Simple example of a dynamic plugin system.

plugin_manager.py

"""
In my opinion the strenght of a system like this lies in that you can easily 
provide additional interfaces in later versions which can be accessed to 
users using the new version, however old versions can still run with under 
same plugin system.

License - MIT
"""

def my_plugin(interface_api, interface_config):
    print(interface_api, interface_config)
    # interface_api interface_config


def my_plugin_2(interface_config, interface_api):
    print(interface_api, interface_config)
    # interface_api interface_config


def my_plugin_3(interface_config):
    print(interface_config)
    # interface_config


class InterfaceAPI: ...


class InterfaceConfig: ...


class PluginManger:
    def __init__(self, api: InterfaceAPI, config: InterfaceConfig):
        self.plugins = []
        self.interface_map = {
            "interface_api": api,
            "interface_config": config
        }

    def load(self, plugin):
        """Loads the plugin and supplies any asked for interfaces."""
        interfaces = plugin.__code__.co_varnames
        plugin(*{name: self.interface_map[name] for name in interfaces if name in self.interface_map})


pm = PluginManger(InterfaceAPI(), InterfaceConfig())
pm.load(my_plugin)
pm.load(my_plugin_2)
pm.load(my_plugin_3)