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from abc import ABC, abstractmethod
from typing import Any
from openhands.events.action import Action
class ActionParseError(Exception):
"""Exception raised when the response from the LLM cannot be parsed into an action."""
def __init__(self, error: str):
self.error = error
def __str__(self) -> str:
return self.error
class ResponseParser(ABC):
"""This abstract base class is a general interface for an response parser dedicated to
parsing the action from the response from the LLM.
"""
def __init__(
self,
) -> None:
# Need pay attention to the item order in self.action_parsers
self.action_parsers: list[ActionParser] = []
@abstractmethod
def parse(self, response: Any) -> Action:
"""Parses the action from the response from the LLM.
Parameters:
- response: The response from the LLM, which can be a string or a dictionary.
Returns:
- action (Action): The action parsed from the response.
"""
pass
@abstractmethod
def parse_response(self, response: Any) -> str:
"""Parses the action from the response from the LLM.
Parameters:
- response: The response from the LLM, which can be a string or a dictionary.
Returns:
- action_str (str): The action str parsed from the response.
"""
pass
@abstractmethod
def parse_action(self, action_str: str) -> Action:
"""Parses the action from the response from the LLM.
Parameters:
- action_str (str): The response from the LLM.
Returns:
- action (Action): The action parsed from the response.
"""
pass
class ActionParser(ABC):
"""This abstract base class is a general interface for an action parser dedicated to
parsing the action from the action str from the LLM.
"""
@abstractmethod
def check_condition(self, action_str: str) -> bool:
"""Check if the action string can be parsed by this parser."""
pass
@abstractmethod
def parse(self, action_str: str) -> Action:
"""Parses the action from the action string from the LLM response."""
pass
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