importlib does not work for run button

Hey guys, could you please help?
I got this script work with raw commandline but not working with run button.

if __name__ == '__main__':
    import sys
    import time
    import importlib
    import inspect

    
    m = importlib.import_module('m1')
    print(m)  # module object

    
    m.fun1()  # hello world1

   
    items = inspect.getmembers(m, inspect.isfunction)
    print(dict(items))

    time.sleep(10) # manually modify m1.py, to print hello world2

    new_module = importlib.reload(sys.modules['m1'])
    print(new_module)

    
    items = inspect.getmembers(new_module, inspect.isfunction)
    print(dict(items))

    new_module.fun1() # still print hello world1

The raw commandline gives:
<module 'm1' from 'xxxx\\m1.py'>
hello world1
None
{'fun1': <function fun1 at 0x000001578E0CA5C0>, 'fun2': <function fun2 at 0x000001578E28A980>}
<module 'm1' from 'xxxx\\m1.py'>
{'fun1': <function fun1 at 0x000001578E28AAC0>, 'fun2': <function fun2 at 0x000001579158FC40>}
hello world2
 

The pycharm run commandline
xxxx\python.exe xxxx\main.py 
<module 'm1' from 'xxxx\\m1.py'>
hello world1
None
{'fun1': <function fun1 at 0x000001578E0CA5C0>, 'fun2': <function fun2 at 0x000001578E28A980>}
<module 'm1' from 'xxxx\\m1.py'>
{'fun1': <function fun1 at 0x000001578E28AAC0>, 'fun2': <function fun2 at 0x000001579158FC40>}
hello world1