_load_prompt_from_file() — langchain Function Reference

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

Function python LangChainCore ApiManagement calls 1 called by 1

Entity Profile

LangChainCore→ ApiManagement→ _load_prompt_from_file() — langchain Function Reference

Dependency Diagram

graph TD
  b04be8f2_84fb_bd5b_0cee_565c728bde34["_load_prompt_from_file()"]
  fc5c0c58_eb79_058b_cc17_205426e210b8["loading.py"]
  b04be8f2_84fb_bd5b_0cee_565c728bde34 -->|defined in| fc5c0c58_eb79_058b_cc17_205426e210b8
  03095f0c_d553_b94d_6b94_d71c43044869["load_prompt()"]
  03095f0c_d553_b94d_6b94_d71c43044869 -->|calls| b04be8f2_84fb_bd5b_0cee_565c728bde34
  afd0dfa8_d6e1_0d44_ce7f_212370f6f020["load_prompt_from_config()"]
  b04be8f2_84fb_bd5b_0cee_565c728bde34 -->|calls| afd0dfa8_d6e1_0d44_ce7f_212370f6f020
  style b04be8f2_84fb_bd5b_0cee_565c728bde34 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/prompts/loading.py lines 160–177

def _load_prompt_from_file(
    file: str | Path, encoding: str | None = None
) -> BasePromptTemplate:
    """Load prompt from file."""
    # Convert file to a Path object.
    file_path = Path(file)
    # Load from either json or yaml.
    if file_path.suffix == ".json":
        with file_path.open(encoding=encoding) as f:
            config = json.load(f)
    elif file_path.suffix.endswith((".yaml", ".yml")):
        with file_path.open(encoding=encoding) as f:
            config = yaml.safe_load(f)
    else:
        msg = f"Got unsupported file type {file_path.suffix}"
        raise ValueError(msg)
    # Load the prompt from the config now.
    return load_prompt_from_config(config)