How to get rid of PYTHONPATH="./:${PYTHONPATH}" while running a script which uses relative imports

Question

I have a directory as:

BASEDIR/
  -> codes/
      -> test.py

      -> models/
          -> __init__.py
          -> module1.py

      -> utils/
          -> __init__.py
          -> chind_module.py

      -> helpers/
          -> __init__.py
          -> submodule.py

I am inside the BASEDIR and run the code inside test.py as: python ./codes/test.py and it gives me error as:

Traceback (most recent call last):
  File "./codes/test.py", line 3, in <module>
    from models import create_model
  File "/home/shady/Desktop/Dresma/LPTN/codes/models/__init__.py", line 4, in <module>
    from codes.utils import get_root_logger, scandir
ModuleNotFoundError: No module named 'codes'

Where code inside test.py is as:

from codes.models import create_model
from codes.utils.options import *

def main():
    return True

if __name__ == '__main__':
    main()

Digging inside codes/models/__init__.py, I got that it has relative import as from codes.helpers import *

But when I did PYTHONPATH="./:${PYTHONPATH}" python test.py, it worked fine.

How could I run the program without using PYTHONPATH="./:${PYTHONPATH}" ?

I tried the following but nothing worked

from models import create_model
from utils.options import *

from .models import create_model
from .utils.options import *

from ..models import create_model
from ..utils.options import *