:: python

  import gym

  from stable_baselines3 import A2C

  env = gym.make('CartPole-v1')

  model = A2C('MlpPolicy', env, verbose=1)
  model.learn(total_timesteps=10000)

  obs = env.reset()
  for i in range(1000):
      action, _state = model.predict(obs, deterministic=True)
      obs, reward, done, info = env.step(action)
      env.render()
      if done:
        obs = env.reset()

.. note::

	You can find explanations about the logger output and names in the :ref:`Logger <logger>` section.


Or just train a model with a one liner if
`the environment is registered in Gym <https://github.com/openai/gym/wiki/Environments>`_ and if
the policy is registered:

.. code-block:: python

    from stable_baselines3 import A2C

    model = A2C('MlpPolicy', 'CartPole-v1').learn(10000)
