Import file from parent directory?

Question

I have the following directory structure:

application
    tests
        main.py
    main.py

application/main.py contains some functions.

Answer 1

To import a file in a different subdirectory of the parent directory, try something like this:

sys.path.append(os.path.abspath('../other_sub_dir'))
import filename_without_py_extension

Edit: Missing closing bracket.