_load_chat_prompt() — langchain Function Reference

Architecture documentation for the _load_chat_prompt() function in loading.py from the langchain codebase.

Function python LangChainCore LanguageModelBase

Entity Profile

LangChainCore→ LanguageModelBase→ _load_chat_prompt() — langchain Function Reference

Dependency Diagram

graph TD
  dbcccaa3_06ce_9980_1c9a_3460aa8ea3c6["_load_chat_prompt()"]
  fc5c0c58_eb79_058b_cc17_205426e210b8["loading.py"]
  dbcccaa3_06ce_9980_1c9a_3460aa8ea3c6 -->|defined in| fc5c0c58_eb79_058b_cc17_205426e210b8
  style dbcccaa3_06ce_9980_1c9a_3460aa8ea3c6 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/prompts/loading.py lines 180–190

def _load_chat_prompt(config: dict) -> ChatPromptTemplate:
    """Load chat prompt from config."""
    messages = config.pop("messages")
    template = messages[0]["prompt"].pop("template") if messages else None
    config.pop("input_variables")

    if not template:
        msg = "Can't load chat prompt without template"
        raise ValueError(msg)

    return ChatPromptTemplate.from_template(template=template, **config)