I have the following list:

```
list_dict = [
        {'name': 'Old Ben', 'age': 71, 'country': 'Space', 'hobbies': ['getting wise']},
        {'name': 'Han', 'age': 26, 'country': 'Space', 'hobbies': ['shooting']},
        {'name': 'Luke', 'age': 24, 'country': 'Space', 'hobbies': ['being arrogant']},
        {'name': 'R2', 'age': 'unknown', 'country': 'Space', 'hobbies': []}
    ]

```

I would like to add a hobby to R2:

```
for i in range(len(list_dict)):
    people = list_dict[i]
    if people['name'] == 'R2':
        people['hobbies'] = ['lubrication']
print(list_dict)

```

I got what I was expecting but as a newbie I'd like to learn a few easy tricks to make it shorter.