如何在Gunicorn启动其主进程之前触发函数

from gunicorn.app.base import BaseApplication

class PreStartApplication(BaseApplication):
    def __init__(self, app, pre_start_func):
        self.pre_start_func = pre_start_func
        self.app = app
        super().__init__()

    def init(self, parser, opts, args):
        pass

    def load(self):
        self.pre_start_func()
        return self.app

def my_pre_start_func():
    # 执行需要在主进程启动之前触发的操作
    print("Pre-start function triggered!")

from pre_start import PreStartApplication, my_pre_start_func
from my_app import app

if __name__ == '__main__':
    pre_start_app = PreStartApplication(app, my_pre_start_func)
    pre_start_app.run()