尝试使用 Process 从 python 脚本启动 Flask

Question

这是我的代码。 如果我直接调用 app.run() ，它可以正常工作（参见代码中的注释）。

from multiprocessing import Process
import time
from app import app


class WifiSwitcher:
    def __init__(self):
        self.server = None

    def start(self):
        if not self.is_running():
            # Note that uncommenting this works:
            # app.run()
            self.server = Process(target=app.run, kwargs={'port': 5000, 'debug': True, 'use_reloader': False})
            self.server.start()

    def stop(self):
        if self.is_running():
            self.server.terminate()
            self.server.join()
            self.server = None

    def is_running(self):
        return self.server is not None


if __name__ == '__main__':
    switcher = WifiSwitcher()
    switcher.start()
    time.sleep(10)
    switcher.stop()

这是我尝试使用 Process 运行时遇到的错误：

Traceback (most recent call last):
  File "C:\Users\jorda\AppData\Local\Programs\Python\Python310\lib\multiprocessing\popen_spawn_win32.py", line 93, in __init__
    reduction.dump(process_obj, to_child)
  File "C:\Users\jorda\AppData\Local\Programs\Python\Python310\lib\multiprocessing\reduction.py", line 60, in dump
    ForkingPickler(file, protocol).dump(obj)
AttributeError: Can't pickle local object 'Flask.__init__.<locals>.<lambda>'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "C:\Users\jorda\AppData\Local\Programs\Python\Python310\lib\multiprocessing\spawn.py", line 107, in spawn_main
    new_handle = reduction.duplicate(pipe_handle,
  File "C:\Users\jorda\AppData\Local\Programs\Python\Python310\lib\multiprocessing\reduction.py", line 79, in duplicate
    return _winapi.DuplicateHandle(
PermissionError: [WinError 5] Access is denied

非常感谢您提供的任何帮助