in __init__.py:
   print('************')

in y__init__.py:
   if __name__ == '__main__':
       print('__init__.py directly exectuted!')
   else:
       print("be imported!")

in helloWord.py:
   import y__init__
   print("hello word!")
in main.py:
   from some_modules import helloWord

************
be imported!
hello word!