Importing initialized object from the same directory stay None - Python

Question

I have the following directory

dir1\
    ..\main.py
    ..\file2.py

in main.py i have the following code

import myObj
obj1 = None
def func1():
   global obj1
   obj1 = myObj.myObj()


if __name__ == "__main__":
    func1()

import file2.py

in file2.py:

from main.py import obj1

but obj1 is None , any idea why ?

Update: Changing the question to this : I have the following directory

dir1\
    ..\main.py
    ..\file2.py
    ..\file3.py

in main.py i have the following code

import file2

def func1():
    file2.init_func()

if __name__ == "__main__":
    func1()

in file2.py :

import myObj
obj1=None
def init_func():
    global myobj
    obj1= myObj.myObj()

in file3.py:

from file2 import obj1

But obj1 is None in file3,Why it is not initialized?