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@ -1,6 +1,6 @@
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from __future__ import annotations
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from typing import Any, Sequence, Union
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from typing import Any, Literal, Sequence, Union
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from langchain.load.serializable import Serializable
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from langchain.schema.messages import BaseMessage
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@ -21,10 +21,12 @@ class AgentAction(Serializable):
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thoughts. This is useful when (tool, tool_input) does not contain
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full information about the LLM prediction (for example, any `thought`
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before the tool/tool_input)."""
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type: Literal["AgentAction"] = "AgentAction"
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def __init__(
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self, tool: str, tool_input: Union[str, dict], log: str, **kwargs: Any
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):
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"""Override init to support instantiation by position for backward compat."""
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super().__init__(tool=tool, tool_input=tool_input, log=log, **kwargs)
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@classmethod
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@ -42,6 +44,10 @@ class AgentActionMessageLog(AgentAction):
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prediction, and you need that LLM prediction (for future agent iteration).
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Compared to `log`, this is useful when the underlying LLM is a
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ChatModel (and therefore returns messages rather than a string)."""
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# Ignoring type because we're overriding the type from AgentAction.
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# And this is the correct thing to do in this case.
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# The type literal is used for serialization purposes.
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type: Literal["AgentActionMessageLog"] = "AgentActionMessageLog" # type: ignore
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class AgentFinish(Serializable):
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@ -56,8 +62,10 @@ class AgentFinish(Serializable):
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`Final Answer: 2` you may want to just return `2` as a return value, but pass
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along the full string as a `log` (for debugging or observability purposes).
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"""
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type: Literal["AgentFinish"] = "AgentFinish"
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def __init__(self, return_values: dict, log: str, **kwargs: Any):
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"""Override init to support instantiation by position for backward compat."""
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super().__init__(return_values=return_values, log=log, **kwargs)
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@classmethod
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