how to resolve ModuleNotFoundError python error

exampleProject
--> models   
----> database
-------> __init__.py
-------> example1.py
-------> example1.py
--> services
----> __init__.py
----> service1.py
----> service1.py

i have created this table structure for my project and the problem is when i am importing example1.py file in service1.py i am getting ModuleNotFoundError and same error getting when importing service2.py file in example2.py

i have tried sys.path.append method. but still getting same error, files imported in init.py file.

i want to run this project in production, i had read somewhere its not good practice to use sys.path.append method in production.

this is normal structure of folder but if i want to increase folders and file and import file from various folder how can i do that?
can somebody help me in this, how to resolve this problem.

thank you.

first of all, the dags folder gets added to the sys path. Hence anything inside dags folder can be imported in Airflow env.

I will take an example that you have given. So let's consider the below folder structure resides inside dags folder eg /home/airflow/dags

exampleProject
--> models   
----> database
-------> __init__.py
-------> example1.py
--> services
----> __init__.py
----> service1.py

Lets assume that exampleProject/models/database/example1.py looks something like this

def example1_func():
    print("In example1_func")

Now, let's import the above function inside the services/service1.py, so below is how we will import the example1_func

from exampleProject.models.database.example1 import example1_func

def service1_func():
    example1_func()
    print('inside service1_func')

Now we can call the service1_func in our tasks by importing in similar method

from exampleProject.services.service1 import service1_func

# creating dag
...


# calling the function in a task
service1_func()
...