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import json
import re
from abc import abstractmethod
from typing import Dict, NamedTuple
class AgentAction(NamedTuple):
"""Action returned by AgentOutputParser."""
name: str
args: Dict
class BaseAgentOutputParser:
"""Base Output parser for Agent."""
@abstractmethod
def parse(self, text: str) -> AgentAction:
"""Return AgentAction"""
class AgentOutputParser(BaseAgentOutputParser):
"""Output parser for Agent."""
@staticmethod
def _preprocess_json_input(input_str: str) -> str:
corrected_str = re.sub(
r'(?<!\\)\\(?!["\\/bfnrt]|u[0-9a-fA-F]{4})', r"\\\\", input_str
)
return corrected_str
def _parse_json(self, text: str) -> dict:
try:
parsed = json.loads(text, strict=False)
except json.JSONDecodeError:
preprocessed_text = self._preprocess_json_input(text)
parsed = json.loads(preprocessed_text, strict=False)
return parsed
def parse(self, text: str) -> AgentAction:
try:
parsed = self._parse_json(text)
return AgentAction(
name=parsed["command"]["name"],
args=parsed["command"]["args"],
)
except (KeyError, TypeError, json.JSONDecodeError) as e:
return AgentAction(
name="ERROR",
args={"error": f"Error in parsing: {e}"},
)
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