from portafilter import Validator

validator = Validator(
    {
        'name': 'Flat White',
        'description': 'A Flat White is a coffee drink consisting of espresso with microfoam ',
        'ingredients': [
            {
                'name': 'Espresso',
            },
            {
                'name': 'Steamed Milk',
            }
        ],
    },
    {
        'name': 'required',
        'description': 'required|max:255',
        'ingredients': 'required|list',
        'ingredients.*.name': 'required|string',
    }
)

if validator.fails():
    # The data is not valid
    print(validator.errors())

# The data is valid