o `۷i@sRddlZddlmZmZddlmZmZmZddlm Z e GdddedZ dS)N)ABCMetaabstractmethod)AnyDictOptional) DeveloperAPIc@seZdZdZeedefddZeededdfddZ eedd e edefd d Z eede e effd d Zeede e efddfddZede fddZdS)ReplayBufferInterfaceaAbstract base class for all of RLlib's replay buffers. Mainly defines the `add()` and `sample()` methods that every buffer class must implement to be usable by an Algorithm. Buffers may determine on all the implementation details themselves, e.g. whether to store single timesteps, episodes, or episode fragments or whether to return fixed batch sizes or per-call defined ones. returncCdS)zs