students = [
    {
        'first_name': 'Иван',
        'last_name': 'Иванов',
        'grades': {
            'math': 3,
            'chemistry': 5,
            'literature': 4
        }
    },
    {
        'first_name': 'Пётр',
        'last_name': 'Петров',
        'grades': {
            'math': 5,
            'chemistry': 4,
            'literature': 3
        }
    }
]l_list= [['Alex','Geography',5], ['Lex', 'Biology', 4]]
print(l_list)
[['Alex', 'Geography', 5], ['Lex', 'Biology', 4]]
print(l_list[0])
['Alex', 'Geography', 5]e = {'Name': 'Alex', 'Biology': 5, 'Geography': 4}
print(e['Name'])
'Alex'