ModelCallLimitExceededError Class — langchain Architecture

Source Code

libs/langchain_v1/langchain/agents/middleware/model_call_limit.py lines 63–91

class ModelCallLimitExceededError(Exception):
    """Exception raised when model call limits are exceeded.

    This exception is raised when the configured exit behavior is `'error'` and either
    the thread or run model call limit has been exceeded.
    """

    def __init__(
        self,
        thread_count: int,
        run_count: int,
        thread_limit: int | None,
        run_limit: int | None,
    ) -> None:
        """Initialize the exception with call count information.

        Args:
            thread_count: Current thread model call count.
            run_count: Current run model call count.
            thread_limit: Thread model call limit (if set).
            run_limit: Run model call limit (if set).
        """
        self.thread_count = thread_count
        self.run_count = run_count
        self.thread_limit = thread_limit
        self.run_limit = run_limit

        msg = _build_limit_exceeded_message(thread_count, run_count, thread_limit, run_limit)
        super().__init__(msg)