Nested dictionaries make us coupled to the internal structure

structured_access_to_dictionaries.py

def test_hobbies_names_is_reliant_on_hobbies_to_have_names():
    employee = {
        "name": "John",
        "age": 42,
        "hobbies": [
            {"name": "Rock Climbing", "_id": "1234"},
            {"name": "Acrobatics", "_id": "5678"},
        ],
    }

    hobbies_names = {hobby["name"] for hobby in employee["hobbies"]}

    assert hobbies_names == {"Rock Climbing", "Acrobatics"}