How to avoid ModuleNotFoundError when run unittest discover?

Question

The unittest file imports the module from its root directory and runs the file directly without any problems; however, when running the test in its upper directory using discovery mode, a ModuleNotFoundError occurs.

Of course the easiest solution would be to move that module to the root directory where the tests are run, but because I often need to run the test software directly, so this is not OK.

It is possible to create a copy, but it violates the DRY rules and is prone to various naming conflicts, which is not an elegant solution.

Is there any other way to solve this problem?

├──TheTest_0     
│  ├──__init__.py
│  ├──meta_test.py
│  ├──mydict.py
├──runTest.ps1

python -m unittest discover --start-directory .\ --pattern "meta_test.py"

    from mydict import Dict
ModuleNotFoundError: No module named 'mydict'

Answer 1

Add these two lines of code at the top of the test file to solve the problem.

import sys,os
sys.path.append(os.path.dirname(__file__))

Thanks @drum！