import python class into another folder in a package

I don't know about Flask specifically, but in Python you should generally include a __init__.py in every folder and subfolder for them to be recognised as modules and/or packages.

In the diagram you provide, there is no __init__.py in the app folder. Try putting one and re-post if that resolves your problem.

If it doesn't work, try:

import osprint(os.getcwd())

If the current working directory isn't the app directory, you'll have to work around this. One way would be:

import syssys.path.append('/path/to/app')import myapp.models

You can always see what directories are in your search path for modules by checking sys.path.

Update: Sorry I just realized that maybe you' re trying to run connections.py as a script. That would change you working directory to that of connections.py. Try importing connections.py from your main script with import models inside connections.py and see if you get an error.

Update (in reply to Edit 4): (I don't have enough reputation points to comment yet, so I reply here)

from models import dbdb.init_app(app)import myapp.routes

The problem in this piece of code is the import myapp.routes. Change that to import routes and it should work. As a rule of thumb, your main script's directory is your root directory. You can import any module located in your root directory from inside any other module (even modules inside a sub-folder!) with a simple import module.