# Store several students — each value is another dictionary
roster = {
    "harry": {"house": "Gryffindor", "year": 5},
    "luna": {"house": "Ravenclaw", "year": 4}
}

print(roster["luna"]["house"])   # two keys in a row

roster["harry"]["points"] = 50
print("Harry now has", roster["harry"]["points"], "points")