Python class

ReasoningParser

`ReasoningParser`

class max.interfaces.ReasoningParser

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Bases: ABC

Parser for identifying reasoning spans in model output.

abstract async classmethod from_tokenizer(tokenizer)

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Constructs a reasoning parser from a tokenizer.

Parameters:: tokenizer (PipelineTokenizer[Any, Any, Any]) – The PipelineTokenizer to use for resolving reasoning delimiter token IDs.
Returns:: A new ReasoningParser instance.
Return type:: ReasoningParser

abstract stream(delta_token_ids)

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Identifies a reasoning span within a streaming delta chunk.

Parameters:: delta_token_ids (Sequence[int]) – The token IDs of the incremental streaming chunk.
Returns:: A tuple of (ReasoningSpan, is_still_reasoning) where is_still_reasoning indicates whether the reasoning section has ended. The ReasoningSpan identifies the reasoning portion of the chunk. If there is no reasoning in the chunk, the span is zero-width so that ReasoningSpan.extract_content() behaves as identity and ReasoningSpan.extract_reasoning() returns an empty list.
Return type:: tuple[ReasoningSpan, bool]