langchain/schema/messages.py

from langchain_core.messages import (
    AIMessage,
    AIMessageChunk,
    AnyMessage,
    BaseMessage,
    BaseMessageChunk,
    ChatMessage,
    ChatMessageChunk,
    FunctionMessage,
    FunctionMessageChunk,
    HumanMessage,
    HumanMessageChunk,
    SystemMessage,
    SystemMessageChunk,
    ToolMessage,
    ToolMessageChunk,
    _message_from_dict,
    get_buffer_string,
    merge_content,
    message_to_dict,
    messages_from_dict,
    messages_to_dict,
)

# Backwards compatibility.
_message_to_dict = message_to_dict

__all__ = [
    "get_buffer_string",
    "BaseMessage",
    "merge_content",
    "BaseMessageChunk",
    "HumanMessage",
    "HumanMessageChunk",
    "AIMessage",
    "AIMessageChunk",
    "SystemMessage",
    "SystemMessageChunk",
    "FunctionMessage",
    "FunctionMessageChunk",
    "ToolMessage",
    "ToolMessageChunk",
    "ChatMessage",
    "ChatMessageChunk",
    "messages_to_dict",
    "messages_from_dict",
    "_message_to_dict",
    "_message_from_dict",
    "message_to_dict",
    "AnyMessage",
]