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r g)�ModelTokenizer� z�Protocol for tokenizers that support chat templates.14 15This protocol defines the interface that tokenizers must implement16to work with chat-based environments. It's compatible with17Huggingface transformers tokenizers.18N� conversation�tokenize�return_tensors�kwargs�returnc � � g)ai Apply a chat template to format and optionally tokenize a conversation.19 20Args:21 conversation: List of message dictionaries with 'role' and 'content'22 tokenize: Whether to tokenize the output23 return_tensors: Format for returned tensors ('pt' for PyTorch)24 **kwargs: Additional arguments25 26Returns:27 Formatted and optionally tokenized conversation28Nr )�selfr r r! r" s r �apply_chat_template�"ModelTokenizer.apply_chat_template s � �$ r � token_ids�skip_special_tokensc � � g)z�Decode token IDs back to text.29 30Args:31 token_ids: Token IDs to decode32 skip_special_tokens: Whether to skip special tokens in output33 **kwargs: Additional arguments34 35Returns:36 Decoded text string37Nr )r% r( r) r" s r �decode�ModelTokenizer.decode3 s � � r r )TN)F)
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r r c �4 � \ rS rSrSr\S\S\4S j5 rSrg)� Transform�C a Transform observations to add rewards, metrics, or other modifications.41 42Transforms follow the TorchRL pattern where they take an observation43and return a (potentially modified) observation. This allows for44flexible reward computation and observation augmentation.45� observationr# c � � g)zrTransform an observation.46 47Args:48 observation: The input observation49 50Returns:51 The transformed observation52Nr �r% r2 s r �__call__�Transform.__call__K s � �
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rg)� Environment�X z�Base class for all environment servers following Gym/Gymnasium API.56 57Args:58 transform: Optional transform to apply to observations59N� transformc � � Xl g �N�r: )r% r: s r �__init__�Environment.__init___ s � �"�r r# c � � g)z5Reset the environment and return initial observation.Nr �r% s r �reset�Environment.resetb � � �
r �actionc � � g)z Take a step in the environment.Nr )r% rE s r �step�Environment.stepg rD r c � � g)z"Get the current environment state.Nr rA s r �state�Environment.statel s � �
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