format_messages() — langchain Function Reference

Architecture documentation for the format_messages() function in chat.py from the langchain codebase.

Function python PromptManagement ChatTemplates calls 2 called by 1

Entity Profile

PromptManagement→ ChatTemplates→ format_messages() — langchain Function Reference

Dependency Diagram

graph TD
  3614db71_8c6d_b963_aa95_00d88d57c918["format_messages()"]
  4766cfc7_f772_eccc_6561_2122efd2c5e8["BaseStringMessagePromptTemplate"]
  3614db71_8c6d_b963_aa95_00d88d57c918 -->|defined in| 4766cfc7_f772_eccc_6561_2122efd2c5e8
  294ab761_8d23_d66d_6743_cc31d8ac0289["format_messages()"]
  294ab761_8d23_d66d_6743_cc31d8ac0289 -->|calls| 3614db71_8c6d_b963_aa95_00d88d57c918
  c5487c6c_d88c_b7f9_8f1f_8abaf332a76d["format()"]
  3614db71_8c6d_b963_aa95_00d88d57c918 -->|calls| c5487c6c_d88c_b7f9_8f1f_8abaf332a76d
  294ab761_8d23_d66d_6743_cc31d8ac0289["format_messages()"]
  3614db71_8c6d_b963_aa95_00d88d57c918 -->|calls| 294ab761_8d23_d66d_6743_cc31d8ac0289
  style 3614db71_8c6d_b963_aa95_00d88d57c918 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/prompts/chat.py lines 306–315

    def format_messages(self, **kwargs: Any) -> list[BaseMessage]:
        """Format messages from kwargs.

        Args:
            **kwargs: Keyword arguments to use for formatting.

        Returns:
            List of `BaseMessage` objects.
        """
        return [self.format(**kwargs)]