Примеры модулей которые используют декораторы

pytest

@pytest.fixture(scope='module')
def first_router_from_devices_yaml():
    with open('devices.yaml') as f:
        devices = yaml.safe_load(f)
        r1 = devices[0]
    return r1

click

@click.command()
@click.option("--username", "-u", prompt=True)
@click.option("--password", "-p", prompt=True, hide_input=True, confirmation_prompt=True)
def cli(username, password):
    pass

flask

@main.route('/')
def index():
    pass


@main.route('/labs', methods=['GET', 'POST'])
def labs():
    pass


@main.route('/stats')
def stats():
    pass

backoff

@backoff.on_exception(
    backoff.expo, requests.exceptions.RequestException
)
def get_url(url):
    return requests.get(url)

dataclasses.dataclass

@dataclass
class IPAddress:
    ip: str
    mask: int


In [12]: ip1 = IPAddress('10.1.1.1', 28)

In [13]: ip1
Out[13]: IPAddress(ip='10.1.1.1', mask=28)