Write a function to flatten the nesting in an arbitrary list of values.

For example:

[[1, 2, [3, 4]], [3, 4], [[[5]]]] -> [1, 2, 3, 4, 3, 4, 5]

To deploy project on your local machine create new virtual environment and execute this command:

pip install -r requirements.txt

To run all style checkers and tests use commands:

pytest

flake8 flatten

pylint flatten

mypy flatten.py