如何使用插件提供扩展Python程序的API？

from abc import ABC, abstractmethod

class PluginInterface(ABC):
    @abstractmethod
    def extend_api(self, *args, **kwargs):
        pass

from plugin_interface import PluginInterface

class MyPlugin(PluginInterface):
    def extend_api(self, *args, **kwargs):
        # 在这里实现您的插件功能
        pass

import importlib

def load_plugin(plugin_name):
    plugin_module = importlib.import_module(plugin_name)
    plugin_class = getattr(plugin_module, "MyPlugin")
    return plugin_class()

plugin = load_plugin("my_plugin")
plugin.extend_api()