To use the interpreter mode you can use the command
On unix (linux / mac)
python3 -m racket-to-python-translator
On Windows
python -m racket-to-python-translator
To open a specific racket file, the command
python -m racket-to-python-translator file_name.rkt
To use unit tests
python -m racket-to-python-translator/tests/test_name.py