Python, Pycharm Flask import from package naming issues

Question

I have a directory structure for my Flask-Dash app:

I am following this tutorial: https://dash.plotly.com/integrating-dash

to combine one or more Dash apps with a Flask app.

But in wsgi.py, it could not find a reference for dash_app2.py until I renamed it using Roman numerals dash_appII.py.

Is there a naming convention in Python where two files in the same package or directory cannot have similar names like dash_app1.py and dash_app2.py?

It could not even find a reference to dash_app2.py in the __init__.py file in that directory which now looks like:

from .dash_app1 import dash_app1
from .dash_appII import dash_app2

I don't really want to use Roman numerals.
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Answer 1

Are you importing dash_app1 somewhere else in your app? I've found that the explicit relative import can sometimes cause namespace collisions if you use it after importing the packages somewhere else with a non-explicit import. Worth a shot to take a look or simply remove the . explicit and give it a go. All else hold equal, you shouldn't have issues importing the numeric versions of your files.