metarl.sampler.sampler_deprecated module

Base class of Sampler.

class BaseSampler(algo, env)

Bases: metarl.sampler.sampler_deprecated.Sampler

Base class for sampler.

Parameters:

• algo (metarl.np.algos.RLAlgorithm) – The algorithm.
• env (gym.Env) – The environment.

class Sampler

Bases: abc.ABC

Sampler interface.

obtain_samples(itr, batch_size, whole_paths)

Collect samples for the given iteration number.

Parameters:

• itr (int) – Number of iteration.
• batch_size (int) – Number of environment steps in one batch.
• whole_paths (bool) – Whether to use whole path or truncated.

Returns:

A list of paths.

Return type:

list[dict]

shutdown_worker()

Terminate workers if necessary.

start_worker()

Initialize the sampler.

e.g. launching parallel workers if necessary.