Converting my project to a package with modules

Question

I am converting my python project into packages, with sub-packages, with modules. The tree structure is as shown below (sorry for the long tree). When I run run.py, it imports MyEnvironment.environment which in turn has statements like from station import Station. It is at this stage that I get an error saying ModuleNotFoundError: No module named 'station'. I am not able to figure why this is happening. Note that it work when I do sys.append('.\Environment'), but it should work without it since I already added __init__.py. Could someone help here?

C:.
├───.vscode
│       settings.json
│
└───DRLOD-Package
    │   run.py
    │   __init__.py
    │
    ├───MyEnvironment
    │   │   agv.py
    │   │   environment.py
    │   │   job.py
    │   │   job_queue.py
    │   │   parent_area.py
    │   │   path_finding.py
    │   │   pdnode.py
    │   │   policy.py
    │   │   request.py
    │   │   station.py
    │   │   stats.py
    │   │   test.py
    │   │   __init__.py
    ```

Answer 1

In environment.py use from .station import Station