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append_to_last_tokens() — langchain Function Reference

Architecture documentation for the append_to_last_tokens() function in streaming_stdout_final_only.py from the langchain codebase.

Function python LangChainCore MessageInterface called by 1

Entity Profile

Dependency Diagram

graph TD
  8ce35f14_977d_60d3_1288_c6ed5fd9cb8e["append_to_last_tokens()"]
  f95e695f_57c0_a0ed_1f28_1ea7c2b7584d["FinalStreamingStdOutCallbackHandler"]
  8ce35f14_977d_60d3_1288_c6ed5fd9cb8e -->|defined in| f95e695f_57c0_a0ed_1f28_1ea7c2b7584d
  d608f7aa_7bee_2b7c_2da5_9d1292ea5966["on_llm_new_token()"]
  d608f7aa_7bee_2b7c_2da5_9d1292ea5966 -->|calls| 8ce35f14_977d_60d3_1288_c6ed5fd9cb8e
  style 8ce35f14_977d_60d3_1288_c6ed5fd9cb8e fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/langchain/langchain_classic/callbacks/streaming_stdout_final_only.py lines 20–26

    def append_to_last_tokens(self, token: str) -> None:
        """Append token to the last tokens."""
        self.last_tokens.append(token)
        self.last_tokens_stripped.append(token.strip())
        if len(self.last_tokens) > len(self.answer_prefix_tokens):
            self.last_tokens.pop(0)
            self.last_tokens_stripped.pop(0)

Domain

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Defined In

Called By

Source

Frequently Asked Questions

What does append_to_last_tokens() do?
append_to_last_tokens() is a function in the langchain codebase, defined in libs/langchain/langchain_classic/callbacks/streaming_stdout_final_only.py.
Where is append_to_last_tokens() defined?
append_to_last_tokens() is defined in libs/langchain/langchain_classic/callbacks/streaming_stdout_final_only.py at line 20.
What calls append_to_last_tokens()?
append_to_last_tokens() is called by 1 function(s): on_llm_new_token.

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