from __future__ import annotations class PluginSystemError(Exception): message: str def __init__(self, message: str): self.message = message def __str__(self): return self.message class PluginNotFoundError(PluginSystemError): def __init__(self, message: str): super().__init__(f'未找到插件: {message}') class PluginInstallerError(PluginSystemError): def __init__(self, message: str): super().__init__(f'安装器操作错误: {message}')