format_messages() — langchain Function Reference

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

Function python PromptManagement ChatTemplates calls 1 called by 4

Entity Profile

PromptManagement→ ChatTemplates→ format_messages() — langchain Function Reference

Dependency Diagram

graph TD
  9e40405f_9251_5a40_24a2_2959e7b39db7["format_messages()"]
  93017235_36b7_3b85_820e_aa7d145183e5["BaseChatPromptTemplate"]
  9e40405f_9251_5a40_24a2_2959e7b39db7 -->|defined in| 93017235_36b7_3b85_820e_aa7d145183e5
  e9411289_e300_3889_9890_8b2d1e616969["format_prompt()"]
  e9411289_e300_3889_9890_8b2d1e616969 -->|calls| 9e40405f_9251_5a40_24a2_2959e7b39db7
  888559a1_7b1d_0bba_1c91_f63624147a91["aformat_messages()"]
  888559a1_7b1d_0bba_1c91_f63624147a91 -->|calls| 9e40405f_9251_5a40_24a2_2959e7b39db7
  262c7d87_05aa_3d71_5515_77e949d77865["format_messages()"]
  262c7d87_05aa_3d71_5515_77e949d77865 -->|calls| 9e40405f_9251_5a40_24a2_2959e7b39db7
  a912d932_8157_994e_b37d_ed55e4821d34["format_messages()"]
  a912d932_8157_994e_b37d_ed55e4821d34 -->|calls| 9e40405f_9251_5a40_24a2_2959e7b39db7
  a912d932_8157_994e_b37d_ed55e4821d34["format_messages()"]
  9e40405f_9251_5a40_24a2_2959e7b39db7 -->|calls| a912d932_8157_994e_b37d_ed55e4821d34
  style 9e40405f_9251_5a40_24a2_2959e7b39db7 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/prompts/chat.py lines 745–750

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

        Returns:
            List of `BaseMessage` objects.
        """