# automaton.exceptions

# Source code for automaton.exceptions

    #    Copyright (C) 2014 Yahoo! Inc. All Rights Reserved.
    #
    #    Licensed under the Apache License, Version 2.0 (the "License"); you may
    #    not use this file except in compliance with the License. You may obtain
    #    a copy of the License at
    #
    #         http://www.apache.org/licenses/LICENSE-2.0
    #
    #    Unless required by applicable law or agreed to in writing, software
    #    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
    #    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
    #    License for the specific language governing permissions and limitations
    #    under the License.

    class AutomatonException(Exception):
        """Base class for *most* exceptions emitted from this library."""

    class InvalidState(AutomatonException):
        """Raised when a invalid state transition is attempted while executing."""

    class NotInitialized(AutomatonException):
        """Error raised when an action is attempted on a not inited machine."""

    class NotFound(AutomatonException):
        """Raised when some entry in some object doesn't exist."""

    class Duplicate(AutomatonException):
        """Raised when a duplicate entry is found."""

    class FrozenMachine(AutomatonException):
        """Exception raised when a frozen machine is modified."""

        def __init__(self) -> None:
            super().__init__("Frozen machine can't be modified")

this page last updated: 2026-07-16 04:46:42

Except where otherwise noted, this document is licensed under Creative Commons Attribution 3.0 License. See all OpenStack Legal Documents.

found an error? report a bug