Encountered few errors after starting project with flask run such as ModuleNotFoundError: No module named api

Question

I have flask based python project that I run with flask run. Full picture of errors:

 File "D:\ias\project_name\wsgi.py", line 4, in <module>
    from app import app as application
  File "D:\ias\project_name\entity\__init__.py", line 4, in <module>
    from api import *
ModuleNotFoundError: No module named 'api'

Below is my project's files structure and content of troubled files:

project_folder/
    entity/
       __init__.py
       api.py
    wsgi.py
    app.py

__init__.py contains this piece of code:

from api import * 

wsgi.py contains:

from app import app as application

if __name__ == '__main__':
    application.run()

app.py contains:

app = Flask(__name__)
app.config.from_object(__name__)

Answer 1

You can do some of the modifications to make it work better I suppose.

From:

project_folder/
    entity/
      __init__.py
      api.py
wsgi.py
app.py

To:

project_folder/
    entity/
      app/
        __init__.py # Import from app.api the blueprint, initialize the create_app() from here.
        api/
          __init__.py
          api.py
      wsgi.py
      app.py # Call the create_app() from app to initialize and then do app.run(). 

Answer 2

You don't have required permissions in the given directory.
You can run

sudo npm start

or update permissions for the directory

sudo chmod 777 -R Your_Dir/