Python3: problem to import personals modules

[PyForIO]

Hi, all.

I have a problem to import personals modules.

My folder:

test.py
/modules/__init__.py
/modules/config.py
/modules/notification.py

I execute just the script 'test.py', by IDLE, or by run into terminal.
This script call the module 'config.py' without any problem... as:

from modules.config import Config

the 'config.py' need module 'notification.py', and i wrote the code as:

try:
    from modules.notification import Info
except ImportError:
    print(f'Cant import notification module onto Config')
    sys.exit(1)

Result the error:

Error:
Cant import notification module onto Config

I tested with:

from modules import notification

or, by using:

from __future__ import absolute_import

try:
    from . import notification
except ImportError:

or

from .modules import notification

Same problem!

Really, i dont understand!?

[snippsat]

my_pack\
|-- test.py
|-- __init__.py
  modules\
  |-- __init__.py
  |-- config.py
  |-- notification.py 

test.py:

from modules.config import Config

print(Config())

config.py:

from my_pack.modules.notification import noti

def Config():
    return 'i am func <Config> in <config.py>'

print(noti())

notification.py:

def noti():
    return 'I am func <noti> in <notification.py>'

Running test.py which will call config.py(Config)--> which will call notification.py(noti).

Output:
C:\Python36\my_pack
λ ls
__init__.py  modules/  test.py

C:\Python36\my_pack
λ python test.py
I am func <noti> in <notification.py>
i am func <Config> in <config.py>

[PyForIO]

Excuse-me. It's my bad... into notification.py, i have old code python2!

After change pynotify module by notify2 module, it's run correctly...

Really sorry.