class langchain_core.messages.base.BaseMessage[source]

Bases: Serializable

Base abstract message class.

Messages are the inputs and outputs of ChatModels.

Pass in content as positional arg.

param additional_kwargs: dict [Optional]

Reserved for additional payload data associated with the message.

For example, for a message from an AI, this could include tool calls as encoded by the model provider.

param content: Union[str, List[Union[str, Dict]]] [Required]

The string contents of the message.

param id: Optional[str] = None

An optional unique identifier for the message. This should ideally be provided by the provider/model which created the message.

param name: Optional[str] = None

An optional name for the message.

This can be used to provide a human-readable name for the message.

Usage of this field is optional, and whether it’s used or not is up to the model implementation.

param response_metadata: dict [Optional]

Response metadata. For example: response headers, logprobs, token counts.

param type: str [Required]

The type of the message. Must be a string that is unique to the message type.

The purpose of this field is to allow for easy identification of the message type when deserializing messages.

pretty_print() None[source]
Return type


pretty_repr(html: bool = False) str[source]

html (bool) –

Return type


Examples using BaseMessage