how to do setattr() from an imported module

[nutron]

I am trying to modify an attribute of a threaded function in the main python script from a function that has been imported from an external module.

I get this error : NameError: global name 'some_thread' is not defined

My intention is to move some functions out of the maincode.py file to the subcode.py file in order to clean up the maincode.py file and use the subcode.py file as a module. I don't know what the right way is to do setattr() from the imported module to a threaded function in the mainfile.py , nor do i know if that is even a good idea.

"mainfile.py" content :

import threading
from time import sleep
from subfile import thread_mod_func


icnt = 0

def the_thread_function(arg):
  
  while getattr(some_thread, "some_thread_en") == True:
    print("this is the value of "+ str(getattr(some_thread, "some_thread_val")) )
    sleep(0.5)

# moved this function to subfile.py
#
#def thread_mod_func(mod_val):
#  setattr(some_thread, "some_thread_val" , icnt)


if __name__ == '__main__':
   
   some_thread = threading.Thread(target=the_thread_function, args=("task",))
   setattr(some_thread, "some_thread_en" , True)                  # Initialize attribute
   setattr(some_thread, "some_thread_val" , 0)                    # Initialize attribute
   some_thread.start()
   
   
   while icnt < 5 :
     icnt =icnt + 1
     print("i am the main loop talking")
     thread_mod_func(icnt)
     sleep(1)
     
   some_thread.some_thread_en= False
   some_thread.join()
     
     

"subfile.py" contents:

import threading

def thread_mod_func(mod_val):
  setattr(some_thread, "some_thread_val" , mod_val)