from_file() — langchain Function Reference

Architecture documentation for the from_file() function in prompt.py from the langchain codebase.

Function python PromptManagement ExampleSelection calls 1

Entity Profile

PromptManagement→ ExampleSelection→ from_file() — langchain Function Reference

Dependency Diagram

graph TD
  fd622af6_8679_bc46_296c_4242a6c8150b["from_file()"]
  21bd3731_3333_8ace_7023_5dd43ed308cf["PromptTemplate"]
  fd622af6_8679_bc46_296c_4242a6c8150b -->|defined in| 21bd3731_3333_8ace_7023_5dd43ed308cf
  5dd38bd6_87a8_f04c_534c_00fe5bafa00f["from_template()"]
  fd622af6_8679_bc46_296c_4242a6c8150b -->|calls| 5dd38bd6_87a8_f04c_534c_00fe5bafa00f
  style fd622af6_8679_bc46_296c_4242a6c8150b fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/prompts/prompt.py lines 236–254

    def from_file(
        cls,
        template_file: str | Path,
        encoding: str | None = None,
        **kwargs: Any,
    ) -> PromptTemplate:
        """Load a prompt from a file.

        Args:
            template_file: The path to the file containing the prompt template.
            encoding: The encoding system for opening the template file.

                If not provided, will use the OS default.

        Returns:
            The prompt loaded from the file.
        """
        template = Path(template_file).read_text(encoding=encoding)
        return cls.from_template(template=template, **kwargs)