Python 3.5+, pip3

1. Move to <project-dir>, create virtual environment and then activate it as

$ cd <project-dir>
$ virtualenv -p python3 .env
$ source .env/bin/activate

2. Add project to PYTHONPATH as

$ export PYTHONPATH="$PYTHONPATH:." # . corresponds to current directory(project-dir)

3. Then run test cases as

$ python -m unittest discover -s 'tests' -p '*.py'

4. Then run the application run.py as

$ python run.py                         # Interactive mode
$ python run.py input_file_path.txt     # File mode

1. If create_parking_lot command will be executed more than once, it will overwrite/remove the existing/previous information, and an empty parking lot will be created.

2. Make sure python points to python3 on target machine, or else make appropriate changes in bash scripts(available under /bin) .