#!/usr/bin/python3.8
# -*- coding: utf-8 -*-

from multiprocessing import Value, set_start_method
from ctypes import c_bool

class Storage():
  state = Value(c_bool, False)
  
if __name__ == "__main__":

  set_start_method('spawn')


# Traceback (most recent call last):
#   File "./test.py", line 54, in <module>
#     set_start_method('spawn')
#   File "/usr/lib64/python3.5/multiprocessing/context.py", line 231, in set_start_method
#     raise RuntimeError('context has already been set')
# RuntimeError: context has already been set

# Traceback (most recent call last):
#   File "./test.py", line 54, in <module>
#     set_start_method('spawn')
#   File "/usr/lib64/python3.8/multiprocessing/context.py", line 243, in set_start_method
#     raise RuntimeError('context has already been set')
# RuntimeError: context has already been set