HumanMessage#

class langchain_core.messages.human.HumanMessage[source]#

Bases: BaseMessage

Message from a human.

HumanMessages are messages that are passed in from a human to the model.

Example

from langchain_core.messages import HumanMessage, SystemMessage

messages = [
    SystemMessage(
        content="You are a helpful assistant! Your name is Bob."
    ),
    HumanMessage(
        content="What is your name?"
    )
]

# Instantiate a chat model and invoke it with the messages
model = ...
print(model.invoke(messages))

Pass in content as positional arg.

Parameters:

  • content – The string contents of the message.

  • kwargs – Additional fields to pass to the message.

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: str | list[str | dict] [Required]#

The string contents of the message.

param example: bool = False#

Use to denote that a message is part of an example conversation.

At the moment, this is ignored by most models. Usage is discouraged. Defaults to False.

param id: str | None = None#

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

param name: str | None = 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: Literal['human'] = 'human'#

The type of the message (used for serialization). Defaults to “human”.

pretty_print() → None#
Return type:

None

pretty_repr(html: bool = False) → str#

Get a pretty representation of the message.

Parameters:

html (bool) – Whether to format the message as HTML. If True, the message will be formatted with HTML tags. Default is False.

Returns:

A pretty representation of the message.

Return type:

str

Examples using HumanMessage