pylint Cannot import custom module and function (no-name-in-module)

I have the structure:

 |- file run_app.py

 |- folder 'tasks'

 |-- file app.py

There is a string in run_app.py:

import tasks.app

And pylint alerts that

run_app.py:8:0: E0611: No name 'app' in module 'tasks' (no-name-in-module)

When I rename tasks to taskss, the error disappears. Whats this? How to fix this strange behavior if I want to name the folder exactly 'tasks'?

Solution

Try to include an __init__.py file in the folder.

Reason:

The __init__.py files are required to make Python treat the directories as containing packages.

Structure:

package_name/
  __init__.py
  foo.py
  subpackage/
    other.py