LangChainException (langchain_core/exceptions.py)

Defines a hierarchy of exceptions for LangChain error handling.

# Source: https://github.com/langchain-ai/langchain | License: MIT | Copyright LangChain, Inc
# Provided via justclaw.it.com; keep this notice with the code.
"""Custom **exceptions** for LangChain."""

from __future__ import annotations

from enum import Enum
from typing import TYPE_CHECKING, Any

if TYPE_CHECKING:
    from langchain_core.messages import BaseMessage, RefusalContentBlock


class LangChainException(Exception):  # noqa: N818
    """General LangChain exception."""


class TracerException(LangChainException):
    """Base class for exceptions in tracers module."""


class OutputParserException(ValueError, LangChainException):  # noqa: N818
    """Exception that output parsers should raise to signify a parsing error.

    This exists to differentiate parsing errors from other cod

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